No it doesn't require a hyphen.
You should hyphenate "hand-painted" when it precedes the word it is modifying, as in "a hand-painted tray". However, if it is a predicate adjective, as in "All the signs were hand painted", you would not hyphenate it.
Any hyphenated word(s) or phrase does so without the use of spaces. So, hand-in-hand would be the result.
Don't hyphenate; ongoing is one word.
You do not hyphenate the number.
I think it's more accepted to hyphenate it.
You hyphenate it only at the hyphen.
You do not need to hyphenate.
You would hyphenate "thank you" when it is used as an adjective before a noun, such as in "a thank-you card."
Can you, or should you? You can hyphenate it if you're moving between lines in a paragraph and need to break up the word. You shouldn't hyphenate it normally.
You mean at the end of a line? Well it depends on how much room you have hyphenate at a syllable is probably best. If you have little space before the end of the line don't hyphenate a word. You could hyphenate like this trans- portation.
No...
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