Find Coordinates of Point P in Analytic Geometry

[zafer]

Homework Statement

In the figure, the orange line and the green line are perpendicular and intersect on the x-axis.Find the coordinates of P.

http://tinypic.com/r/2wn7m2v/3 go here for the image please.

Homework Equations

slope-point formula, m1*m2=-1 FOR PERPENDICULAR LINES

The Attempt at a Solution

I found the slope of the orange line and also for the other line.
the point there is (0,y).Which is the y-intercept.

 

[statdad]

What kind of triangle is formed by the figure? What can you do with that information? (I'm trying to give a hint for one approach - there are certainly others).