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April 19, 2015

April 19, 2015

Posted by **Lyle Eleda** on Thursday, April 12, 2012 at 1:53am.

- Algebra 2 -
**Steve**, Thursday, April 12, 2012 at 10:57amfinal dimensions of the framed mirror:

(20+2w) x (24+2w)

final area: (20+2w)(24+2w)

mirror area: 20*24

border area: (20+2w)(24+2w)-480

= 480 + 88w + 4w^2 - 480 = 416

w^2 + 22w - 104 = 0

(w+26)(w-4) = 0

w = 4

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