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Elementary Algebra

Lynn Marecek, MaryAnne Anthony-Smith

$Math Studyset 91影视 Explanations$ Math

2nd Edition 路 1240 pages

ISBN: 9780998625713

Chapter 8: Q. 518 (page 1024)

In the following exercises, evaluate the rational expressions for the given values
$\frac{q^{2} - 5}{q + 3} when q = 7$

Short Answer

Expert verified

The value is $\frac{22}{5} .$

Step by step solution

01

Step 1. Given information.

The given rational expression is $\frac{q^{2} - 5}{q + 3} when q = 7 .$

02

Step 2. Substitution.

Substitute $q = 7 i n \frac{q^{2} - 5}{q + 3},$

We get,

$= \frac{{(7)}^{2} - 5}{(7) + 3} = \frac{49 - 5}{10} = \frac{44}{10} = \frac{22}{5}$

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Most popular questions from this chapter

Efraim wants to start simplifying the complex fraction $\frac{\frac{1}{a} + \frac{1}{b}}{\frac{1}{a} - \frac{1}{b}}$ by cancelling the variables from the numerator and denominator. Explain what is wrong with Efraim鈥檚 plan.

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