Homework Help: Math 6th grade

Posted by Najmah on Tuesday, February 19, 2013 at 3:46pm.

Story Problem - Factoring
An "A" train leaves a subway station every 13 minutes. An "E" train leaves evry 9 minutes. If both trains just left the station on parallel tracts, when will both leave the station together again?

Math 6th grade - Steve, Tuesday, February 19, 2013 at 3:50pm
Since LCM(9,13) = 9*13 = 117
After 117 minutes,
9 A trains will have left,
13 E trains will have left
and then the cycle starts over.

Trains run on tracks, not tracts.
Math 6th grade - ashley, Tuesday, February 19, 2013 at 7:03pm
117minutes
Math 6th grade - Alissson, Tuesday, February 19, 2013 at 9:56pm
Since LCM(9,13) = 9*13 = 117
After 117 minutes,
9 A trains will have left,
13 E trains will have left
and then the cycle starts over.

Trains run on tracks, not tracts. ~Alisson~

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