College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 5 - Systems of Equations and Inequalities - Exercise Set 5.5 - Page 571: 42

Answer

The system has no solutions.

Work Step by Step

We will graph the solution region for each inequality. To graph a line, we need two points.... unless we know it is vertical or horizontal 1. (red) $x+y=3 \quad $dashed line ( sign is $> )$, x-intercept:$\quad x+0=3\quad$ point: ($3,0)$ y-intercept:$ \quad 0+y=3\quad$ point: ($0,3)$ Testing (0,0):$\quad (0)+(0) > 3 \quad ?$ No, shade the region not containing (0,0) 2 (blue) $x+y=-2 \quad $dashed line ( sign is $< )$, x-intercept:$\quad x+0=-2\quad$ point: ($-2,0)$ y-intercept:$ \quad 0+y=-2\quad$ point: ($0,-2)$ Testing (0,0):$\quad 0+0 < -2 \quad ?$ No, shade the region not containing (0,0) The solution set should be the region with BOTH shadings. There is no region with both shadings here. The solution set is empty, $\emptyset.$ The system has no solutions.
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