What is the solution to x + 2 = 9?

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Acylinder with a base diameter of x units has a volume of jxcubic units which statements about the cylinder are true? check all that apply. the radius of the cylinder is 2 x units. the radius of the cylinder is 2x units. the area of the cylinder's base is 200 square units. the area of the cylinder's base is a square units. the height of the cylinder is 2x units. the height of the cylinder is 4x units. mark this and return save and exit next submit

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b