Question

6-44: evaluate the expressions below using x=-2, y=-5, and z=3.
a. $x*y*z$
b. $3(x+y)$

Explanation:

Step1: Substitute values into a.

$x=-2,\ y=-5,\ z=3$
$(-2) \times (-5) \times 3$

Step2: Calculate expression a.

$(-2) \times (-5) = 10$; $10 \times 3 = 30$

Step3: Substitute values into b.

$x=-2,\ y=-5$
$3 \times (-2 + (-5))$

Step4: Calculate expression b.

$-2 + (-5) = -7$; $3 \times (-7) = -21$

Answer:

a. 30
b. -21