Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Appendix A - Review - A.9 Interval Notation; Solving Inequalities - A.9 Assess Your Understanding - Page A79: 24

Answer

$\text{(a)}\quad$ $0\gt -2$. $\text{(b)}\quad$ $-8\gt -10$. $\text{(c)}\quad$ $-9\gt -15$. ($\text{d)}\quad$ $6\lt 10$.

Work Step by Step

The given inequality is $\Rightarrow -3\gt -5$ (a) Add $3$ to each side. $\Rightarrow -3+3\gt -5+3$ Simplify. $\Rightarrow 0\gt -2$. (b) Subtract $5$ from each side. $\Rightarrow -3-5\gt -5-5$ Simplify. $\Rightarrow -8\gt -10$. (c) Multiply each side by $3$. $\Rightarrow 3\cdot (-3)\gt 3\cdot (-5)$ Simplify. $\Rightarrow -9\gt -15$. (d) Multiply each side by $-2$ and change the direction of the inequality. $\Rightarrow -2\cdot (-3)\lt -2\cdot (-5)$ Simplify. $\Rightarrow 6\lt 10$.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.