Round each number to the nearest thousand.   which is the best estimate for the sum of 472,378 + 178,261?

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

Find the distance between (0,5) & (-4,2)

Which of the following contains a variable?