$30 is a flat rate charged just for showing up, so that value is constant and will not change. $15 is the per hour charge, so the total charge will be $30 plus $15 for every hour the tech is there. The $15 is a constant charge per hour, so let x or h represent the number of hours the tech is there, so the total cost is c = 15h + 30 Every time h increases by 1, the total cost goes up by $15.
2000 Pounds in a ton. 1.5 is 1 and a half. 2000/2 = 1000. 2000 + 1000 = 3000. 1.5 tons = 3k pounds. You reduce the weight of the car by 300 pounds. 3000 - 300 = 2700. Your car weighs 2,700 pounds. 2,700 pounds is also equal to 1.35 tons