Answer:
18 laps
Step-by-step explanation:
5/6 of one minute is 50 seconds.
There are 3600 seconds in one hour, which means there are 900 seconds in 1/4 of an hour. (3600*1/4)
This would leave us with 900 seconds divided by 50 seconds per lap.
900/50=18
7(x+2)=91
7x+7.2=91
7x+14=91
7x =91-14
7x =77
x =77/7
x =11