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yuradex [85]
3 years ago
12

Express the formula P = 21 2w in terms of length,L. Use the new to find the length when the perimeter is 68 and the width is 13.

Mathematics
1 answer:
ElenaW [278]3 years ago
5 0

Answer:

  • l = P/2 -w
  • 21

Step-by-step explanation:

We know the perimeter formula to be ...

  P = 2L +2W

Dividing by 2 and subtracting W lets us write the formula for L:

  P/2 = L + W

  L = P/2 -W

__

For the given measurements, the length is ...

  L = 68/2 -13

  L = 21

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