Nikes cost $75.
They were reduced to $60. What is the percent of change?

Can (2,3 and square root 10) be sides ona right triangle?

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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. what distance from city a is the point where the truck and the car will meet?