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August 28, 2014

August 28, 2014

Posted by **Erika** on Monday, June 25, 2012 at 9:56pm.

(-4)^3-(-2)^4/2^2+5^2*7^0

The students answer was 5. Did the student win the prize?

I couldn’t seem to figure out how to answer this question. I got the answer -13, but my answer sheet said -43. I’m not very good with exponents, so could someone help me through this?

- Math -
**Steve**, Tuesday, June 26, 2012 at 12:12amadding some spaces for readability,

(-4)^3 - (-2)^4 / 2^2 + 5^2 * 7^0

do powers first:

-64 - 16 / 4 + 25 * 1

now multiply or divide:

-64 - 4 + 25

now add and subtract:

-68+25 = -43

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