To this day - I still do not have a fast method of doing VICS rates and work. I know to pick numbers - but I always end up picking really bad #'s. Can someone walk me through a method - to conquer this. It would probably take me 3.5 - 4 minutes to do this problem and I would like to do it in 2.5 if not 2.
During a trip, Francine traveled x percent of the total distance at an average speed of 40 miles per hour and the rest of the distance at an average speed of 60 miles per hour. In terms of x, what was Francine’s average speed for the entire trip?
A. (180 - x) / 2
B. (x+60) / 4
C. (300 - x) / 5
D. (600) / 115 - x
E. (12000) / x+200
(E)
During a trip, Francine traveled x percent of the total distance at an average speed of 40 miles per hour and the rest of the distance at an average speed of 60 miles per hour. In terms of x, what was Francine’s average speed for the entire trip?
A. (180 - x) / 2
B. (x+60) / 4
C. (300 - x) / 5
D. (600) / 115 - x
E. (12000) / x+200
(E)
