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likoan [24]
3 years ago
6

Oliver took a math quiz last week. There were 25 problems on the quiz and Oliver answered 80% of them correctly. How many proble

ms did Oliver get correct?
Mathematics
1 answer:
aleksandr82 [10.1K]3 years ago
6 0

Answer:

He answered 20 questions correctly.

Step-by-step explanation:

25×.8(80%) = 20.

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If y varies directly as x and y = 8 when x = 4, what is the value of y when x = 16? a. 32 b. 16 c. 64 d. 28
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By finding the proportional relation between x and y, we will see that when x = 16, we have y = 32.

<h3>How to get the value of y when x = 16?</h3>

If y varies directly with x, then we can write the relation as:

y = k*x

Where k is the constant of proportionality.

First, we know that when x = 4, we have y = 8, replacing that we get:

8 = k*4

Solving for k, we get:

k = 8/4 = 2.

Then the relation between x and y is:

y = 2*x

When x = 16, we have:

y = 2*16 = 32

Then the correct option is a.

If you want to learn more about proportional relations:

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5 0
2 years ago
Question 5 (25. pts)
Pie

Answer:

No matter where the center of rotation is located on the coordinate plane, each point in the preimage is the same distance from the point of rotation as its corresponding point in the rotated images. This distance is not affected by changing the location of P. Although this investigation covered vertices only, it's clear that any point on a shape or figure will be affected similarly.

Step-by-step explanation:

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The sum of a number and five divided by fifteen
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