What is the solution set of the quadratic inequality

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

Which of the following can be used to explain a statement in a geometric proof?

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *