Question

Evaluate the expression when x=-1 and y= -8 z=1/4xyz

Answer 1

Substitute the values of x, y and z to the expression:

$x=-1,\ y=-8,\ z=\dfrac{1}{4}\\\\xyz=(-1)(-8)\left(\dfrac{1}{4}\right)=(8)\left(\dfrac{1}{4}\right)=\dfrac{8}{4}=2$