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The length of a rectangle is (x - 9) feet. Its width is x feet. Write an expression you could use to find the perimeter

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Answer:

The expression for the perimeter of the rectangle is:
P = 4x - 18

Explanation:

Perimeter of a rectangle:

A rectangle has length l and width w. It's perimeter is given by:


P = 2(l + w)

In this question:


l = x - 9, w = x

So


P = 2(x - 9 + x) = 2(2x - 9) = 4x - 18

The expression for the perimeter of the rectangle is:
P = 4x - 18

User Hanae
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