I need more points can anyone transfer?

To complete your spring schedule, you must add calculus and physics. at 9: 30, there are three calculus sections and two physics sections; while at 11: 30, there are two calculus sections and three physics sections. how many ways can you complete your schedule if your only open periods are 9: 30 and 11: 30?

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.

Write two subtraction equations that are equivalent to 5 + 12 = 17.