5x + 4y = -16 5x - 6y = 24

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?

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?

In the geometric progression –3, 12, −48… what term is 3,072?