posted by Ellie .
during a match, pat kicks a football onto the roof of the stand. The stand and the path of the ball are at righ angles to each other.
The path of the ball is given by y=2.5x-x^2÷15
The roof of the stand is given by y=x÷2+48 ÷5, where 18</=x</=40. All demensions are in metres. The origin is where pat kicks the ball from.
1.Find the height of the ball when it hits the roof of the stand for the first time.
we are very sorry but this can not be answered