Answer:
I think Brendan is 22? I'm not sure and im 70% sure im wrong!
Sorry!
Answer:
38 mpg
Step-by-step explanation:
Initial efficiency = 39 mpg
Initial speed = 40 mph
Final speed = 50 mph
The efficiency drop between 40 mph and 50 mph is given by:

The total efficiency drop from 40 to 50 mph is:

Therefore, the efficiency at 50 mph is:

Answer:
I asked my teacher is she could help me and she said it was -7+10=3. Step-by-step explanation: