Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 8 - Coordinate Geometry and Linear Systems - 8.2 - Graphing Linear Equations - Concept Quiz 8.2 - Page 341: 5



Work Step by Step

To find the $x$-intercept of an equation of a graph, we plug in $0$ for $y$ and solve for $x$. We plug in $0$ for $y$ and apply the principles of equivalency to solve the equation for $x$: $$3x+4y=-12$$ $$3x+4(0)=-12$$ $$3x=-12$$ $$\frac{3x}{3}=-\frac{12}{3}$$ $$x=-4.$$ Since $x=-4$, the statement is true.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.