Intercept of Two Equations: y^2.5=1-x^1.5 and y=(a/b)*x

Hello,

I have 2 equations and I have to find the intercept.  The equations are:

y^2.5=1-x^1.5

y=(Rs/Rt)*x

In this equation Rs and Rt are constants and we need the solutions that will make x and y to be in between 0 and 1.

I have been trying but I get a warning message that I dont understand.  Attach is a picture of what my code looks like.  Any help will be appreciated.