SOLUTION: Noah is trying to qualify for a race. A driver needs to complete 8 laps of a seven-mile track at an average speed of 105.66 mph to qualify. Noah has already completed the first thr

Question 329411: Noah is trying to qualify for a race. A driver needs to complete 8 laps of a seven-mile track at an average speed of 105.66 mph to qualify. Noah has already completed the first three laps. His average speed so far is ninety-two mph. What must his average speed be for the rest of the race to qualify?
Any help with this will be greatly appreciated
Thanks!!!
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Let A-H be the speed for each of his qualifying laps.
For the first 3 laps,

.
.
.
The average for all 8 laps,

.
.
So then the average for the last 5 laps must be,
mph
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