"They have come" is current. "They are come" is ancient and archaic and not used anymore. It was used about the time that the bible was written.
Output is what is produced. Outcomes are the result of the output
2 and a half
2 and a 1/2 or 2.5
The prefix inter means between or among a group - see example below: intercept - to stop someone or something that is going from one place to another and prevent them from getting there