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September 19, 2014

September 19, 2014

Posted by **Amanda** on Wednesday, November 17, 2010 at 7:49pm.

a. 3.6 inches <-- i think thats right

b. 5 inches

c. 7.3 inches

d. 15 inches

- Math -
**Reiny**, Wednesday, November 17, 2010 at 8:48pmAre the tiles to be used for the border?

let the width of the border be x

so the whole frame = (10+2x)(10+2x)

so area of border = (10+2x)(10+2x) - 100

but (10+2x)(10+2x) - 100 = 300

(10+2x)^2 = 400

10+2x = 20

2x = 10

x = 5

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