Every 12 minutes, Bus A completes a trip from P to X


to S to X to P. Every 20 minutes. Bus B completes a


trip from Q to X to T to x to Q. Every 28 minutes,


Bus C completes a trip from R to X to U to X to R. At


1:00 p. M. , Buses A, B and C depart from P. Q and R.


respectively, each driving at a constant speed, and each


turning around instantly at the endpoint of its route.


Each bus runs until 11:00 p. M. At how many times


between 5:00 p. M. And 10:00 p. M. Will two or more buses


arrive at X at the same time?

Answers

Answer 1

Answer:

To solve this problem, we need to find the times when two or more buses arrive at X at the same time between 5:00 p.m. and 10:00 p.m. We can start by finding the arrival times of each bus at X.

Bus A arrives at X every 32 minutes (12 minutes to S + 20 minutes to X).

Bus B arrives at X every 48 minutes (20 minutes to T + 28 minutes to X).

Bus C arrives at X every 56 minutes (28 minutes to U + 28 minutes to X).

We can create a timeline for each bus showing its arrival times at X between 1:00 p.m. and 11:00 p.m.:

Bus A: X _ _ X _ _ X _ _ X _ _ X _ _ X _ _ X

Bus B: _ _ _ _ _ X _ _ _ _ _ X _ _ _ _ _ X

Bus C: _ _ _ _ _ _ _ X _ _ _ _ _ _ _ X _ _ _

The underscores represent the times when the bus is not at X.

Now we can look at the timeline between 5:00 p.m. and 10:00 p.m. (from the 8th to the 18th arrival of Bus A at X) and count the times when two or more buses arrive at X at the same time:

5:44 p.m. - Bus A and Bus B arrive at X at the same time.

6:24 p.m. - Bus A and Bus C arrive at X at the same time.

6:56 p.m. - Bus B and Bus C arrive at X at the same time.

7:36 p.m. - Bus A and Bus B arrive at X at the same time.

8:16 p.m. - Bus A and Bus C arrive at X at the same time.

8:48 p.m. - Bus B and Bus C arrive at X at the same time.

9:28 p.m. - Bus A and Bus B arrive at X at the same time.

10:08 p.m. - Bus A and Bus C arrive at X at the same time.

Therefore, there are 8 times between 5:00 p.m. and 10:00 p.m. when two or more buses arrive at X at the same time.

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Related Questions

Suppose f'(x) = 833 + 12x + 2 and f(1) = -4. Then f(-1) equals (Enter a number for your answer)

Answers

To find f(-1), we can use the fact that the derivative of a function f(x) gives us the slope of the tangent line to the graph of f(x) at any point x. We can use this information along with the given value of f(1) to find the equation of the tangent line at x=1, and then use that equation to find the value of f(-1).

First, we find the equation of the tangent line at x=1:
- The slope of the tangent line at x=1 is f'(1) = 833 + 12(1) + 2 = 847
- The point (1, f(1)) lies on the tangent line, so we can use the point-slope form of the equation of a line to write the equation of the tangent line:
y - (-4) = 847(x - 1)
y + 4 = 847x - 847
y = 847x - 851

Now we can use this equation to find f(-1):
- The point (-1, f(-1)) also lies on the tangent line, so we can substitute x=-1 and solve for y:
f(-1) + 4 = 847(-1) - 851
f(-1) + 4 = -1698
f(-1) = -1702

Therefore, f(-1) = -1702.
To find f(-1), we first need to determine the function f(x). We know f'(x) = 833 + 12x + 2. To find f(x), we need to integrate f'(x) with respect to x:

∫(833 + 12x + 2) dx = 833x + 6x^2 + 2x + C

Now, we use the given condition f(1) = -4 to find the constant C:

-4 = 833(1) + 6(1)^2 + 2(1) + C

Solve for C:

C = -4 - 833 - 6 - 2 = -845

Now we have the function f(x) = 833x + 6x^2 + 2x - 845. To find f(-1), plug in x = -1:

f(-1) = 833(-1) + 6(-1)^2 + 2(-1) - 845

f(-1) = -833 + 6 - 2 - 845

f(-1) = -1674

So, f(-1) equals -1674.

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Jenelle draws one from a standard deck of 52 cards. Determine the probability of drawing either a two or a ten? Write your answer as a reduced fraction. Answer= Determine the probability of drawing either a two or a club? Write your answer as a reduced fraction. Answer=

Answers

The probability of drawing either a two or a ten is (4+4)/52, which simplifies to 2/13.
The probability of drawing either a two or a club is (3+13)/52, which simplifies to 4/13.


For the first question: In a standard deck of 52 cards, there are four 2s and four 10s. The probability of drawing either a two or a ten is the number of successful outcomes (drawing a 2 or a 10) divided by the total number of possible outcomes (52 cards). So, the probability is (4+4)/52 = 8/52. This can be reduced to the fraction 2/13.

For the second question: There are four 2s and thirteen clubs in a standard deck of 52 cards. Since one of the 2s is a club, there are three additional 2s that are not clubs. The probability of drawing either a two or a club is the number of successful outcomes (3 additional 2s + 13 clubs) divided by the total number of possible outcomes (52 cards). So, the probability is (3+13)/52 = 16/52. This can be reduced to the fraction 4/13.

Therefore,
1) Probability of drawing either a two or a ten: 2/13
2) Probability of drawing either a two or a club: 4/13

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The teacher could buy the shirt online 3.50 each she would also pay a fee of 9.50 for shipping the shirts.

Answers

The function that represents the total cost (y) of buying x shirt online of $3.50 each and shipping charges of $9.50 is 3.50x + 9.50 = y

Cost of each shirt = $3.50

The fee for shipping the shirts is = $9.50

Total number of shirts bought by shirt online = x

The total cost of buying x shirts is represented by y

The total cost will be the sum of each cost of the shirt and shipping charges

y = 3.50x + 9.50

Hence, the function that represents the total cost y of buying x shirt online of $3.50 each and shipping charges of $9.50 is 3.50x + 9.50 = y

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The question is incomplete complete question is :

The teacher could buy the shirt online at 3.50 each she would also pay a fee of 9.50 for shipping the shirts. Write a function that can be used to find y the total cost in dollars of buying x shirts online.

a professor gives his students 6 essay questions to prepare for an exam. only 4 of the questions will actually appear on the exam. how many different exams are possible?

Answers

The different possible exams for the 6 essay questions from which only 4 appear is equal to 15.

n is the total number of items in the set = 6 essay questions

r is the number of items we want to choose = 4 questions

Using combinations,

which is a way of counting the number of ways to choose a certain number of items from a larger set without regard to order.

Choose 4 out of the 6 essay questions, without regard to the order in which they appear on the exam.

Use the formula for combinations,

C(n, r) = n! / (r! × (n - r)!)

Plugging in the values, we get,

⇒C(6, 4) = 6! / (4! × (6 - 4)!)

⇒C(6, 4) = 6! / (4! ×2!)

⇒C(6, 4) = (6 × 5 × 4 × 3) / (4 × 3 × 2 × 1)

⇒C(6, 4) = 15

Therefore, there are 15 different exams possible, each consisting of 4 out of the 6 essay questions provided by the professor.

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you are given that 4a - 2b = 10 and a + c = 3

write an expression in a,b and c that is equal to 23

give your answer in it's simplest form

Answers

Answer:

3a - 2b - c + 16 = 23

Step-by-step explanation:

so we want to write an equetion which containe a, b and c so we have given

4a - 2b = 10 and a + c = 3

so we are going to differentiate 10 to 7 + 3 it will be

4a - 2b = 10

4a - 2b = 7 + 3 ...then we insert a + c in place of 3 b/c they are equal

4a - 2b = 7 + a + c .... we take to the left side of the equal sighn

4a - a - 2b - c = 7

3a - 2b - c = 7

thrn if we want to write the equetion =23 we add 16 both side 3a - 2b - c + 16 = 23 .

Light travels 9.45 \cdot 10^{15}9.45⋅10
15
9, point, 45, dot, 10, start superscript, 15, end superscript meters in a year. There are about 3.15 \cdot 10^73.15⋅10
7
3, point, 15, dot, 10, start superscript, 7, end superscript seconds in a year.

Answers

The distance which this light travel per second is equal to 3 × 10⁸ meters per seconds.

What is speed?

In Mathematics and Science, speed is the distance covered by a physical object per unit of time.

How to calculate the speed?

In Mathematics and Science, the speed of any a physical object can be calculated by using this formula;

Speed = distance/time

By making distance the subject of formula, we have:

Distance, d(t) = speed × time

Distance = (9.45 × 10¹⁵ meters per year) × (1 year/ 3.15 × 10⁷ seconds)

Distance = 3 × 10⁸ meters per seconds.

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Complete Question:

Light travels 9.45 × 10¹⁵ meters in a year. There are about 3.15 × 10⁷ seconds in a year. How far does light travel per second?

2


How much water will a cone hold that has a diameter of 6 inches and a height of 21 inches.


Use 3. 14 for 7 and round your answer to the nearest whole number.


A 66 cubic inches


B 198 cubic inches


C) 594 cubic inches


D 2374 cubic inches

Answers

The volume of water a cone with a diameter of 6 inches and a height of 21 inches can hold is 198 cubic inches. So, the correct answer is B) 198 cubic inches.

To find the volume of water a cone with a diameter of 6 inches and a height of 21 inches can hold, we will use the formula for the volume of a cone: V = (1/3)πr²h.

Given a diameter of 6 inches, the radius (r) is 3 inches. The height (h) is 21 inches, and we will use 3.14 as an approximation for π.

V = (1/3) * 3.14 * (3²) * 21
V = (1/3) * 3.14 * 9 * 21
V = 3.14 * 3 * 21
V = 197.82 cubic inches

Rounding to the nearest whole number, the volume of water the cone can hold is approximately 198 cubic inches. Therefore, the answer is B) 198 cubic inches.

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Please Help I cant figure this out

Answers

The value of angle Y in the pentagon is 139°.

How to find the value of angle Y in the pentagon?

The sum of the interior angles of a polygon can be found using the formula:

sum of  interior angles = (n - 2) * 180

where n is the number of sides of the polygon

A polygon with 5 sides is called pentagon. Thus, n = 5.

sum of  interior angles = (5 - 2)*180 = 540°

Thus,

∠U + ∠W + ∠X + ∠Y  + ∠Z = 540°

90 + 108 + 121 + ∠Y + 82 = 540

401 + ∠Y = 540

∠Y = 540 - 401

∠Y = 139°

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In AABC, m ZA=62° and m ZB = 39º.


In AXYZ, m ZY=39° and mZz= 79º.


Julie says that the triangles are congruent because all the


corresponding angles have the same measure.


Ramiro says that there is not enough information given to


determine whether the triangles are similar, congruent, or


neither.


Is either student correct? Explain your reasoning.


Answer in complete sentences and include all relevant calculations.

Answers

we cannot determine whether the triangles are congruent or similar based on the given information .

Neither student is correct.

To determine whether two triangles are congruent or similar, we need to compare all three pairs of corresponding angles and all three pairs of corresponding sides.

In this case, we are given two pairs of corresponding angles: angle A in triangle ABC is congruent to angle Z in triangle XYZ, and angle B in triangle ABC is congruent to angle Y in triangle XYZ. However, we do not know the measure of angle C in triangle ABC or angle X in triangle XYZ, so we cannot compare the third pair of corresponding angles.

Furthermore, we are not given any information about the lengths of the sides of the two triangles, so we cannot compare the corresponding sides.

Therefore, we cannot determine whether the triangles are congruent or similar based on the given information.

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Find the absolute maximum and absolute minimum values off on each interval. (If an answer does not exist, enter DNE.) f(x) = -2x2²+ 8x + 400 (a) (-5, 11 ) Absolute maximum Absolute minimum: (b) (-5, 11 ) IN Absolute maximum: Absolute minimum: (C) (-5, 11) Absolute maximum: Absolute minimum:

Answers

The absolute maximum value of the function on the interval (-5, 11) is 670, which occurs at x = -5, and the absolute minimum value is approximately 400.847, which occurs at x ≈ 1.154.

To find the absolute maximum and minimum values of the function f(x) = -2x^3 + 8x + 400 on the interval (-5, 11), we need to consider the critical points and the endpoints of the interval.

First, we find the derivative of the function:

f'(x) = -6x^2 + 8

Setting f'(x) = 0 to find the critical points, we get:

-6x^2 + 8 = 0

x^2 = 4/3

x = ±√(4/3)

Since only √(4/3) is within the interval (-5, 11), this is the only critical point we need to consider.

Next, we evaluate the function at the endpoints of the interval:

f(-5) = -2(-5)^3 + 8(-5) + 400 = 670

f(11) = -2(11)^3 + 8(11) + 400 = -1666

Finally, we evaluate the function at the critical point:

f(√(4/3)) = -2(√(4/3))^3 + 8(√(4/3)) + 400 ≈ 400.847

Therefore, the absolute maximum value of the function on the interval (-5, 11) is 670, which occurs at x = -5, and the absolute minimum value is approximately 400.847, which occurs at x ≈ 1.154.

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Will give brainiest answer
which pair of equations would represent lines that are perpendicular to each other?
i. 3x - 2y = 12
ii. 3x + 2y = -12
iii. 2x - 3y = -12

Answers

Answer:

Step-by-step explanation:

Two lines are perpendicular to each other if their slopes are negative reciprocals of each other. So,  The equations i and ii are perpendicular to each other since their slopes are negative reciprocals of each other.

In other words, if the slope of one line is m, then the slope of the other line is -1/m.

To determine the slope of each equation, we can rewrite each equation in slope-intercept form, y = mx + b, where m is the slope and b is the

y-intercept.

i. 3x - 2y = 12

-2y = -3x + 12

y = (3/2)x - 6

The slope of this line is 3/2.

ii. 3x + 2y = -12

2y = -3x - 12

y = (-3/2)x - 6

The slope of this line is -3/2.

iii. 2x - 3y = -12

-3y = -2x - 12

y = (2/3)x + 4

The slope of this line is 2/3.

Therefore, equations i and ii are perpendicular to each other since their slopes are negative reciprocals of each other. Equation iii is not perpendicular to either of the other two equations.

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A car is purchased for $35,000. The owner finances the car at an interest rate of 4.6%, continuously compounded, for 6 years. What is the monthly payment on the car? Group of answer choices $640.62 $46,124.68 $35,046.00 $743.95

Answers

The monthly payment on the car is approximately $640.62. The correct option is A

To solve this problem

The formula for the monthly payment on a continuously compounded loan can be expressed as:

P = (r * A) / (1 - (1 + r)^(-n))

Where

P is the monthly payment r is the yearly interest rateA is the principal (i.e., the original amount borrowed) n is the number of payments (i.e., the number of years multiplied by 12)r is the annual interest rate (stated as a decimal and constantly compounded)

Plugging in the given values, we get:

P = (0.046 * 35000) / (1 - (1 + 0.046/12)^(-6*12))

P ≈ $640.62

Therefore, the monthly payment on the car is approximately $640.62.

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Nine hundred thirty six student's, 65% of the entire student body, attended the football game. find the size of the student body.

Answers

The size of the student body is approximately 1440 students.

To determine the size of the student body, we'll use the given information that 936 students represent 65% of the total number of students. We can set up a proportion to solve for the unknown total (let's call it "x"):

(65% of x) = 936

To express the percentage as a decimal, divide 65 by 100, which equals 0.65:

0.65 * x = 936

Next, to find the value of x, divide both sides of the equation by 0.65:

x = 936 / 0.65

x ≈ 1440

So, the size of the student body is approximately 1440 students. In this problem, we used the concept of percentage to find out the total number of students in the student body, knowing that 936 students (65%) attended the football game.

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WHATS THE AREAA OF THE PARALLELOGRAM

Answers

Answer:16 + (1/2) × 8 = 16 + 4 = 20 unit2

Step-by-step explanation:

Find the surface area of the net below in square centimeter 12,9,9

Answers

using the formula for the surface area of a box(cuboid) .
formula is
'(height x width) + 2(height x length) + 2(wi
2(h*w)+2(h*|)+2(w*|)
here we will take the word used in the question
"deep" to be its width..
-2(9*9) + 2(12*9) + 2(9*12)
=594cm?
Thank me later
o
У 3

A crane is being set up on a slope of. If the base of the crane is. 0 ft​ wide, how many inches should the downhill side of the base be raised in order to level the​ crane?

Answers

The downhill side of the crane base should be raised by approximately 4.53 inches to level the crane on a 2.5° slope.

We can use trigonometry here. Let x be the length (in inches) that the downhill side of the base should be raised. The slope of the ground is given to be 2.5°,

tan(2.5°) ≈ 0.0436

Now, using the equation,

x / 12 = 9tan(2.5°)

Here, we converted the base's width from feet to inches (by dividing by 12) and calculated the crane's required vertical displacement (inches) using the angle's tangent. When we simplify this equation, we obtain,

x = 9tan(2.5°)12

x ≈ 4.53 inches

Therefore, the downhill side of the base should be raised by about 4.53 inches to level the crane.

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Complete question - A crane is being set up on a slope of 2.5 degrees. If the base of the crane is 9.0 ft​ wide, how many inches should the downhill side of the base be raised in order to level the​ crane?

An instructor graded 200 papers and found 80 errors. If a paper is picked at


random, find the probability that it will have exactly 4 errors

Answers

The probability of a paper having exactly 4 errors can be calculated using the binomial probability formula, which is:

P(X = k) = (n choose k) * p^k * (1-p)^(n-k)

What is the probability of selecting a paper at random from 200 papers and instructor found 80 errors and the probability that a paper has exactly 4 errors?

In binomial probability formula P(X = k) = (n choose k) * p^k * (1-p)^(n-k)

n is the number of trials (in this case, the number of papers graded)

k is the number of successes (in this case, the number of papers with exactly 4 errors)

p is the probability of success (in this case, the probability that a paper has an error, which can be calculated by dividing the total number of errors by the total number of papers graded)

Calculate the probability of a paper having an error

p = 80/200 = 0.4

Calculate the probability of a paper having exactly 4 errors

P(X = 4) = (200 choose 4) * 0.4^4 * (1-0.4)^(200-4) ≈ 0.153

Therefore, the probability of picking a paper at random and finding exactly 4 errors is approximately 0.153 or 15.3%.

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Compute the variances in dollar amount and in percentage. (round to the nearest whole percent.) indicate whether the variance is favorable (f) or unfavorable (u).


budgeted amount - expense $106.00


actual amount $100.00


dollar variance $



percent variance


%


f or u

Answers

This is an unfavorable variance.

To calculate the dollar variance, we subtract the actual amount from the budgeted amount:

Dollar variance = Budgeted amount - Actual amount = $106.00 - $100.00 = $6.00 (favorable)

The dollar variance of $6.00 suggests that the actual expenses were less than the budgeted expenses, which is a favorable variance.

To calculate the percentage variance, we use the following formula:

Percentage variance = (Budgeted amount - Actual amount) / Budgeted amount x 100%

Substituting the values, we get:

Percentage variance = ($106.00 - $100.00) / $106.00 x 100% = 5.66% (rounded to the nearest whole percent)

The percentage variance of 5.66% suggests that the actual expenses exceeded the budgeted expenses by 5.66%, which is an unfavorable variance.

It's important to note that the dollar variance and percentage variance provide different perspectives on the variance, and they should be considered together to fully understand the implications of the variance. In this case, the dollar variance is favorable, indicating that the company spent less than expected.

However, the percentage variance is unfavorable, indicating that the company's expenses were higher than budgeted. The company may use this information to identify areas where they can reduce expenses in the future or adjust their budgeting process to be more accurate.

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X - (-1. 8) = - 31 what is the value of x?

Answers

The value of x in the equation is -32.8.

To solve for X in the equation X - (-1.8) = -31, we need to follow some basic algebraic steps.

The first step is to simplify the equation by adding the two negatives, which would result in X + 1.8 = -31. The next step would be to isolate X by subtracting 1.8 from both sides of the equation.

This will give us X = -32.8.
The value of X in this equation is -32.8.
It's essential to keep in mind the basic rules of algebra when solving such equations.

By following the rules and taking it step by step, we can solve any equation, regardless of how complex it may seem.
In conclusion,

X - (-1.8) = -31 is a straight forward equation that can be solved using basic algebraic steps.

The value of X is -32.8.
The given equation is X - (-1.8) = -31.
When you see a subtraction of a negative number, you can rewrite it as addition of the positive number. So, X - (-1.8) becomes X + 1.8. The equation now is:
X + 1.8 = -31
To find the value of X, subtract 1.8 from both sides of the equation:
X + 1.8 - 1.8 = -31 - 1.8

We can simplify by adding the values of the two negative numbers on the left side of the equation:

X + 1.8 = -31

Next, we can isolate the variable x by subtracting 1.8 from both sides of the equation:

X = -31 - 1.8

Simplifying further, we get:

X = -32.8
This simplifies to: X = -32.8
So, the value of X is -32.8 in the equation X - (-1.8) = -31.

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The South African mathematician John Kerrich, while a prisoner of war during World War II, tossed a coin10,000 times and obtained 5067 heads. (2pts)a) Is this significant evidence at the 5% level that the probability that Kerrich’scoin comes up heads is not 0. 5?Remember to specifythe null and alternative hypotheses, the test statistic, and the P-value. B) Give a 95% confidence interval to see what probabilities of heads are roughlyconsistent with Kerrich’s result

Answers

a) We can reject the null hypothesis and cthat theronclude is significant evidence that the probability of Kerrich's coin coming up heads is not 0.5. b) we get a confidence interval of 0.495 to 0.517.

a) To test the hypothesis that the probability of Kerrich's coin coming up heads is not 0.5, we can use a one-sample proportion test at the 5% level of significance. The null hypothesis is that the true proportion of heads is 0.5, and the alternative hypothesis is that it is not equal to 0.5.

The test statistic can be calculated as (5067-0.510000)/(sqrt(100000.5*0.5)) which simplifies to 5.401. The corresponding P-value can be found using a standard normal distribution table or a calculator to be approximately 3.3x10^-8, which is much smaller than 0.05. Therefore, we can reject the null hypothesis .

b) To construct a 95% confidence interval for the true proportion of heads, we can use the formula p ± z*sqrt((p(1-p))/n), where p is the sample proportion, z is the z-score corresponding to a 95% confidence level (which is 1.96), and n is the sample size. Substituting the values, we get a confidence interval of 0.495 to 0.517, which means that we can be 95% confident that the true proportion of heads falls within this range.

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WEATHER Suppose during springtime it rains about 40% of the time when school is dismissed for the day, Describe a model that could be used to simulate whether it will be raining when school is dismissed on a particular day during springtime. ​

Answers

One way to model this situation is by using a probability distribution, such as the binomial distribution. The binomial distribution models the probability of a certain number of successes (in this case, rain) in a fixed number of trials (in this case, school days during springtime).

Let's say we want to simulate whether it will be raining when school is dismissed on a particular day during springtime. We can define a success as rain and a failure as no rain. Then, the probability of success (rain) is 0.4, and the probability of failure (no rain) is 0.6.

To simulate whether it will be raining on a particular day, we can use a random number generator to generate a value between 0 and 1. If the value is less than or equal to 0.4, we can consider it a success (rain) and if it's greater than 0.4, we can consider it a failure (no rain).

We can repeat this process for a large number of trials (school days during springtime) to simulate the probability of rain over a given period of time. By keeping track of the number of successes (rainy days) and failures (non-rainy days), we can estimate the probability of rain during springtime when school is dismissed.

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A


Fill in the blank. If one line has a slope of 0. 5 and another distinct line has a


slope of those two lines are


A. Parallel


B. Not correlated


C. Perpendicular


e


D. Undefined


Is urgent , no link plis

Answers

If one line has a slope of 0. 5 and another distinct line has a slope of those two lines are Parallel. The correct answer is A.

Two lines are parallel if and only if they have the same slope. If two distinct lines have different slopes, then they cannot be parallel. In this case, one line has a slope of 0.5 and the other line's slope is unknown, so we cannot determine whether they are parallel or not just by looking at their slopes.

However, if the other line's slope is perpendicular to 0.5, then the lines would be perpendicular. Two lines are perpendicular if and only if the product of their slopes is -1. Therefore, if the other line's slope is -2, then the lines would be perpendicular (0.5 * -2 = -1).

If the other line's slope is undefined (i.e., the line is vertical), then the lines would not be parallel or perpendicular, but rather they would be skew lines.

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Jasmine deposited $400 in a bank that paid her 2. 15% interest every year. Assuming no deposits or withdrawals were made. How much money will she have in 5 years? round to nearest.




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Answers

Answer:

$444.89

Step-by-step explanation:

PV = $400

i = 2.15%

n = 5

Compound formula:

FV = PV (1 + i)^n

FV = 400 (1 +2.15%)^5

FV = $444.89 (round to nearest cents)

Rectangle abcd was dilated to create rectangle a’b’c’d’. the area of rectangle abcd is 16in^2 and the area of the rectangle a’b’c’d’ is 64in^2. which scale factor was used to dilate the rectangle?
help asap please!!!!!

Answers

If the area of rectangle abcd is 16in² and the area of the rectangle a’b’c’d’ is 64in², the scale factor used to dilate the rectangle was 2.

When a rectangle is dilated, its dimensions are multiplied by a common factor known as the scale factor. The scale factor is the ratio of the corresponding sides of the original rectangle and the dilated rectangle.

Let the scale factor be represented by k. The area of the original rectangle is 16 in², so we can write:

length x width = 16

Let L and W represent the length and width of the original rectangle, respectively. Therefore, we have:

LW = 16

After dilation, the area of the new rectangle is 64 in². The length and width of the new rectangle are kL and kW, respectively. Therefore, we can write:

(kL)(kW) = 64

Simplifying the above equation, we get:

k²LW = 64

Substituting the value of LW from the first equation, we get:

k²(16) = 64

Solving for k, we get:

k = √4 = 2

This means that the length and width of the new rectangle are twice the length and width of the original rectangle.

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15√2 = x√2please help me, how do i solve this? i'm in 9th grade and i completely forgot how to do this.

Answers

The equation 15√2 = x√2 can be solved, the value of x that satisfies the equation is 15.

To solve the equation 15√2 = x√2, you can divide both sides by √2 since the square root of 2 is a common factor on both sides of the equation. This gives:

15√2 / √2 = x√2 / √2

On the left side of the equation, the √2 and the denominator cancel out, leaving:

15

On the right side of the equation, the √2 and the denominator also cancel out, leaving:

x

So the solution to the equation is:

x = 15

Therefore, the value of x that satisfies the equation is 15.

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The diameter of om is 68 cm and the diameter of oj is 54 cm. if the length of jk is 8 cm, what is the length of lm? lm​

Answers

The length of lm is 10 cm.

To find the length of lm, we need to use the fact that om and oj are both diameters of their respective circles. We can start by finding the radius of each circle:

- The radius of om is half of its diameter, so it's 34 cm.
- The radius of oj is half of its diameter, so it's 27 cm.

Next, we can use the fact that jk is perpendicular to lm to create a right triangle:

- One leg of the triangle is jk, which we know is 8 cm.
- The other leg is half of the difference between the radii of the two circles, since lm connects the two circles. That means the other leg is (34 - 27)/2 = 3.5 cm.

Now we can use the Pythagorean theorem to find the length of lm:

lm² = jk² + (radius difference/2)²
lm² = 8² + 3.5²
lm² = 70.25
lm = 10 cm

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What relationship do you notice between the amount Tim has saves and the amount Jill has saved each week?

Answers

a. The Taylors may want to avail themselves of the help of a professional investment advisor.

b. They may prefer to find a reputable planner with appropriate credentials and experience

c,.  The Taylors should track their expenses more closely because overspending without replacement income can be disastrous

How can this portfolio be done?

Because successfully managing a large investment portfolio takes a great deal of time and​ knowledge, the Taylors may want to avail themselves of the help of a professional investment advisor.

2) They may prefer to find a reputable planner with appropriate credentials and experience. It will be important for them to shop around to find someone with whom they feel comfortable. A​ fee-only planner might be the best​ choice, especially if their current investments are doing well and the Taylors are not interested in making big changes that would generate​ sales, and​ commissions, for the planner

e) Whether or not Tim and Jill continue to work with a financial planner depends on their financial​ knowledge, time and commitment. Given their​ successful, independent, management of their financial situation to​ date, they may want to develop their own plan and have it reviewed by a planner as confirmation that they are on the right track.

f) The Taylors should track their expenses more closely because overspending without replacement income can be disastrous. In the event of an unexpectedly bad financial situation or a long downturn in the​ economy, they would not have the time or resources to rectify their misfortune and achieve their goals.

Their big five expenses are likely to be the same as the average U.S. household​ - taxes,​ food, housing, medical care and transportation. Most retirement benefits will be​ taxable, as will other investment earnings. Depending on the age of the house or​ appliances, repairs or replacements may be necessary.

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the population of a city with 750,000 people is devastated by a unknown virus that kills 20% of the population per day. How many people are left after 1 week

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The number of people left after one week is approximately 157286.

How to find the number of people left?

The population of a city with 750,000 people is devastated by a unknown virus that kills 20% of the population per day.

Therefore, each day, 20% of the people are killed by the virus.

Hence, let's find the number of people left as follows:

Therefore,

7 days = 1 week

number of people left = 750,000(1 - 20%)⁷

number of people left = 750,000(1 - 0.2)⁷

number of people left = 750,000(0.8)⁷

number of people left = 750,000(0.2097152)

number of people left = 157286.4

Therefore,

number of people left after 1 week =  157286.4

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1. Given XY and ZW intersect at point A Which conjecture is always true about he giver statement? A. XA = AY B. XAZ is acute C. XY is perpendicular to XY D. X, Y, Z and W are noncolinear. ​

Answers

The conjecture "X, Y, Z and W are noncolinear" is always true when given that line segments XY and ZW intersect at point A. So option D is the correct answer.

When line segments XY and ZW intersect at point A, it means that X, Y, Z, and W do not all lie on the same line. Since they do not all lie on the same line, they are considered non-collinear.

The conjecture "XA = AY" is not always true. It is only true if the lines XY and ZW are perpendicular bisectors of each other. The conjecture "XAZ is acute" is not always true. It is only true if angle ZAY is obtuse, in which case angle XAZ would be acute. The conjecture "XY is perpendicular to XY" is not a valid conjecture because it is a statement that XY is perpendicular to itself, which is always true but not informative.

So the correct answer is option D. X, Y, Z and W are noncolinear. ​

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The equation of the line of best fit relating age (in years) and the median height (in cm) of boys is given.

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the slope of   [tex]6.5[/tex] in this equation indicates that for each additional year of age, the median height of boys increases by approximately 6.5 cm. Thus, option D is correct.

What is median?

The statement that best interprets the slope in the context of the problem is "The slope is 6.5, this means that each year boys grow approximately  [tex]6.5[/tex]  cm."

The slope of a linear equation represents the rate of change, or the amount by which the dependent variable (in this case, median height) changes for each unit increase in the independent variable (in this case, age).

Therefore, the slope of  [tex]6.5[/tex] in this equation indicates that for each additional year of age, the median height of boys increases by approximately [tex]6.5[/tex] cm.

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