Answer:
78
Step-by-step explanation:
x = your age
400 - 2x = 244
subtract 400 from both sides of the equation:
-2x = -156
divide both sides by -2:
x = 78
10.49 It was really 10.4880884817 but 8 rounds it up to 10.49
Vehicle B need fewer repairs on average, but the number of repairs per vehicle has greater variation