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3 years ago

How do I figure this out?

Mathematics

1 answer:

blsea [12.9K]3 years ago

7 0

Answer: 20.5

Form your equation. The formula for perimeter is (2l)(2w) or l + l + w + w, where l = length and w = width.
(l - 5) + (l - 5) + (l) + (l) = 72

Simplify and solve your equation.
4l - 10 = 72
4l = 82
l = 20.5

Since l = length, length = 20.5 and width = 15.5

You can check your work, too:
20.5 + 20.5 + 15.5 + 15.5 = 72

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Answer:

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Given

x : y = 2 : 5, y is 80% of z

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Comparing the values of y:

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