Question

Look at the sets below.

{3, 6, 9, 12, 15} {1, 6, 12, 18, 24}

Which of the following shows the union of the sets?

Answer 1

I don't even know what union is!!!

Answer 2

{1,3,6,9,12,15,18,24} i think this is the answer

Answer 3

Ok can I ask you another?

Answer 4

Well if I can, Simplify the expression below.
(4x)^3
(4x)3
4x3
7x3
12x3
64x3

Answer 5

is "x" a variable or a multiplication sign?