Question

what is the union of X and Y?
X. (3,5,9) Y. (5,10,15)

Answer 1

The union is the set of elements which are in at least one of the sets.

Answer 2

i need a number answer, and i can't figure it out

Answer 3

The answer is a set.

Answer 4

but what numbers are in that set for my answer?

Answer 5

i am confused

Answer 6

The union is all of the numbers that are in either set.

Answer 7

someone told me the answer was 48, but am i adding the numbers or what to get that answer?

Answer 8

Nope, you are just sticking them inside some parentheses together.

Answer 9

So your answer will look like (number,number,number,...)

Answer 10

Since 3 is in X, 5 is in both, 9 is in X, 10 is in Y, and 15 is in Y, the answer is \(\{3,5,9,10,15\}\).