### Home > INT1 > Chapter A > Lesson A.1.1 > ProblemA-9

A-9.

The word “evaluate” has many different meanings. In math, when you are asked to evaluate an expression for a specified value of the variable(s), you are being asked to determine the value of the expression. You do this by replacing a variable with the given number and calculating the result.

Evaluate the expressions below for the given values.

1. $−4d+3\text{ if }d=−1$

Substitute $−1$ for $d$.

$−4(−1) + 3$

Simplify the terms and combine them.

$4 + 3 = 7$

$7$

1. $k − m \text{ if } k = 4 \text{ and } m = −10$

Follow the steps in part (a).

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

$(4) − (−10)$

1. $\frac{t}{w}\text{ if }t=6\text{ and }w=−3$

Follow the steps in part (a).

$−2$

1. $x^2+y^2\text{ if }x=7\text{ and }y=5$

Follow the steps in part (a).