Does this ring any bells?

I thought I would try and help a friend with her college algebra homework when Janet and I were there for a visit.  After all, I enjoyed algebra when I was a student.  However, I quickly discovered that my memory did not extend as far back in that area as I had thought it would.  A bit eye-opening in a few different ways.  An SOS call to Karmen provided the assistance that I could not.  Having a sister who is  mathematically inclined has been helpful more than once in my experience!