yes check-up should be hyphenated
Yes it should be hyphenated.
Yes, it should be hyphenated.
Yes it should be hyphenated.
It should be hyphenated.
Yes it should be hyphenated.
No it shouldn't be hyphenated.
Yes, "low-to-intermediate" should be hyphenated when used as a compound modifier before a noun.
"Field" is not hyphenated.
Yes it should be hyphenated.
Yes it should be hyphenated.
A person should have a dental checkup with cleaning twice per year.
Self-made should be hyphenated.