Question 876709
Let x = the width of the matting.
The area of the picture = area of matting = 5*4 = 20
(2x+5)(2x+4)= 40 in^2
4x^2+18x+20=40
4x^2+18x-20=0
x=0.92"
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Ed
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 *[invoke quadratic "x", 4, 18, -20]