Question

Please help and show work

Answer 1

(y^21)/((x^12)(27)

Explanation:

Multiply the exponents and change variables.

Answer 2

`=-(y^(21) )/(27x^(12) )`

Explanation:

work:

`(-3x^(4)y^(-7) )^(-3) =(1)/((-3x^(4)y^(-7))^(3) ) =(1)/(-27x^(12) y^(-21) ) =-(y^(21) )/(27x^(12) )`

Hope this helps.