Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 6 - Cumulative Review - Page 407: 20

Answer

the solution set are the shaded areas

Work Step by Step

Using a table of values, the graph of \begin{array}{l}\require{cancel} 2x+y=4 \\ y=-2x+4 ,\end{array} is determined (RED graph). Using the testpoint, $ (0,0) ,$ then \begin{array}{l}\require{cancel} 2x+y\le4 \\ 2(0)+0\le4 \\ 0+0\le4 \\ 0\le4 \text{ (TRUE)} .\end{array} Since the solution above ended with a $\text{ TRUE }$ statement, then the testpoint is $\text{ INCLUDED }$ in the area of the solution set. The graph of $ y=2 $ is the horizontal line passing through $ (0,2) .$ The graph of $ y\gt2 $ is the area above the graph of $ y=2 $ (BLUE graph). A solid line is used for the symbols $\le$ and $\ge,$ while a dotted line is used for the symbols $\gt$ and $\lt.$ Since "or" is used, the solution set are the shaded areas.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.