QuestionCalculate the expression $4 x y^{-1}$ for $x=9$ and $y=-2$ .

Studdy Solution

STEP 1

Assumptions1. The value of $x$ is9. The value of $y$ is -3. The expression is $4xy^{-1}$

STEP 2

First, we need to substitute the given values of $x$ and $y$ into the expression.
$4xy^{-1} =4 \cdot9 \cdot (-2)^{-1}$

STEP 3

Next, we need to calculate the value of $(-2)^{-1}$ .
$(-2)^{-1} = -\frac{1}{2}$

STEP 4

Substitute the value of $(-2)^{-1}$ back into the expression.
$4 \cdot9 \cdot (-2)^{-1} =4 \cdot9 \cdot -\frac{1}{2}$

STEP 5

Perform the multiplication operation.
$4 \cdot9 \cdot -\frac{1}{2} = -18$ So, the value of the given expression $4xy^{-1}$ is -18 when $x=9$ and $y=-2$ .

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