Answer
$\frac{25}{9}$
Work Step by Step
You have $y^{-2}$$z^{2}$.Since $a^{-b}$=$\frac{1}{a^b}$ we have $\frac{z^2}{y^2}$ as the new expression..Plug in z=-5 and y=-3 in order to evaluate the expression:
$\frac{(-5)^2}{(-3)^2}$ -evaluate exponents-
=$\frac{25}{9}$
