Thursday

August 28, 2014

August 28, 2014

Posted by **Marty** on Wednesday, May 23, 2007 at 7:38pm.

let the width of the uniform matte be x cm

We know the area of the picture is 60*40 or 2400 cm^2

The width of the whole frame would be 40+2x and the height would be 60+2x

since the area of the picture is equal to the area of the matte, the area of the whole thing is twice the area of the picture, so....

(40+2x)(60+2x) = 2(2400)

expand and solve that quadratic.

One of your answers will be extraneous, that is, it will make no sense for your picture. (hint: I got 10 cm for the width of the matte)

thank you SO much!!!! this helped me sooo much

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