no.
Yes it should be hyphenated.
It should be hyphenated when it's used as an adjective.
The term is hyphenated as "long-lasting" (persistent, perennial, long-lived).
Yes it should be hyphenated.
The term used as a descriptive term (adjunct) should be hyphenated (one-owner) but usually is not.
Yes it should be hyphenated.
Yes, it should be hyphenated.
Copay is a relatively recent term. It is not hyphenated. In general, short words like this are not hyphenated.
Yes it should be hyphenated.
yes check-up should be hyphenated
It should be hyphenated.