Mary takes a sightseeing tour on a helicopter that can fly 450 miles against a 35 mph headwind. In the same amount of time it can travel 702 miles with a 35 mph tailwind. Find the speed of the helicopter.

Answer:V = 160mphStep-by-step explanation:We need to start from the formula of speed: V=d/tWe have two travels, with and against the wind, both done in the same time.Clearing t from the formula, we will have: t=d/V2450miles/V-35mph (speed of the wind is subtracted)702miles/V+35mph (speed of the wind is subtracted)Now, we find V:450miles/V-35mph = 702miles/V+35450*V+35 = 702*V-35450V+15,750 = 702V-24,570702V-450V = 15,750 + 24,570252V = 40,320V = 40,320/252V = 160mph