Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 9 - Section 9.1 - Solving Pairs of Linear Equations by Graphing - Exercises: 3

Answer

(-1,1)

Work Step by Step

Find and graph 3 points for each equation. $\underline{\ x\ \ \ \ \ \ \ \ \ \ \ -x\ \ \ \ \ \ \ \ \ \ \ \ \ y\ \ }$ $-1\ \ \ \ \ \ \ -(-1)\ \ \ \ \ \ 1$ $\ \ \ 0\ \ \ \ \ \ \ \ \ -(0)\ \ \ \ \ \ \ \ \ 0$ $\ \ \ 5\ \ \ \ \ \ \ \ \ -(5)\ \ \ \ \ \ \ \ \ \ \ \ \ \ -5$ $y-x=2$ $y-x+x=2+x$ $y=x+2$ $\underline{\ x\ \ \ \ \ \ \ \ \ \ \ \ x+2\ \ \ \ \ \ \ \ \ \ y}$ $3\ \ \ \ \ \ \ \ \ \ \ \ \ 3+2\ \ \ \ \ \ \ \ \ \ \ 5$ $0\ \ \ \ \ \ \ \ \ \ \ \ \ 0+2\ \ \ \ \ \ \ \ \ \ \ 2$ $-6\ \ \ \ \ \ \ -6+2\ \ \ \ -4$ The lines intersect where x=-1 and y=1. When $x=-1, -(-1)=1.$ When $x=-1, -1+2=1$$.
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