Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 2 - Solving Linear Inequalities - 2.4 - Solving Multi-Step Inequalities - Monitoring Progress - Page 75: 8

Answer

$ a\leq 2$ The graph is shown below.

Work Step by Step

The given inequality is $\Rightarrow 3(2a-1)\geq 10a-11$ Use distributive property. $\Rightarrow 6a-3\geq 10a-11$ Add $11$ to each side. $\Rightarrow 6a-3+11\geq 10a-11+11$ Simplify. $\Rightarrow 6a+8\geq 10a$ Subtract $6a$ from each side. $\Rightarrow 6a+8-6a\geq 10a-6a$ Simplify. $\Rightarrow 8\geq 4a$ Divide each side by $4$. $\Rightarrow \frac{8}{4}\geq \frac{4a}{4}$ Simplify. $\Rightarrow 2\geq a$ Hence, the solution is $ a\leq 2$. Use a close circle because $2$ is a solution. Shade the number line on the left side.
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