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October 1, 2014

October 1, 2014

Posted by **casey** on Thursday, September 3, 2009 at 9:12pm.

- algebra 1 -
**DrBob222**, Thursday, September 3, 2009 at 9:24pmLet L = length

W = L-80

So L-80 + L-80 + L + L = 640.

Solve for L.

- algebra 1 -
**Emily**, Thursday, September 3, 2009 at 9:28pmArea = L * W

Perimeter = 2L + 2W

W = L - 80

So, plug in the width formula into the perimeter equation, which would look like this:

640 = 2L + 2(L-80)

640 = 2L + 2L - 160

640 = 4L - 160

800 = 4L

L = 200

It looks like you don't even need the information about the area of the playground; just the perimeter.

Hope this helps! If you have any questions about my method just post :)

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