Can somebody help me

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

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.

Which expression represents the total perimeter of her sandwich, and if x = 1.2, what is the approximate length of the crust?