Precalculus (6th Edition)

by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie

Published by Pearson

ISBN 10: 013421742X

ISBN 13: 978-0-13421-742-0

Chapter 2 - Graphs and Functions - 2.5 Equations of Lines and Linear Models - 2.5 Exercises - Page 247: 74

Answer

$\{ 10\}$

Work Step by Step

Step 1. Graph $y=-2(2x+6)$ as shown in the figure (red). Step 2. Graph $y=-4x+8-2x$ as shown in the figure (blue). Step 3. The solution will be outside a standard viewing window of $[-10,10]$, zoom out and find the intersect at $(10,-52)$ Step 4. The solution set is $\{ 10\}$

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