If Juan drives 50 mph for 1/2 hour then 60 mph for 1 1/2 an hour, what is his average speed?
50 m/h x .5 hr = 25 miles
60 m/h x 1.5 hr = 90 miles
total miles/totaltime = 115 m/ 2 hr = 57.5 m/hr avg
+37146 
