Answer:
Step-by-step explanation:
It takes 36 minutes less time to travel 120 miles by car at night than by day because the lack of traffic allows the average speed at night to be 10 miles per hour faster than in the daytime. Find the average speed ,
Hope this helps:)
I need help ASAP I don’t get it
Answer:
The Sitting fee is 10
HELP!!!
Select the correct answer.
Which equation describes the line graphed above?
A. y = 3/2x - 6
B. y = 2/3x - 6
C. y = 3/2x + 4
D. y = 2/3x + 4
Which algebraic expression is equivalent to the expression below? 5x + 10x + x
A. 11x
B. 8x
C. 17x
D. 16x
Answer: D
Step-by-step explanation: Just simplify the whole expression. It’s all the same variable. 5x+10x= 15x. 15x+x=16x.
Which of the following equations demonstrates the Identity Property of One? A. 3 - 2 = 1 B. 4 • 1 = 14 C. 1 • b = b D. 0 + 1 = 1
3(y+1) for y=2
A. 6
B. 9
C. 7
D. 8
Answer:
B
Step-by-step explanation:
3(2+1)
3(3)
9
that how i solved it
Suppose a random sample of n=330 tenneagers 13 to 17 years of age was asked if they use social media. Of those surveyed, 252 stated that they do use social media. Find the sample proportion of tenneagers 13 to 17 years of age who use social media
Answer:
what is
Step-by-step explanation:
The sample proportion of the teenagers 13 to 17 years of age who use social media is 0.236.
What is a Sample Proportion?Sample proportion is defined as the proportion of something from a given sample which has a particular characteristic.
The formula to calculate the sample proportion is,
p = Number of successes in a particular sample / Sample size
Given that,
a random sample of n = 330 teenagers 13 to 17 years of age was asked if they use social media.
Sample size = 330
Of those surveyed, 252 stated that they do use social media.
We have to find the proportion of teenagers 13 to 17 years of age who use social media.
Number of failures = 252
Number of successes = 330 - 252 = 78
Sample proportion = 78 / 330 = 0.236
Hence the sample proportion is 0.236.
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A donor gives $100,000 to a university, and specifies that it is to be used to give annual scholarships for the next 20 years. If the university can earn 4% interest, how much can they give in scholarships each year?
9514 1404 393
Answer:
$7,358
Step-by-step explanation:
Assuming the interest is compounded annually, the amortization formula is useful here.
A = Pr/(1 -(1+r)^-t)
A is the annual scholarship, P is the principal invested at rate r for t years.
A = $100,000(0.04)/(1 -1.04^-20) = $7,358.18
The university could give $7,358 in scholarships each year.
HELP PLZ AND THANK YOU!:)
pls help meeeeeeeeeeee
Answer:
C.
Step-by-step explanation:
It's hard to explain, but trust me :)
5 is subtracted by 4 times a number. 4 times a number is 4x, because x is the unknown number. That would be 4x-5
Then, it says that 4x-5 is greater than 8 times a number. Again, 8 times a number is 8x because x is the unknown number.
And remember, > is greater than, and < is less than.
Hopefully you understand this problem for another time.
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. When designing a study to determine this population proportion, what is the minimum number of drivers you would need to survey to be 95% confident that the population proportion is estimated to within 0.05?
If it was later determined that it was important to be more than 95% confident and a new survey was commissioned, how would that affect the minimum number you would need to survey? Why?
a. If the confidence level is increased, then the sample size would need to increase because a higher level of confidence increases the margin of error.
b. If the confidence level is increased, then the sample size would need to decrease because increasing the sample size would create an even larger interval.
c. If the confidence level is increased, then the sample size would need to decrease because we would like the proportion of people who buckle up to be around 50%.
d. If the confidence level is increased, then the sample size would not be affected.
Answer:
The value is [tex]n = 384 [/tex]
The correct option is a
Step-by-step explanation:
From the question we are told that
The margin of error is E = 0.05
From the question we are told the confidence level is 95% , hence the level of significance is
[tex]\alpha = (100 - 95 ) \%[/tex]
=> [tex]\alpha = 0.05[/tex]
Generally from the normal distribution table the critical value of is
[tex]Z_{\frac{\alpha }{2} } = 1.96[/tex]
Generally since the sample proportion is not given we will assume it to be
[tex]\^ p = 0.5[/tex]
Generally the sample size is mathematically represented as
[tex]n = [\frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * \^ p (1 - \^ p ) [/tex]
=> [tex]n = [\frac{ 1.96 }{0.05} ]^2 *0.5 (1 - 0.5) [/tex]
=> [tex]n = 384 [/tex]
Generally the margin of error is mathematically represented as
[tex]E = Z_{\frac{\alpha }{2} } * \frac{\sigma }{\sqrt{n} }[/tex]
Generally if the level of confidence increases, the critical value of [tex]\frac{\alpha }{2}[/tex] increase and from the equation for margin of error we see the the critical value varies directly with the margin of error , hence the margin of error will increase also
So If the confidence level is increased, then the sample size would need to increase because a higher level of confidence increases the margin of error.
The security guard at a movie theater observed that approximately 18% of the
600 cars in the parking lot are from out of state. Which is the best estimate for the
number of cars in the parking lot that are from out of state?
A. 400
C. 200
B. 120
D. 12
Answer:
120
Step-by-step explanation:
18/100 x 600 = 108
estimate = round 18 to 20
20/100 x 600 = 120
I got y’all give me he right Awnser and I got brainlest and points !!
Answer:
it's option 3, 1/10. Hope this helps
Carbon is found in ALL of these materials seashells, wood, plants, and water.
Group of answer choices
True
False
Answer:
True because Plants need Carbon Air to grow. Seashells are made of tiny carbon atoms, Wood is 50% carbon and water is H20 known as Hydrogen and Oxygen. Water DOES have some Carbon in it! It gets the Carbon Dioxide from the rain!
The problem is in the picture
Answer
r=10
Step-by-step explanation:
A coin is tossed four times what are the odds against the coin showing heads all four times
Answer:
Step-by-step explanation:
The odds for 4 heads = (1/2)^4 = 1/16..
So the odds against is 1 - 1/16 = 15/16.
The odd against the coin showing heads all four times if, A coin is tossed four times is 15 / 16.
What is probability?The ratio of good outcomes to all possible outcomes of an event is known as probability. A lot of successful results for an experimental with 'n' results can be represented by the symbol x.
Given:
A coin is tossed four times,
Total outcomes = (head or tail) × 4 = 2 × 4 = 16
Total favorable outcomes = head = 1,
Calculate the probability of the coin showing a head all four times as shown below,
Probability = Total favorable outcomes / Total outcomes
Probability = 1 / 16
Calculate the odd against the coin showing heads all four times as shown below,
The odd against the coin showing heads all four times = 1 - The probability of the coin showing a head all four times
The odd against the coin showing heads all four times = 1 - 1 / 16
The odd against the coin showing heads all four times = 15 / 16.
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What is the value of the expression? 28 – 16 ÷ 8 – 4 3 8 22 24
Answer:
28 – 16 ÷ 8 – 4382224 = -4382198
Step-by-step explanation:
Answer:
B. 8Step-by-step explanation:
Simplifying
28 + 12x = 8x + -4
Reorder the terms:
28 + 12x = -4 + 8x
Solving
28 + 12x = -4 + 8x
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-8x' to each side of the equation.
28 + 12x + -8x = -4 + 8x + -8x
Combine like terms: 12x + -8x = 4x
28 + 4x = -4 + 8x + -8x
Combine like terms: 8x + -8x = 0
28 + 4x = -4 + 0
28 + 4x = -4
Add '-28' to each side of the equation.
28 + -28 + 4x = -4 + -28
Combine like terms: 28 + -28 = 0
0 + 4x = -4 + -28
4x = -4 + -28
Combine like terms: -4 + -28 = -32
4x = -32
Divide each side by '4'.
x = -8
Simplifying
x = -8
2. For the equation –3x + 2 = 8 and the inequality
- 3x + 2 > 8, which x-values indicated below are
solutions of the equation and which are solutions
of the inequality?
A. -3
В. -2
C. -1
D. 0
Answer: The answer would be B -2
Step-by-step explanation:It is B because if you put -1 in the equation then that would mean -3 * -2 would be 6 and then you would add 2 which would mean that 6 + 2 would give you the answer of 8 so therefore your answer is B. -2
There are a total of 32 pieces in a chess set, and 16 of them are pawns. What percent of the chess pieces are pawns?
Answer:
50%
Step-by-step explanation:
Answer:
50%
Step-by-step explanation:
32 Divided by 2 equals 16
Rewrite the radicand as a two factors, One of which is a perfect cube.
Answer:
A
Step-by-step explanation:
Use the discriminant to determine how many and what kind of solutions the quadratic equation 3x^2 + 4x = - 5 has.
A. one real solution
B. two complex (nonreal) solutions
C. no real or complex solutions
D. two real solutions
Pls help!
Answer:
C.
Step-by-step explanation:
The quadratic equation has two complex (nonreal) solutions option (B) is correct.
What is a quadratic equation?Any equation of the form [tex]\rm ax^2+bx+c=0[/tex] where x is variable and a, b, and c are any real numbers where a ≠ 0 is called a quadratic equation.
As we know, the formula for the roots of the quadratic equation is given by:
[tex]\rm x = \dfrac{-b \pm\sqrt{b^2-4ac}}{2a}[/tex]
We have a quadratic equation:
3x² + 4x = - 5
or
3x² + 4x + 5 = 0
D = b² - 4ac
b = 4, a = 3, c = 5
D = (4)² - 4(3)(5)
D = 16 - 60
D= -44
D < 0
Two complexes (nonreal) solutions
Thus, the quadratic equation has two complexes (nonreal) solutions option (B) is correct.
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The line to the right goes through the point (6, y). If the angle the graph makes with the x-axis is 22°, what is
the y-coordinate of the point to the nearest hundredth?
Answer:
The y-coordinate of the point is approximately 2.42.
Step-by-step explanation:
From the figure attached below the statement we derive the following equation to calculate the y-coordinate ([tex]y[/tex]), dimensionless, of the point in terms of the x-coordinate ([tex]x[/tex]), dimensionless, and angle of the line ([tex]\theta[/tex]), measured in sexagesimal degrees:
[tex]y = x\cdot \tan \theta[/tex] (1)
If we know that [tex]x = 6[/tex] and [tex]\theta = 22^{\circ}[/tex], then the y-coordinate of the point is:
[tex]y = 6\cdot \tan 22^{\circ}[/tex]
[tex]y\approx 2.42[/tex]
The y-coordinate of the point is approximately 2.42.
(02.01)A class has 9 boys and 15 girls. What is the ratio in simplest form that compares number of boys to total number of students? A 3:5 B 3:8 C 9:15 D 9:24
Answer:
A
Step-by-step explanation:
9/15 simplifies to 3/5, and : and / are the same, so the answer be 3:5, or A
I will give brainliest :)
1. Which is the solution of -6a > -36
• a 26
• a > -6
• as -6
• as 6
Answer:
the 2nd one a>-6.........
PLEASE HELP ME
Describe the graph of the function
[tex]f{x} = x {}^{3} - 18 {}^{2} + 107x - 210[/tex]
Include the y-intercept, x-intercepts, and the shape of the graph.
Answer:
x-intercept= (4.265,0)
y-intercept= (0,-534)
Step-by-step explanation:
Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.
Use digits to write the value of the 9 in this number.
139,648
Answer:
Hi the answer would be 9,000 or nine thousand
Step-by-step explanation:
Hope this helps <3
it cost 13.80 for 5 tickets how much would it cost for 3 tickets
Answer:
$8.28
Step-by-step explanation:
So, first we must find the price per ticket so we do
13.80/5 = 2.76
So the $2.76 per ticket
So now all we do to find the price of three tickets we times the price per ticket by 3
2.76 x 3 = $8.28
Calculate the average speed of a train that
completed a 525 km trip in 4.7 h. Round
your answer to the nearest whole number.
Answer:
4
Step-by-step explanation:
I don’t have one and I’m a sixth grader
Answer:
have one what ?
Step-by-step explanation:
also thats cute. when i was in sixth grade, i was homeschooled.
Answer
Ok good luck in school!
pfvr alguem me ajuda !!!
Answer:
...i cant see the pic
Step-by-step explanation:
The equation of the line that passes through (5, 15) and (2, 6) is y =3x.
True
False
Answer:
true
Step-by-step explanation:
the slope is 3
so the equation would be
y=3x
hope this helps :3
if it did pls mark brainliest
