Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 4 - Section 4.2 - Compound Inequalities - Exercise Set - Page 272: 15

Answer

$(-6,-4)$. The graph is shown below.

Work Step by Step

The given compound inequality is $5x\lt-20$ and $3x\gt-18$. Solve each inequality separately. $\Rightarrow 5x\lt-20$ and $3x\gt-18$. $\Rightarrow x\lt-4$ and $x\gt-6$. First graph then take the intersection of the solution sets of the two inequalities. The graph is shown in the image file. We can write the compound inequality. $x\lt-4$ as $(-\infty,-4)$ and $x\gt-6$ as $(-6,\infty)$ The intersection is $(-\infty,-4)\cap(-6,\infty)=(-6,-4)$.
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