I just had a look at https://askubuntu.com/unanswered and I saw that most of the questions were answered. Not recently either. Some of them were answered two months ago. Why is this?
Answers need upvotes to be considered answered.
So if a question has like 3 answers and none of them have upvotes then it's still considered unanswered because no one in the community thinks the answers deserve an upvote.
This is why voting is crucial for the health of the site: