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July 1, 2015

Homework Help: exponents

Posted by kate on Sunday, April 5, 2009 at 6:16pm.

I need help with a few problems...

(4^3 x 5^-2)(5^4 x 4^-5)/ 4^-3 x 5^3

and

(2^x+2) - (2^x+5) = -7

please help!:)

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