Intermediate Algebra: Connecting Concepts through Application

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

Chapter 3 - Exponents, Polynomials and Functions - 3.2 Combining Functions - 3.2 Exercises - Page 244: 35

Answer

$-4x+16$

Work Step by Step

The student changed the subtraction operator to multiplication operator by placing the minus sign inside the parenthesis. The correct simplified expression of $ (2x+7)-(6x-9) ,$ is \begin{array}{l}\require{cancel} 2x+7-6x+9 \\\\= 2x+7-6x+9 \\\\= (2x-6x)+(7+9) \\\\= -4x+16 .\end{array}
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.

GradeSaver will pay $15 for your literature essays
GradeSaver will pay $25 for your college application essays
GradeSaver will pay $50 for your graduate school essays – Law, Business, or Medical
GradeSaver will pay $10 for your Community Note contributions
GradeSaver will pay $500 for your Textbook Answer contributions