Technically I'm taking Calculus, but this is still in the range of Algebra I believe.

The question is:

3x+5

over

x^2+9x+20

And all we have to do is state the intervals for the domain. So I have (-INF, -6],[-3,INF).

But it's asking for three intervals, and I'm not sure what to put in the third one.

We're using an online system,, so it's possible it could be a bug I suppose, but if not, I'm not sure what I'm missing.