5. Which expression requires you to use
the Associative Property of Addition in
order to simplify?
A. [y + (-y)] + x
B. (y + x) + (-x)
C. y + [X + (-x)]
D. y + (-x + x)

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?

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.