When I take part in a round table, the event is two words. When used attributively, it is hyphenated, eg I attended a round-table discussion. It is a modifier, two words joined together with the hyphen.
No, it is not necessary to use a hyphen in this phrase. It should be written as "small car salesman."
The professor teaching Communications in the Community started off class asking the rhetorical question, "Should we talk to walls?"
No, "a well know" is not a correct phrase. It should be "a well-known" with a hyphen to make it an adjective.
No, a hyphen is not needed.
without a hyphen idiot
No. Fully, when used as an adverb, is not followed by a hyphen. :)
I believe anything-American is hyphenated and the hyphen takes the place of ' and. '
There should be a hyphen in twenty-three.
You do not use a hyphen when writing square feet. Using a hyphen would make it one word which should not be the case.
Nah.
No, there shouldn't be.
A hyphen is not required.