The distance between (-2,2) (-8,-6)

Write a story that matches with the expression 42x-5 pls hurry

How do you solve a question like this?

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.