SOLUTION: Malik drove his car for 45 miles at an average speed of r miles per hour. On the return trip, traffic has increased, and Malik's average speed is 3/4 r. The round trip took a total

Question 948110: Malik drove his car for 45 miles at an average speed of r miles per hour. On the return trip, traffic has increased, and Malik's average speed is 3/4 r. The round trip took a total of 1 hour and 45 minutes. Set up a system of equations to find the average speed for each portion of the trip.
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
RT=D for rate time distance;
45 minutes is hour.

___________________rate__________time_________distance
GOING_______________r____________(____)________d
RETRNG_____________(3/4)r_______(_____)________d
TOTAL___________________________

Fill the missing time cells.
Note that given is d=45 miles.

___________________rate__________time_____________distance
GOING_______________r___________________________45
RETRNG_____________(3/4)r______________45
TOTAL___________________________

Form and solve the time-sum equation.

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