## Algebra 1

-$\frac{2}{5}$
If a=-5, and b=-4, in order to evaluate the expression $\frac{-b}{2a}$ all we must do is simply plug in the givens into the expression. $\frac{-b}{2a}$=$\frac{-(-4)}{2(-5)}$=$\frac{4}{-10}$=-$\frac{2}{5}$