Erin needs to make at least a 75 on her semester exam to maintain a B in the class. Which number line correctly represents this situation?
o
75
b.
75
C.
75
d.
75
Ο Α
OB
о с
OD
1
2
Answers
Answer:
C
Step-by-step explanation:
..............$(_(4)5
Answer:
C
Step-by-step explanation:
at least a 75 means
minimum mark is 75
so it is >= 75
so it is option C
full circle and greater than 75 to the right of number line
Related Questions
There are eight rolls of paper towels in one package. There are four packages of paper towels in one box. There are ten boxes. How many rolls of paper towels are there?
Answers
Answer:
320 rolls
Step-by-step explanation:
Because there are ten boxes, and four packages fit into one box, 40 packages fit into ten boxes. If you then multiply 40 by 8, you get 320. You multiply 40 by 8 because 8 rolls of paper towels fit into one package.
David rolls a fair dice 30 times.
How many times would David expect to roll an even number?
Answers
Answer:
15 times
Step-by-step explanation:
Answer this question
Answers
Answer: y = 2/3x
or if you also need the y intercept then its. y = 2/3x +3.66
Answer:
1/2
Step-by-step explanation:
Can someone tell me the answer to this
Answers
Answer:
7
Step-by-step explanation:
If ABCD is dilated by a scale factor of 1/2
then A'B'C'D' becomes half the size of ABCD
so if side D'A' is 3.5
Then D'A' = 1/2 DA
3.5 = 1/2 DA
DA = 7
School rules permit no fewer than 2 teachers per 25 students. There are at least 245 students enrolled in the school. If x represent teachers and y represents students, which system of linear inequalities can be used to determine the possible number of teachers and students at the school?
2y ≥ 25x and y ≥ 245
2y ≤ 25x and y ≥ 245
25y ≤ 2x and y ≥ 245
25y ≥ 2x and y ≥ 245
Answers
Answer:
(b) 2y ≤ 25x and y ≥ 245
Step-by-step explanation:
You want the teacher/student ratio to be at least 2/25, so ...
x/y ≥ 2/25
25x ≥ 2y . . . . . multiply by 25y
2y ≤ 25x . . . . . swap sides to get the form used in answer choice B
The other inequality says the number of students is at least 245:
y ≥ 245
Answer:
B- 2y ≤ 25x and y ≥ 245
Step-by-step explanation:
Peep the attachment (proof)
PLS ANSWER THIS
NO LINKS
Answers
Answer:
30 units
Step-by-step explanation:
Use distance formula
WARNING not positive that this is right
The length of a rectangle is 7 inches longer than it is wide. If the perimeter is 34 inches, what are the dimensions of the rectangle
Answers
w=5
l2+w2=34 which is the perimeter formula
Which value of x makes the equation 1.25 (4x-10) = 7.5 true
Answers
Answer:
x = 6
Step-by-step explanation:
1.25(4x - 10) = 7.5
~Use the distributive property
5x - 12.5 = 7.5
~Add 12.5 to both sides
5x = 30
~Divide 5 to both sides
x = 6
Best of Luck!
PLEASE I NEED HELP WITH BOTTOM PART WILL MARK BRAINLIEST!!
Answers
Answer:
13.
parallel: y = 1/3x -3
perpendicular: y = -3x - 3
14.
parallel: y = 4x - 1/2
perpendicular: y = -1/4x - 1/2
15.
parallel: y = -2x + 4
perpendicular: y= 1/2x + 4
16.
parallel: y = -2x-2
perpendicular: y= 1/2x-2
17.
parallel: y = -2x+8
perpendicular: y= 1/2x + 8
Step-by-step explanation:
A perpendicular has a negative reciprocal slope and a parallel has the same slope
which best describes why these two figures are similar or not similar
Answers
Answer:
These two figures are not similar because 8x4 does not equal 6x10.
Step-by-step explanation:
8x4=32
6x10=60
32<60
Not equal.
Please I need help
SAVE ME
Answers
The exterior angle of a triangle is equal to the sum of 2 opposite interior angles of the triangle.
Here,
2 opp. interior angles = 30° & (4x + 2)°
Exterior angle = (8 + 6x)°
So,
8 + 6x = 4x + 2 + 30
8 + 6x = 4x + 32
8 - 32 = 4x - 6x
-24 = -2x
=》 12 = x
________
꧁✿ ᴿᴬᴵᴺᴮᴼᵂˢᴬᴸᵀ2222 ✬꧂
Sally spent $13 out of her $20 weekly allowance. what percentage of her allowance hes she spent?
Answers
Explanation: 20 * 65% = 13
Explanation: 20 / 5 = 4
4 = 20%
4+4+4=60%
1=5%
60%+5%=65%
FAST PLEASE
What is the simplified expression for 4 to the power of negative 3 multiplied by 3 to the power of 4 multiplied by 4 to the power of 2 whole over 3 to the power of 5 multiplied by 4 to the power of negative 2 ?
3 over 4
4 over 3
4 to the power of 2 over 3
3 to the power of 3 over 4
Answers
Answer:
4/3
Step-by-step explanation:
You can simplify the exponent expression using exponent rules. The rules are:
A positive exponent is the number of times the base multiplies by itself.
A negative exponent is the number of times the base divides itself.
Multiplying same bases with exponents is simplified by adding the exponents.
Dividing same bases with exponents is simplified by subtracting the exponents.
A zero exponent always evaluates as 1.
The expression \frac{4^{-3}3^44^2}{3^54^{-2}}
3
5
4
−2
4
−3
3
4
4
2
can be simplified first using the negative exponent rule to move base with negative exponent to the other part of the fraction.
\frac{4^{-3}3^44^2}{3^54^{-2}} = \frac{4^{2}3^44^2}{3^54^{3}}
3
5
4
−2
4
−3
3
4
4
2
=
3
5
4
3
4
2
3
4
4
2
Now use the multiplication rule to simplify numerator and denominator.
\frac{4^{2}3^44^2}{3^54^{3}} = \frac{4^{2+2}3^4}{3^54^{3}} = \frac{4^{4}3^4}{3^54^{3}}
3
5
4
3
4
2
3
4
4
2
=
3
5
4
3
4
2+2
3
4
=
3
5
4
3
4
4
3
4
Finally, use the division rule to reduce the fraction.
\frac{4^{4}3^4}{3^54^{3}}= 4^{4-3} 3^{4-5} = 4*3^{-1} = \frac{4}{3}
3
5
4
3
4
4
3
4
=4
4−3
3
4−5
=4∗3
−1
=
3
4
a 35 centimeter ribbon is cut into 8 equal pieces what is the length of each piece?
Answers
divide 35 by 8 to get this answer
What is the solution of x3 – x2 > 9(x – 1)
Answers
Consider the cubic equation,
x³ - x² = 9 (x - 1)
We can solve this by factoring:
x³ - x² - 9x + 9 = 0
x² (x - 1) - 9 (x - 1) = 0
(x² - 9) (x - 1) = 0
(x - 3) (x + 3) (x - 1) = 0
So the cubic has roots at x = 3, x = -3, and x = 1. Split the real line into the open intervals (-∞, -3), (-3, 1), (1, 3), and (3, ∞). Check if the inequality holds for some test point taken from each interval:
• in (-∞, -3), take x = -4. Then
(-4)³ - (-4)² = -80
9 (-4 - 1) = -45
but -80 > -45 is not true. So this interval is not in the solution set.
• in (-3, -1), take x = -2. Then
(-2)³ - (-2)² = -12
9 (-2 - 1) = -27
and -12 > -27 is true. So x in (-3, -1) satisfies the inequality.
• in (1, 3), take x = 2. Then
2³ - 2² = 4
9 (2 - 1) = 9
but 4 > 9 is not true.
• in (3, ∞), take x = 4. Then
4³ - 4² = 48
9 (4 - 1) = 27
and 48 > 27 is true.
So, the complete solution set is
(-3, -1) U (3, ∞)
(where U denotes union)
You pick a card at random. Without putting the first card back, you pick a second card at random.
1
2
3
4
What is the probability of picking a 3 and then picking a 3?
Write your answer as a percentage.
Answers
Which will have the Greater Rate of Change? Growing 14 inches in 2 years or Growing 11 inches in 19 months
Answers
Answer:
growing 11 inches in 19 months
Step-by-step explanation:
The Ninoy Aquino International Airport (NAIA) and Singapore Changi Airport (SIN) are about 2,400 kilometers apart. A Singapore Airlines passenger plane leaves NAIA, traveling towards SIN at an average speed of 800 kilometers per hour. A Philippine Airline passenger plane leaves SIN at the same time, traveling toward NAIA, averaging 640 kilometers per hour. How long will it take them to meet?
Answers
The relative velocity of one plane with respect to the other plane is given
by the sum of the velocity of the two planes.
The time it would take the two planes to meet is [tex]\underline{1. \overline 6 \ km/hr}[/tex]Reasons:
The distance between the two airports = 2,400 km
Speed of the plane from NAIA = 800 kilometer per hour
Speed of the plane coming from SIN = 640 kilometers per hour
Let t represent the time after which the two planes meet, we have;
800 × t + 640 × t = 2,400
[tex]\displaystyle t = \frac{2,400 \ km}{800 \ km/hr + 640 \ km/hr} = \frac{5}{3} \ km/hr = 1.\overline 6 \ km/hr[/tex]
The time after which the two planes meet, t = [tex]\underline{1. \overline 6 \ km/hr}[/tex]
Learn more here:
https://brainly.com/question/17228388
What is the slope of the line through (-5, -10) and (-1, 5)?
Answers
Answer:
look at the photo ..............................If someone would be so kind as to help that would be great ;) This is timed btw
Answers
Answer:
-6 on edge
Step-by-step explanation:
BRAINLIEST?what is 37/10 rename the faction as a mixed number
Answers
Answer:
It's 3 [tex]\frac{7}{10}[/tex]
Hope that helps and that I didn't take too long.
To find the mixed number, take how many times that the denominator (bottom number) can divide into the numerator (top number). In this case, it is 3 times, with 7 remaining. So, it will be [tex]3\frac{7}{10}[/tex].
You have $700 to buy a new carpet for your bedroom. Write and solve an inequality that represents the costs per square foot that you can pay for the new carpet. Specify the units of measure in each step.
Answers
Answer:
3 squear meator of concrete
Step-by-step explanation:
Vlad the Impaler promotes many of his soldiers into generals (don't ask what happened to the past generals). Haley thinks the proportion is about 64%, but wants to estimate the proportion better by sampling soldiers until her margin of error for a 94% Confidence Interval is less than 0.008. How many soldiers should Haley sample?
Answers
Using the formula for the margin of error, it is found that Haley should sample 12,724 soldiers.
In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]\alpha[/tex], we have the following confidence interval of proportions.
[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
In which
z is the z-score that has a p-value of [tex]\frac{1+\alpha}{2}[/tex].
The margin of error is of:
[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
Estimate of the proportion of 64%, hence [tex]\pi = 0.64[/tex].
94% confidence level
So [tex]\alpha = 0.94[/tex], z is the value of Z that has a p-value of [tex]\frac{1+0.94}{2} = 0.97[/tex], so [tex]z = 1.88[/tex].
Margin of error of less than 0.008 is wanted, hence, we have to find n when M = 0.008.
[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
[tex]0.008 = 1.88\sqrt{\frac{0.64(0.36)}{n}}[/tex]
[tex]0.008\sqrt{n} = 1.88\sqrt{0.64(0.36)}[/tex]
[tex]\sqrt{n} = \frac{1.88\sqrt{0.64(0.36)}}{0.008}[/tex]
[tex](\sqrt{n})^2 = (\frac{1.88\sqrt{0.64(0.36)}}{0.008})^2[/tex]
[tex]n = 12723.84[/tex]
Rounding up, Haley should sample 12,724 soldiers.
A similar problem is given at https://brainly.com/question/25404151
At what point does the graph of the line y = 4x + 3 cross the y-axis?
O (4, 3)
(3, 0)
(0, 3)
I don't know
Answers
The 3 in the equation is the y-intercept. Therefore, that’s when it will cross the y-axis.
The equation of a line is given by:
y = mx + c
where m is the slope of the line and c is the y-intercept.
The point at which the graph of the line y = 4x + 3 crosses the y-axis is 3.
What is an equation of a line?The equation of a line is given by:
y = mx + c
where m is the slope of the line and c is the y-intercept.
Example:
The slope of the line y = 2x + 3 is 2.
The slope of a line that passes through (1, 2) and (2, 3) is 1.
We have,
The equation of a line y = 4x + 3
The graph of the line crosses the y-axis when x = 0.
This is called the y-intercept.
There are two ways to get the y-intercept point.
From the definition of the equation of a line in slope intercept form we have,
y = mx + c
Where c is the y-intercept.
y = 4x + 3
So,
c = 3
We can also find the y-intercept when x = 0.
y = 4x + 3
y = 4 x 0 + 3
y = 3
Thus,
The point at which the graph of the line y = 4x + 3 crosses the y-axis is 3.
Learn more about equation of a line here:
https://brainly.com/question/23087740
#SPJ2
107 16 Marks If I was asked to think of a number and multiply it by 2, I could write this algebraically as 2x. Write the following algebraically, using x as your unknown. "I think of a number, take away 1 and multiply the result by 3."
Answers
Answer:
The algebraic expression would be 3(x-1)
a variable whose value is less than zero
Answers
Answer:
It is called a negative number. For example, -4 -976 -23 -21
there are 1600 kilocalories in the 5 cups of dog food that mike gives his adult dog. Mike gives his puppy 2 cups of the same dog food. how many kilocalories are there in the 2 cups serving? i realllllllly need help
Answers
Answer: There are 640 kilocalories in the 2 cups of dog food.
Step-by-step explanation: I hope it helps you!
picture below please help
Answers
Answer:
60 mph
Step-by-step explanation:
If you divide 300/5 you get 60.
hope this helps.
Hi I need help finding the slope of this function.
Answers
Answer:+0.5 is the slope
Step-by-step explanation:
(-2,-4) (-1,-3.5) (0,-3) (1,-2.5) (2,-2)
Q1. For each of the following values of a,b and c, where
(a) a = -20, b = -10, c = 5
(b) a = -40, b = 10, c = -5
Show that:
(i) a÷b ≠ b÷a
(ii) (a÷b)÷c ≠ a÷(b÷c)
(iii) a÷(b+c)≠(a÷b)+(a÷c)
Answers
Explanation:-
⟨a⟩Given that
a = -20
b = -10
c = 5
⟨i⟩ LHS = a÷b
⇛ -20÷-10
⇛ -20/-10
⇛ 2
and
RHS = b÷a
⇛ -10÷-20
⇛ -10/-20
⇛ 1/2
LHS ≠ RHS
a÷b ≠ b÷a
⟨ii⟩
LHS = (a÷b)÷c
⇛ (-20÷-10)÷5
⇛ 2÷5
⇛ 2/5
RHS = a÷(b÷c)
⇛ -20÷(-10÷5)
⇛ -20÷-2
⇛ -20/-2
⇛ 10
LHS ≠ RHS
(a÷b)÷c ≠ a÷(b÷c)
⟨iii⟩ LHS = a÷(b+c)
⇛ -20÷(-10+5)
⇛ -20÷(-5)
⇛ -20/-5
⇛ 4
RHS = (a÷b)+(a÷c)
⇛ (-20÷-10)+(-20÷5)
⇛ 2+(-4)
⇛ 2-4
⇛ -2
LHS ≠ RHS
a÷(b+c) ≠ (a÷b)+(a÷c)
⟨b⟩.Given that
a = -40
b = 10
c = -5
⟨i⟩ LHS = a÷b
⇛ -40÷1
⇛ -40/1
⇛-40
and
RHS = b÷a
⇛ 10÷-40
⇛ 10/-40
⇛ -1/4
LHS ≠ RHS
a÷b ≠ b÷a
⟨ii⟩.
LHS = (a÷b)÷c
⇛ (-40÷10)÷-5
⇛ -4÷-5
⇛ 4/5
RHS = a÷(b÷c)
⇛ -40÷(10÷-5)
⇛ -40÷-2
⇛ -40/-2
⇛ 20
LHS ≠ RHS
(a÷b)÷c ≠ a÷(b÷c)
⟨iii⟩ LHS = a÷(b+c)
⇛ -40÷(10-5)
⇛ -40÷(5)
⇛ -40/5
⇛ -8
RHS = (a÷b)+(a÷c)
⇛ (-40÷10)+(-40÷-5)
⇛ (-4)+8
⇛ 8-4
⇛ 4
LHS ≠ RHS
a÷(b+c) ≠ (a÷b)+(a÷c)
Conclusion :-
Commutative property Associative Property Distributive Property does not hold in the set of integers under Division