A truck driver averages 45 miles per hour while delivering freight and 60 miles per hour on the return trip. The total drive time is 7 hours. How long does each trip take?

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delivering 180/45 = 4 hours and return trip 180/60 = 3 hours

Step-by-step explanation:

d = unknown number to calculate each trip

+ = 7

find common denominator (45 * 60 = 2700)

()*() +( )*() =7

+ =7

=7

= 7

105d = 7 * 2700

105d = 18,900

d = 18900/105

d = 180

delivering 180/45 = 4 hours

return trip 180/60 = 3 hours

g

step-by-step explanation: