How do air masses cause weather changes?

Air masses have the properties of the land below it. Because of this, different temperature air masses colliding can cause high or low pressure. High pressure usually causes cool sunny days, low pressure usually causes warm cloudy/rainy days.

Your car broke down and the final bill was 261.50 the part that was replaced cost 99 and the charge for the mechanics labor is 65 per hour write an inequality to model this situation then solve the equation for the number of hours the mechanic worked on your car