no.
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.
yup!! :)
No
The term multistory (UK multistorey) are apparently not hyphenated.