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2 years ago

What percent of 40 = 32, I know....I should know this!

Mathematics

2 answers:

nika2105 [10]2 years ago

8 0

32 is 80 percent of 40...

Hunter-Best [27]2 years ago

5 0

To find that divide 32 by 40 and multiply by 100 so
32/40 *100% =80%
Therefore 32 is 80 percent of 40

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an architect wants to build three similar triangles such that the ratio of the middle triangle. The smallest one has side length

vampirchik [111]

Answer: 15

<u>Step-by-step explanation:</u>

small: 5 12 13

middle: __ 36 39

large: 45 108 117

Notice that to get from the small to the large, multiplied by 9

5(9) = 45 12(9) = 108 13(9) = 117

That is because the sides are proportional $\dfrac{5}{45}=\dfrac{12}{108}=\dfrac{13}{117}\rightarrow\dfrac{1}{9}$

To get from small to middle, multiply by 3

5(3) = 15 12(3) = 36 13(3) = 39

To solve it using proportions:

$\dfrac{5}{x}=\dfrac{12}{36}\\\\\\\text{Cross Multiply and solve for x:}\\5(36)=12x\\\\\dfrac{5(36)}{12}=x\\\\5(3)=x\\\\\large\boxed{15}=x$

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2 years ago

A countertop is in the shape of a trapezoid. The lengths of the bases are 70.5 and 65.5 inches long. The height of the counterto

den301095 [7]

The answer is 1224. You do 70.5 + 65.5, divided by two, then you take that answer and multiply by 18 to get 1224

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2 years ago

The two lines graphed below are parallel. How many solutions are there to the system of equations?

coldgirl [10]

Solutions just means the amount of times the lines intersect, so there are no solutions. Since the lines are parallel, they’re going the exact same direction forever and ever, never intersecting. Hope this helps!

6 0

2 years ago

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What is the surface area of the prism?

kow [346]

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What is 512.3÷ 0.25

Mademuasel [1]

Answer:

2049.2

Step-by-step explanation:

512.3÷ 0.25= 2049.2

You can use a calculator... (or long division.)

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