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    Rate/Speed Equation: If a plane can travel 510 mph with the wind...?

    If a plane can travel 510mph with the wind, and 410 mph against the wind, find the speed of the plane in still air. Also, At the beginning of a walk, Roberto and Juanita are 8.8 miles apart. If they leave at the same time and walk in the same direction, Roberto overtakes Juanita in 11 hours...
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