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October 25, 2014

October 25, 2014

Posted by **Chad** on Monday, March 1, 2010 at 9:37pm.

I know the answer is 9 & 2 1/3 but I found it by trial and error. Is there an easier way to find the answer to this question? Thanks!

- math -
**drwls**, Monday, March 1, 2010 at 9:58pmthe answer can be found by using algebra.

L = 3W + 2

L*W = 21

(3W+2)*W = 21

3w^2 + 2W -21 = 0

(3W -7)(W +3) = 0

W = 7/3

Ignore the negative root

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