12/y +9 at y =6 solve

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.