So long as one is male and the other is female, then yes.
Sometimes rabbits will try and mate with guinea pigs no matter what sex they are. However the rabbit cannot impregnate the guinea pig because it is a different species.
Mate with other rabbits
If mating rabbits is your profession and you make profit from it then it is ok. But keep in mind rabbits might not mate all season long.
yes they can
in a cage
no
yes.
When rabbits aren't digging, they eat, play, sleep and mate.
You should never have 2 male rabbits (Bucks) together. They'll fight and they might kill each other.
No it has to be 1 male and 1 female if it is 2 males or 2 females it won't work.
two to three months trust me my dad breeds rabbits for a living
Sometimes I wonder if people actually put any thought into these questions. To answer your stupid question, rabbits would not/could not mate with Guinea pigs. As I hope you learned in Biology class, 2 entirely different species of animals cannot reproduce.