Answer:
The required expression is : 150 + 21·m
Step-by-step explanation:
The initial miles on the odometer = 150 miles
Total time of trip = 3 weeks
= 3 × 7 = 21 days
No. of miles traveled each day = m miles
So, during whole trip no. of miles traveled by Jim = m × 21 miles
Therefore, expression for mileage will be : miles initially on the odometer + miles traveled during the trip
Therefore, Expression is 150 + 21·m
