What is an equation of the parabola with vertex at the origin and focus (-5,0)?

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.

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.

The statement tan theta= -12/5, csc theta=-13/12, and the terminal point determained by theta is in quadrant two