lacrawford02
lacrawford02 lacrawford02
  • 25-08-2016
  • Mathematics
contestada

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 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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