Alba travels between the two mile markers shown and then finds her average speed in miles per hour. select the three equations that represent this situation. alba travels between the two mile markers shown and then finds her average speed in miles per hour. select the three equations that represent this situation. 210 miles=3.5 hours×speed speed/210 miles=3.5 hours 3.5 hours=210 miles/speed speed=210 miles/3.5 hours