Answer
$\frac{3}{2}$
Work Step by Step
$-3x^{-1}y$ if x=2, and y = -1.
Substitute the values:
Remember that to make an exponent positive, take the reciprocal of its base and then apply the opposite of the previous exponent to the denominator.
$-3(2)^{-1}*-1$
$-3*\frac{1}{2^{1}}*-1.$
Therefore, the answer is:
$\frac{3}{2}$
