Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 9 - Review - Page 673: 32

Answer

Please see the graph.

Work Step by Step

Red line: $4x-y\le0$ Blue line: $3x-2y\ge-5$ Green line: $y\ge-4$ To determine what sides of the lines to shade, we use a point not on the line. We can use (1,1) for the lines. Red line: $4x-y\le0$ $4*1-1\le0$ $4-1\le0$ $3\le0$ (false, so we shade the left side of the line) Blue line: $3x-2y\ge-5$ $3*1-2*1\ge-5$ $3-2\ge-5$ $1\ge-5$ (true, so we shade the right side of the line) Green line: $y\ge-4$ $1\ge-4$ (true, so we shade above the line) The solution area is the overlap of the three inequalities. The boundary points of the solution area are $(-4.333,-4$, $(-1,-4)$, and $(1,4)$.
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