Answer: 4
Step-by-step explanation:

If you mean
3/15+12/6
the answer is 2.2
The answer to your question is 6 and no it is not undefined
Answer:
The First One
Step-by-step explanation:
Try to substitute x by zero for example
(the minus will gone by zero)
You will get y = +2
and the graph you see the y =+2 !!
I hope that it's a clear solution and explanation.