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: 19

Answer

$(1,2)$.

Work Step by Step

First equation $2x+y=4$. Plug $y=0$ into the equation. $2x+0=4$ $2x=4$ $x=2$ $x-$ intercept $A=(2,0)$. Plug $x=0$ into the equation. $2(0)+y=4$ $0+y=4$ $y=4$ $y-$ intercept $B=(0,4)$. Now for the second equation $4x+3y=10$. Plug $y=0$ into the equation. $4x+3(0)=10$ $4x+0=10$ $4x=10$ $x=\frac{10}{4}$ $x=\frac{5}{2}$ $x-$ intercept $C=(\frac{5}{2},0)$. Plug $x=0$ into the equation. $4(0)+3y=10$ $0+3y=10$ $3y=10$ $y=\frac{10}{3}$ $y-$ intercept $D=(0,\frac{10}{3})$. 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 $(1,2)$.
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