College Algebra (10th Edition)

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

Chapter 3 - Cumulative Review: 9


$x\leq-2\ x\geq\frac{3}{2}$ Interval: $(-\displaystyle \infty,-2]\cup[\frac{3}{2},\infty)$

Work Step by Step

We solve: $|4x+1|\geq 7$ $4x+1\leq-7$ or $4x+1\geq 7$ $4x\leq-7-1$ or $4x\geq 7-1$ $4x\leq-8$ or $4x\geq 6$ $x\leq-2\ x\geq\frac{3}{2}$ Interval: $(-\displaystyle \infty,-2]\cup[\frac{3}{2},\infty)$
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