The equation y=464-8x describes the altitude y in feet of a plane x seconds after it begins it's descent how many seconds will it take the plane to land.

Question

This is a hard q old help I'm in 7the grade

 

Answer 1

The plane lands when y = 0. So if you set 464 - 8x = 0 and solve for x, you will get the answer (58 seconds).