27. 20 miles (if it travels 40 miles in one hour and thirty minutes is half of an hour you take half of the distance.)
28. 3 MPH because 6 miles in 2 hours is 3 miles in 1 hour (divide)
29. 120 miles (if he can go 60 miles in one hour than multiply 60 but two to see how far he can go in two hours aka 60 times 2)
30. 4 miles (2 mph times 2 hours)
31. 10 (50-10 equals 40 and 40 divided by 4 equals 10)
32. 10 (40-30 equals 10 and 10 divided by 1 is 10)
