SOLUTION: Dan drives 300 miles to attend college on the drive back home his average speed decreases by 10 miles per hour.. write an equation that gives the total driving time t ( in hou

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Question 356843: Dan drives 300 miles to attend college on the drive back home his average speed decreases by 10 miles per hour..

write an equation that gives the total driving time t ( in hours ) as a function of average speed r ( in miles per hour ) when driving to college ..

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi,

distance = rate*time or time = distance/rate

*Let T be the total driving time to and from college

T= 300/r + 300/(r-10)

.