Chapter A.1, Problem 105AYU

To determine

To find: $2x{y}^{-1}$

Answer to Problem 105AYU

$-4$

Explanation of Solution

Given:

$x=2$ and $y=-1$

Calculation:

$2x{y}^{-1}=2\left(2\right){\left(-1\right)}^{-1}=\frac{4}{-1}=-4$