Answer:
Mr. Cooper rode 21.5 miles away from his house, then he rode back toward his house 6.2 miles. Then he rode away from his house for another 3.8 miles.
21.5 miles - 6.2 miles = 15.3 miles
15.3 miles + 3.8 miles = 19.1 miles
Mr. Cooper is 19.1 miles away from his house.
Explanation: