Which function has a vertex on the y-axis?
f(x) = (x - 2)2
f(x) = x(x + 2)
f(x) = (x − 2)(x + 2)
f(x) = (x + 1)(x - 2)

Need ! give step by step solutions on how to solve number one [tex]\frac{9-2\sqrt{3} }{12+\sqrt{3} }[/tex] number two [tex]x+4=\sqrt{13x-20}[/tex] number three (domain and range) [tex]f(x)=2\sqrt[3]{x} +1[/tex]

Aline has a slope of and a y-intercept of –2. what is the x-intercept of the line?

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.