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xxMikexx [17]
3 years ago
8

Please answer thx so much

Mathematics
1 answer:
const2013 [10]3 years ago
6 0

Answer: E

Step-by-step explanation:

length: 3w

width: ?

perimeter: 20 inches

Formula: P=2(l+w)

Plug your values into the formula.

20=2(3w+w)

Divide by 2.

\frac{20}{2}=3w+w

Combine like terms and simplify.

10=4w

Divide by 4

\frac{10}{4}=w\\\frac{5}{2}=w

Now determine the length, replacing the value of w.

3(\frac{5}{2})=\frac{15}{2}

Now, to find the area, use the following formula: A=l*w

A=(\frac{15}{2})(\frac{5}{2})\\A=\frac{75}{4}\\ A=18.75in^2

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