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 - Section 3.1 - Systems of Linear Equations in Two Variables - Exercise Set - Page 190: 23

Answer

No solution.

Work Step by Step

First equation $3x+y=3$. Plug $y=0$ into the equation. $\Rightarrow 3x+(0)=3$ $\Rightarrow 3x=3$ $\Rightarrow \frac{3x}{3}=\frac{3}{3}$ $\Rightarrow x=1$ $x−$ intercept $A=(1,0)$. Plug $x=0$ into the equation. $\Rightarrow 3(0)+y=3$ $\Rightarrow y=3$ $y−$ intercept $B=(0,3)$. Second equation $6x+2y=12$. Plug $y=0$ into the equation. $\Rightarrow 6x+2(0)=12$ $\Rightarrow 6x=12$ $\Rightarrow \frac{6x}{6}=\frac{12}{6}$ $\Rightarrow x=2$ $x−$ intercept $A=(2,0)$. Plug $x=0$ into the equation. $\Rightarrow 6(0)+2y=12$ $\Rightarrow 2y=12$ $\Rightarrow \frac{2y}{2}=\frac{12}{2}$ $\Rightarrow y=6$ $y−$ intercept $B=(0,6)$. Draw two lines using intercept points. Both lines are parallel. Hence, we have no solution.
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