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September 15, 2014

September 15, 2014

Posted by **sabrina** on Tuesday, June 3, 2008 at 1:12pm.

- algebra -
**Reiny**, Tuesday, June 3, 2008 at 1:20pmfirst triangle : x by 4x

second triangle : 4x+5 by x+2

area of first = x(4x)

area of second = (4x+5)(x+2)

so (4x+5)(x+2) - x(4x) = 270

solve for x, you should get x=20

(check: original is 20 by 80, Area = 1600

second is 22 by 85, Area = 1870)

difference in area = 1870-1600 = 270

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