SOLUTION: Dave,Joe,and Sabrina were assigned the job of cataloging the music for their school band.Dave could have completed the assignment in 2 hours alone,Joe in 3 hours, and Sabrina in 4

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Dave,Joe,and Sabrina were assigned the job of cataloging the music for their school band.Dave could have completed the assignment in 2 hours alone,Joe in 3 hours, and Sabrina in 4       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



Question 904803: Dave,Joe,and Sabrina were assigned the job of cataloging the music for their school band.Dave could have completed the assignment in 2 hours alone,Joe in 3 hours, and Sabrina in 4 hours.They started work together, but Joe left at the end of a half-hour and Sabrina at the end of an hour. How long did Dave work alone to finish the cataloging?

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
a=2 b=3 c=4
.5/2+1/3+z/4=1
1/4+1/3+z/4=1
7/12+z/4=1
z/4=5/12
z=20/12
z = 1.66667