SOLUTION: A bus leaves Johnstown at noon heading for Djibouti, 350 miles away. A bus leaves Djibouti at the same time, heading to Johnstown at 35 m.p.h. If the two buses meet at 7 PM, what i

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A bus leaves Johnstown at noon heading for Djibouti, 350 miles away. A bus leaves Djibouti at the same time, heading to Johnstown at 35 m.p.h. If the two buses meet at 7 PM, what i      Log On


   

Question 305257: A bus leaves Johnstown at noon heading for Djibouti, 350 miles away. A bus leaves Djibouti at the same time, heading to Johnstown at 35 m.p.h. If the two buses meet at 7 PM, what is the rate of the first bus?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
given:
d%5B1%5D+%2B+d%5B2%5D+=+350
They both travel for 7 hrs
Bus 1:
d%5B1%5D+=+r%5B1%5D%2A7
Bus 2:
d%5B2%5D+=+35%2A7
d%5B2%5D+=+245
d%5B1%5D+=+350+-+d%5B2%5D
d%5B1%5D+=+350+-+245
d%5B1%5D+=+105
and
d%5B1%5D+=+r%5B1%5D%2A7
105+=+7r%5B1%5D
r%5B1%5D+=+15 mi/hr