At a 3mile crosscountry race an athlete runs 2 miles at 8 mp

At a 3-mile cross-country race an athlete runs 2 miles at 8 mph and 1 mile at 10 mph. What is the athlete\'s average speed?

2/8+1/10
(2*10+1*8)/8*10)
(20+8)/80
28/80=.35 hours for the race.
3/.35=8.57 mph. was the average speed.

$At a 3-mile cross-country race an athlete runs 2 miles at 8 mph and 1 mile at 10 mph. What is the athlete\'s average speed?Solution2/8+1/10 (2*10+1*8)/8*10) (20$