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An airplane is preparing to land at an airport. It is 51,300 Feet above the ground and it is descending at a rate of 3100 feet per minute. At the same airport, another airplane is taking off and will ascend at the rate of 2600 feet per minute. When will the two airplanes be at the same altitude and what will the altitude be?

Respuesta :

Step-by-step explanation:

(51300 - 3100 x) = 2600x    where x is minutes

51300 = 5700x

x = 9 minutes   they will be at the same altitude  

   9 min * 2600 ft/ min = 23400 ft altitude