Posted by **math1** on Sunday, December 19, 2010 at 7:51am.

Sheila has a picture frame that measures 20 cm by 30 cm. If she puts a mat inside the frame that decrease the picture by 264cm^2, how wide is the mat?

- solving quadratic equations by factoring -
**Henry**, Sunday, December 19, 2010 at 12:20pm
A1 = L*W =20 * 30 = 600cm^2.

Am = 264cm^2 = Area of mat.

Am = 20W = 264,

20W = 264,

W = 264 / 20 = 13.2cm.

OR

30W = 264,

W = 264 / 30 = 8.8CM.

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