Could someone help me with this? I am super desperate and I don’t understand this math at all. “Adding which terms to 3x^2y would result in a monomial? Check all that apply.”
•3xy
•-12x^2y
•2x^2y^2
•7xy^2
•-10x^2
•4x^2y
•3x^3
Here’s a picture in case I wrote something weird, lol (it should be at the top and it looks all black but the question shows up once you click on it.)

Consider a bag that contains 220 coins of which 6 are rare indian pennies. for the given pair of events a and b, complete parts (a) and (b) below. a: when one of the 220 coins is randomly selected, it is one of the 6 indian pennies. b: when another one of the 220 coins is randomly selected (with replacement), it is also one of the 6 indian pennies. a. determine whether events a and b are independent or dependent. b. find p(a and b), the probability that events a and b both occur.