Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 2 - Section 2.5 - Compound Inequalities - Exercise Set - Page 94: 23


$(4, 10)$

Work Step by Step

First, solve each simple inequality to have: Inequality 1: $-2x \lt -8 \\x \gt \frac{-8}{-2} \\x \gt 4$ Inequality 2: $x-5 \lt 5 \\x \lt 5+5 \\x \lt 10$ Thus, the given compound inequality is equivalent to $x \gt 4$ and $x \lt 10$. $x \gt 4$ includes all the numbers to the right of $4$. $x \lt 10$ includes all the numbers to the left of $10$. The compound inequality involves the conjunction AND, which means that the solution will be the set that contains the numbers that are common to both sets. The numbers that are common to both sets are the ones to the right of $4$ but to the left 10. Therefore, the solution is $(4, 10)$
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