Cashapping whoever do all of em!

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

3women sell hats at a craft fair weekly. the money they make at the fair is split into categories. 9% goes to pay taxes. $55 goes to pay rent for the space they sell in. the rest is split between the women. if the group make $706 at the fair, how much does each women get paid once the money is divided

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?