### Home > AC > Chapter 2 > Lesson 2.1.5 > Problem2-56

2-56.

Evaluate each expression to find $y$.

1. $y=2+4.3x\ \text{when}\ x=−6$

Substitute $−6$ in for $x$. $y=2+4.3(−6)$

Multiply and simplify.

$y=2+(−25.8)$

$y=−23.8$

1. $y=(x−3)^2\ \text{when}\ x=9$

Follow the steps in part (a).

Don't forget to use the correct order of operations.

1. $y = x − 2 \ \text{when}\ x = 3.5$

Follow the steps in part (a).

1. $y = 5x − 4\ \text{when}\ x = − 2$

Follow the steps in part (a).

$−14$