College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 1 - Section 1.5 - Solving Inequalities - 1.5 Assess Your Understanding - Page 128: 55

Answer

$(-\infty, 4)$ Refer to the image below for the graph.
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Work Step by Step

Subtract 1 from each side of the inequality to obtain: $\begin{array}{ccc} &x+1-1 &\lt &5-1 \\&x &\lt &4 \end{array}$ Thus, the solution set is $(-\infty, 4)$. To graph this on a number line. plot a hollow dot at $4$, then shade the region to its left.
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