Answer
a) $\frac{1}{y^3}$
b) $\frac{1}{z^2}$
c) $\frac{1}{y^3}$
Work Step by Step
a) $y^2$$y^{-5}$ = $y^{2-5}$ = $y^{-3}$ = $\frac{1}{y^3}$
b) $z^5$$z^{-3}$$z^{-4}$ = $z^{5-3-4}$ = $z^{-2}$ = $\frac{1}{z^2}$
c) $\frac{y^{7}y^{0}}{y^{10}}$ = $y^{7+0-10}$ = $y^{-3}$ = $\frac{1}{y^3}$
