Homework Help: Math

Posted by Lizzie on Friday, July 27, 2012 at 5:59am.

A square painting is surrounded by a 3-cm-wide frame. If the total area of the painting plus the frame is 81 cm2, find the dimensions of the painting.

Math - drwls, Friday, July 27, 2012 at 9:30am
Let painting height/width be x.
(x+6)^2 = 81
x + 6 = 9
x = 3

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