Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 1, Equations and Inequalities - 1.3 Solve Linear Equations - 1.3 Exercises - Problem Solving - Page 24: 77


Answer B

Work Step by Step

Let x = time working together One writes 7 names in 6 minutes: $\frac{7}{6}x$ Another writes 17 names in 10 minutes $\frac{17}{10}x$ The third writes 23 names in 15 minutes: $\frac{23}{15}x$ If they work together: $\frac{7}{6}x+\frac{17}{10}x+\frac{23}{15}x=440$ $\frac{35x+51x+46x}{30}=440$ $35x+51x+46x=13200$ $132x=13200$ $x=100$ The correct answer is B.
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.