### Home > CCA > Chapter A > Lesson A.1.2 > Problem A-18

A-18.

Remember that one meaning of the word “evaluate” is to replace a variable with a number and to calculate the result. For example, evaluating the expression when

*gives the solution*

Evaluate the expressions below for the given values.

Substitute −1 for

*d*.Simplify the terms and combine them.

7

Follow the steps in part (a).

Put everything you substituted inside parentheses so you do not lose your negative signs.

Follow the steps in part (a).

−2

Follow the steps in part (a).