Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 4 - Mid-Chapter Check Point - Page 286: 16

Answer

$(4,\infty)$.

Work Step by Step

The given compound inequality is $5x+1\geq4x-2$ and $2x-3\gt5$. Solve each inequality separately. First $\Rightarrow 5x+1\geq4x-2$ Add $-4x-1$ to both sides. $\Rightarrow 5x+1-4x-1\geq4x-2-4x-1$ Simplify. $\Rightarrow x\geq-3$ Second. $\Rightarrow 2x-3\gt5$ Add $3$ to both sides. $\Rightarrow 2x-3+3\gt5+3$ Simplify. $\Rightarrow 2x\gt8$ Divide both sides by $2$. $\Rightarrow \frac{2x}{2}\gt\frac{8}{2}$ Simplify. $\Rightarrow x\gt4$ First graph then take the intersection of the two inequality. We can write the compound inequality. $x\geq-3$ as $[-3,\infty)$ and $x\gt4$ as $(4,\infty)$ The intersection is $[-3,\infty)\cap(4,\infty)=(4,\infty)$.
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