Homework Help: Algebra-HELP!!!!

Posted by Molly on Tuesday, June 19, 2012 at 6:10pm.

When Amy drives her car to work, the trip takes 1/2 hour. When she rides the bus, it takes 3/4 hour. The average speed of the bus is 12 mph less than her speed driving. Find the distance she travels to work.

Algebra-HELP!!!! - bobpursley, Tuesday, June 19, 2012 at 6:13pm
Let D be the distance to work.

D=Drivespeed*1/2

D=Busspeed*.75

so Bus*.75=Drivespeed*1/2
but bus=drivspeed-12

drivspeed*1/2=(.75)(drivspeed-12)
solve for drivespeed, then
distance=drivspeed*1/2

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