Aplane can travel 480 mph with the wind and 400 miles per hour against the wind find the speed of the wind and the speed of the plane in still air. me its urgent

440 mph would be the speed of the plane in still air.

Step-by-step explanation:

Note that with wind, a plane can travel 480. Against wind, it is 400. This means that if there is no wind, technically the amount would be in the middle of the two numbers given. Find the mean:

(480 + 400)/2 = Answer

Answer = (880)/2

Answer = 440

440 mph would be the speed of the plane in still air.

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correct answer:

a + bi

answer: -2+√x,-2-√x

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