Answer
$\frac{-20}{9}$
Work Step by Step
You have the expression $\frac{2x}{y^2 z^-1}$.Since $a^{-b}$=$\frac{1}{a^b}$ our new expression would be $\frac{2xz}{y^2}$.Plug in z=2,y=-3 and z=-5 to evaluate the expression.
$\frac{2*2*-5}{(-3)^2}$ -evaluate the exponent-
$\frac{2*2*-5}{9}$ -simplify-
=$\frac{-20}{9}$
