Answer:
the answer i got was a=−8b+24/b
Step-by-step explanation:
hoped I helped:)
Answer:
(a) 
Step-by-step explanation:
Given


Required
Determine the time in each lap
The unit time in each lap is calculated by dividing the total time by the number of laps; i.e.;

Substitute values for Time and Lap

Collect like terms:
(7x+4x)−2y
Simplify:
11x-2y