Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 5 - Solving Systems of Linear Equations - 5.1 - Solving Systems of Linear Equations by Graphing - Exercises - Page 239: 15

Answer

The solution is $(-9,-1)$.

Work Step by Step

The given system of linear equation is $y=\frac{1}{3}x+2$ ...... (1) $y=\frac{2}{3}x+5$ ...... (2) Graph each equation. The intersection point is $(-9,-1)$. Check the intersection point. Equation 1: $\Rightarrow y=\frac{1}{3}x+2$ $\Rightarrow -1=\frac{1}{3}(-9)+2$ $\Rightarrow -1=-3+2$ $\Rightarrow -1=-1$ True. Equation 2: $\Rightarrow y=\frac{2}{3}x+5$ $\Rightarrow -1=\frac{2}{3}(-9)+5$ $\Rightarrow -1=-6+5$ $\Rightarrow -1=-1$ True. The solution is $(-9,-1)$.
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