Determine by checking the group axiom (Associativity) whether this set is a group: (C, o), where x o y = x + y - 2i

C = set of all imaginary numbers

Which graph represents the solution set for the given system of inequalities? x+2y< 3 x+y> 4 3x-2y> 4

For each proportion find the unknown number x 1/5/8=×/15

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?