Need with this question (-2x+3a-6)+(-5x-7a)

Chose the graph below that represents the following system of inequality’s

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.

Jimmy can run 3.5 miles in 20 minutes. how far can ne run in one hour and ten minutes?