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 - Page 327: 1

Answer

The lines intersect at (2,6).
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Work Step by Step

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