Answer:
5.5 miles per hour
Step-by-step explanation:
Since he travels a total of 55 miles in 10 hours, you need to divide.
55/10 = 5.5
total hours/total miles = miles per hour
7 = 3t + 1
t = 6
....................
7 = 3t - 2t + 3
t = 4
ANSWER: 21 mm
EXPLANATION: valid
he sold it for $12.00