sorry that this question is "stupid" : ) So, I've installed elementary, figured out how to access the internet, downloaded two of my favorite programs (LibreOffice and Firefox), clicked on the packages and "extracted" the files. Where did the applications go? and How do I put them in my applications file? Nothing in the extracted files has the names of the applications (that I could find). Thank you.
Are you new to Linux? If you are then you should learn how to install software in Linux. Since elementary is derived from Ubuntu then just google how to install bla in Ubuntu. Installing libreoffice and firefox is so easy. You can find them in repository by typing
sudo apt-get install libreoffice
sudo apt-get install firefox
in terminal. Just learn how to use apt and you are master.
Not a stupid question at all! It sounds like two things are going on here:
Ubuntu apps are often distributed outside the AppCenter in .deb packages. elementary OS doesn't come with a way to install .deb packages. This is by design, and in most cases installing an app from the AppCenter is simpler and more reliable than installing the same app from a .deb package. That said, you can install .deb packages by following these instructions.