An aircraft travels with the wind for 120 miles in 0.75 of an hour. The return trip is flown against the wind and takes exactly 1 hour. Which system of linear equations represents x, the speed of the plane in miles per hour, and y, the speed of the wind in miles per hour? Recall the formula d = rt. A O 0.75(x + y) = 120 x - y = 120 O 0.75(x - y)= 120 x + y = 120 120(x + y) = 0.75 120(x - y) = 1 0 120(x - y) = 0.75 120(x + y) = 1