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Christie pilots her plane for 300 mi against a headwind in 3 hrs. The flight would...

Christie pilots her plane for 300 mi against a headwind in 3 hrs. The flight would take 2 hrs and 30 mins with a tailwind of the same speed. Find the headwind and the speed of the plane in still air. The speed of the headwind on the plane is __ mph and the speed of the plane in still air is ___ mph.

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