The perimeter of a rectangle is 80 inches, if the width is 18 inches what is the area of the rectangle? A.22 sq. in B.324 sq. in C.396 sq. in D.6,400 sq. in

396 in^2

Step-by-step explanation:

The perimeter of a triangle is given by the formula:

● P = 2w+2L

L is the length and w is the width

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The width hereis 18 inches and the perimeter is 80 inches.

Replace w by 18 and P by 80 to find L.

● P= 2L+2w

● 80 = 2L + 2×18

● 80 = 2L + 36

Substrat 36 from both sides

● 80-36 = 2L+36-36

●44 = 2L

Divide both sides by 2

● 44/2 = 2L/2

● 22 = L

So the length is 22 inches

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The area of a rectangle is given by the formula:

● A= L×w

● A = 22×18

● A = 396 in^2

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step-by-step explanation:

10cm

step-by-step explanation:

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