Rambo "The Daredevil" jumped off a skyscraper 360 feet above the ground with a parachute on his back. He was falling freely at amout a meter per second while gravity was pulling him down changing his speed by about 4.9 m/s per second. Suddenly, Rambo released his parachute at 142 meters from the ground. His fall slowed down to 4 meters per second.
Which of the following is a system of equations that could be used to figure out how long after Rambo jumped took him to release his parachute?

I know it seems like a lot but i know the answer i just need the work for it. The answer is

y=-4.9^2+360
y=-4x+142