Question

Please answer thx so much

Answer 1

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: $A=l*w$

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