Can a project combine multiple software development models?

Question

Agile

Can a project combine multiple software development models? If the answer is yes, why?

Answer 1

The model is not an icon, you can break it into parts and decide as you like.
Moreover, I will say that the waterfall is cheaper than agile and scrum.
The combination is useful when you have made "bones" and are building up "fat"

Answer 2

There are millions of projects, you can combine anything if it works. To understand whether they will be combined in your case, you need at least a little input, some minimum of restrictions that are now only in your head.

Answer 3

The person is asking theoretically, not applicable to a specific project.