Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 1-8 - Cumulative Review - Page 678: 29

Answer

See graph

Work Step by Step

Given $$\begin{cases} 4 x-6 y & >3 \\ y & >-2 x+5. \end{cases}$$ Rewrite the first inequality so that $y$ is a function of $x$. \begin{equation} \begin{aligned} 4 x-6 y &> 3\\ -6y&> 3-4 x\\ 6y&< 4 x-3\\ y&< \frac{4}{6}x-\frac{3}{6}\\ y& <\frac{2}{3}x-\frac{1}{2}. \end{aligned} \end{equation} Now, graph the following functions with a dashed line each and shade the appropriate areas where the inequalities are satisfied. \begin{equation} \begin{aligned} y&=-2 x+5\\ y&=\frac{2}{3}x-\frac{1}{2}\\ \end{aligned} \end{equation} See the graph below. The set of inequality is satisfied in the region between the two graphs.
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