Are you insane? This has no context...
is it possible to mate with just a rook and bishop?

Next time don't post questions about pending games.
When you do post questions an interactive diagram with the coordinates is very helpful and will elicit more analytical responses IMHO

I'm assuming you're referring to your ongoing game against chroot ?
Even though you're asking for very general advice, you really shouldn't be asking for any kind of help in a current game - it's just bad form !

You should learn all the checkmate patterns first,before to start to play chess.
I disagree. Many players learn "on the go" instead of studying before playing. It is a game, after all.
My one pawn is blocked so I was wondering if it's possible to checkmate with a bishop and a rook; those are my only major pieces left. I'm wondering if I should just resign...