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: 23

Answer

$[0,2)$. The graph is shown below.

Work Step by Step

The given compound inequality is $x-1\leq 7x-1$ and $4x-7\lt 3-x$. Solve each inequality separately. $\Rightarrow x-1\leq 7x-1$ and $4x-7\lt 3-x$. $\Rightarrow x-1+1\leq 7x$ and $4x\lt 3-x+7$. $\Rightarrow x+0\leq 7x$ and $4x\lt 10-x$. $\Rightarrow 0\leq 7x-x$ and $4x+x\lt 10$. $\Rightarrow 0\leq 6x$ and $5x\lt 10$. $\Rightarrow 0\leq x$ and $x\lt 2$. 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. $0\leq x$ as $[0,\infty)$ and $x\lt 2$ as $(-\infty,2)$ The intersection is $(-\infty,2)\cap[0,\infty)=[0,2)$.
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