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Mathematics 9 Online
OpenStudy (anonymous):

Simplify 3^-9/3^-12

OpenStudy (anonymous):

3^12/3^9 3^3 27

OpenStudy (anonymous):

O.O Thanks , that was quick .

OpenStudy (anonymous):

no problem!

OpenStudy (anonymous):

But that's not really the answer I have answer choices ,

OpenStudy (anonymous):

what are the answer choices?

OpenStudy (anonymous):

1/3^3 1/3^21 3^3 3^21

OpenStudy (anonymous):

3^3 is the answer

OpenStudy (anonymous):

because 3^12/3^9 can be simplified to 3^3

OpenStudy (anonymous):

a negative exponent switches sides on the fraction

OpenStudy (anonymous):

K, thankiees yoouuu .

hero (hero):

Here's what you need to know: \[x^{-a} = \frac{1}{x^a}\] \[\frac{1}{x^{-a}} = x^a\]

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