IS the following expression undefined nine plus nine divided by nine minus nine?

Answer 1

Well, first of all, this question shouldn't be in the Pokemon FireRed and LeafGreen category. Secondly, the answer to your question, following the order of operations, (or PEMDAS, as the average layman remembers it,) your question should look like this:

(9+9)/(9-9)

The equation should come out to this:

(18)/(0)

18 can't divide by zero. It's technically impossible, so yes, it is undefined. Most people prefer to answer this question as simply, zero. Once you get into algebra, this'll all make sense to you... I hope.