Algebra: A Combined Approach (4th Edition)

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

Chapter 13 - Test - Page 966: 14

Answer

Please see the graph.

Work Step by Step

Red line: $x^2/4 + y^2 \leq1$ Blue line: $x + y >1$ The blue line will be dotted (since it uses a greater than sign), and the red line will be solid (since it uses a less than or equal to sign). We pick the point $(0,0)$ to determine what sides of the graph to shade. $x^2/4 + y^2 \leq1$ $0^2/4 + 0^2 \leq1$ $0/4 + 0 \leq 1$ $0 + 0 \leq 1$ $0 \leq 1$ (true, so we shade the side of the graph with this point) $x+y>1$ $0 + 0 > 1$ $0 > 1$ (false, so we shade the side of the graph without the point) The overlap of the two graphs is the solution set for the set of inequalities.
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