Please solve this surface area

Do not comment if you aren’t going to . create a real-life situation and create a system and show how it might be modeled algebraically with a system of equations (or inequalities) show all work include a few sentences explaining the situation, your variables of choice and what each represents, and how you would set it up and solve it algebraically. !

Use set buikder notation to represent the following set: {, -2, -1, 0}

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?