Question

Select the equivalent expression,

Answer 1

C. x^21*y^-21

Explanation:

When it's set up like this, you have to multiply the exponents. -3*-7=21, and 3*-7=-21. Thus, the only option for this equation is going to be C.

Hope that this helps, have a good day/night and good luck!

Answer 2

C

Explanation: