### Home > AC > Chapter 3 > Lesson 3.1.4 > Problem3-39

3-39.

Evaluate each equation below.

1. For $y=5+8x$ when $x=4$, what does $y$ equal?

Substitute $4$ for $x$.

Solve for $y$.

$y=5+8(4)$

$y=37$

1. For $a=3−5c$ when $c=−0.5$, what does $a$ equal?

Follow the steps in part (a).

1. For $n=2d^2−5$ when $d=−2$, what does $n$ equal?

Follow the steps in part (a).

Remember to follow the Order of Operations.

1. For $v=−3(r−3)$ when $r=−1$, what does $v$ equal?

Follow the steps in part (a).

$v=12$