Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 3 - Review Exercises - Page 248: 5

Answer

$\{(-5,-6)\}$.

Work Step by Step

First equation $y=\frac{3}{5}x-3$. Plug $y=0$ into the equation. $\Rightarrow (0)=\frac{3}{5}x-3$ $\Rightarrow -\frac{3}{5}x=-3$ $\Rightarrow x=5$ $x−$ intercept is $A=(5,0)$. Plug $x=0$ into the equation. $\Rightarrow y=\frac{3}{5}(0)-3$ $\Rightarrow y=-3$ $y−$ intercept is $B=(0,-3)$. Second equation $2x-y=-4$. Plug $y=0$ into the equation. $\Rightarrow 2x-(0)=-4$ $\Rightarrow 2x=-4$ $\Rightarrow \frac{2x}{2}=\frac{-4}{2}$ $\Rightarrow x=-2$ $x−$ intercept $C=(-2,0)$. Plug $x=0$ into the equation. $\Rightarrow 2(0)-y=-4$ $\Rightarrow -y=-4$ $\Rightarrow y=4$ $y−$ intercept $D=(0,4)$. Draw two lines using intercept points. The intersection point is $E=(-5,-6)$ Hence, the solution set is $\{(-5,-6)\}$.
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