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Mathematics 10 Online
OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

The answer is a set.

OpenStudy (anonymous):

but what numbers are in that set for my answer?

OpenStudy (anonymous):

i am confused

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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 \(\{3,5,9,10,15\}\).

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