Please help me with this question, thanks.

Which of the symbols correctly relates the two numbers below check all that apply 6? 6

Which of the following is not a subset of {1,2,3}?

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.