Homework Help: pre-algebra..7th grade

Posted by pam on Sunday, February 24, 2008 at 2:27pm.

Story Problem
Some friends are recording songs on a CD. The first 1/5 of the CD has Alex's songs.The next 12 minutes of songs are Henrique's. 1/3 of the time is Brian's songs. Sally has 32 minuites. How many minutes of music are there in all?

pre-algebra..7th grade - Quidditch, Sunday, February 24, 2008 at 3:28pm
If we add up everybody's time, we should get the total time of the CD.
Let M represent the total time of the CD. Everything will be in minutes.

M= (1/5)*M + 12 + (1/3)*M + 32
Combining terms...
(1 - 1/5 - 1/3)*M=44
Solve for M
- pre-algebra..7th grade - pam, Sunday, February 24, 2008 at 5:19pm
  Thank you. We came up with 94 2/7 which is approximately 94mins, 17 secs.
  - pre-algebra..7th grade - Quidditch, Sunday, February 24, 2008 at 6:52pm
    Good!
    That is what I got, also.
pre-algebra..7th grade - Ryan, Monday, August 25, 2008 at 10:46pm
the quotient of eight and twice a number
pre-algebra..8th grade - caleb causey, Thursday, September 11, 2008 at 5:54pm
I need help withrational numbers

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