Flying to Tokyo with a tailwind a plane averaged 305 mph. On the return trip the plane only averaged 275 mph while flying back into the same wind. Find the speed of
the plane in still air and the speed of the wind.

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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. how many hours after the truck's departure will the two meet?

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length