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30 (miles) times 4 (hours) equals to 120 miles. 400 miles minus 120 miles equals 280 miles (distance the other car has driven). 280 divided by 4 (because we want to find the speed for only one hour) equals 70 miles.
The average speed of the other car is 70 mph
Answer:
x= -3
Step-by-step explanation:
2x+14= 8
2x= -6
x = -3
Answer: 6 vans
Step-by-step explanation: one of the vans would only have 6 people