66x is the correct answer
The average speed = (speed 1 + speed 2)/2
the average speed = (80/10 + 100/20)/2
the average speed = (8 + 5)/2
the average speed = 13/2
the average speed = 6.5 km/minute
7.85 dollars because 3.14 is the price of one pound your buying 2.5 so you times 3.14 by 2.5
Answer:9
Step-by-step explanation: