Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 2 - Systems of Linear Equations and Inequalities - 2.2 Solving Systems of Equations Using the Substitution Method - 2.2 Exercises - Page 154: 59

Answer

$(h,g)= (7,2)$ (consistent independent system)

Work Step by Step

Given $$\begin{cases} g+5h&= 37\\ 3g+4h&= 34. \end{cases}$$ Rewrite the first equation in its slope intercept form and substitute the result into the second and solve. $$\begin{aligned} g+5h&= 37\\ g&= -5h+37 \end{aligned}$$ and $$\begin{aligned} 3(-5h+37)+4h&= 34\\ -15h+4h+111&= 34\\ -11h&= 34-111\\ h&= \frac{77}{11}\\ &= 7. \end{aligned}$$ Now solve for $g$ using any of the above equations. $$\begin{aligned} g &= -5(7)+37\\ &= 2. \end{aligned}$$ The solution set is $(h,g)= (7,2)$ . The system is consistent and independent because it has a single solution.
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.