Evaluate 8r-rs8r−rs8, r, minus, r, s when r=6r=6r, equals, 6 and s=5s=5s, equals, 5.

I'm terrible at math any here is appreciated.

You have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint? you have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0