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 - Mid-Chapter Check Point - Page 220: 9

Answer

$(3,2)$.

Work Step by Step

First equation $2x-y=4$. Plug $y=0$ into the equation. $\Rightarrow 2x-0=4$ $\Rightarrow 2x=4$ $\Rightarrow x=2$ x− intercept is $A=(2,0)$. Plug $x=0$ into the equation. $\Rightarrow 2(0)-y=4$ $\Rightarrow 0-y=4$ $\Rightarrow -y=4$ $\Rightarrow y=-4$ $y−$ intercept $B=(0,-4)$. Now second equation $x+y=5$. Plug $y=0$ into the equation. $\Rightarrow x+0=5$ $\Rightarrow x=5$ $x−$ intercept $C=(5,0)$. Plug $x=0$ into the equation. $\Rightarrow 0+y=5$ $\Rightarrow y=5$ $y−$ intercept $D=(0,5)$. Draw two lines using intercept points. Graph is shown below in the image. The intersection point of both lines is the solution. Here we have the intersection point at $(3,2)$.
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