lacrawford02 lacrawford02

25-08-2016
Mathematics

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Write a formula for the length l of a rectangle given its perimeter P and its width w. Justify your thinking.

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dalendrk dalendrk

25-08-2016

P = 2l + 2w |subtract 2w from both sides

2l = P - 2w |divide both sides by 2

l = (P - 2w)/2

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