University Calculus: Early Transcendentals (3rd Edition)

Published by Pearson
ISBN 10: 0321999584
ISBN 13: 978-0-32199-958-0

Chapter Appendices - Section A.1 - Real Numbers and the Real Line - Exercises - Page AP-6: 4

Answer

$x\displaystyle \leq\frac{5}{4}$

Work Step by Step

Apply rules from the table "Rules for Inequalities" $ 5x- 3 \leq 7-3x\qquad$ ... add $ 3x+3\quad$ (rule 1) $5x+3x \leq 7+3$ $8x\leq 10\qquad $.... multiply with $ c=\displaystyle \frac{1}{8}\quad$ (positive, rule 3) $x\displaystyle \leq\frac{10}{8}$ $x\displaystyle \leq\frac{5}{4}$ This inequality describes a closed interval, $x\displaystyle \in(-\infty,\frac{5}{4}]$ See table: "Types of intervals."
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