Priyanka's car gets a maximum of miles per gallon. According to a particular convention, the "wear" on a vehicle is at least times the total number of miles driven plus the total number of gallons used. For Priyanka's car, let be the total number of miles driven, let be the total number of gallons used, and let be the "wear". Which of the following systems of inequalities correctly represents these relationships?
1) ≥ +
2) ≤ +
3) ≥ +
4) ≤ +