Question 1003705
Brian drives 117 miles to the city. On the drive back home, his average speed decreases by 6 miles per hour. 
Write two equations (for time, in hours) to the city and back home where "r" is the average speed (in miles per hour) when driving to the city. 
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To city DATA:
distance = 117 miles ; rate = r mph ; time = d/r = 117/r hrs
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From city DATA:
distance = 117 miles ; rate = r-6 mph ; time = 117/(r-6) hrs
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Equations:
Time to city = 117/r hrs
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Time from city = 117/(r-6) hrs
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Cheers,
Stan H.
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