Question

evaluate 3xy + y for x = 4 and y = - 4.

Explanation:

Step1: Substitute values of x and y

Substitute $x = 4$ and $y=-4$ into $3xy + y$.
$3\times4\times(-4)+(-4)$

Step2: Calculate multiplication first

$3\times4\times(-4)=-48$. So the expression becomes $-48 - 4$.

Step3: Calculate the final result

$-48-4=-52$

Answer:

$-52$