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Simplify the expression so there is only one positive power for the base, -5. -5^7(divided by) -5^2

A. 1/5^9
B. -5^9
C. -5^5
D. 1/5^5

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Simplify the expression so there is only one positive power for the base, -5. -5^7(divided by) -5^2...
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