No
good bye good-bye goodbye (this is the right way)
It does not need to have a hyphen! :)
"Good-bye" traditionally has a hyphen to indicate that it is a compound word formed from "good" and "bye," which is a variation of "goodbye." The hyphen helps clarify the relationship between the two parts, signaling that they combine to convey a single idea of parting. However, it is commonly written as "goodbye" without a hyphen in modern usage. The hyphenated form is less common today but can still be seen in certain contexts.
No, the word "nineteen" does not need a hyphen when written numerically.
It's not a word in the dictionary, so yes, use the hyphen.
I do not believe that multitasking is supposed to have a hyphen.
You typically need only capitalize after sentence-ending punctuation, which a hyphen is not.
no
no
No
No.
Yes, in-home does need a hyphen. It's two words put together to form a word for a different concept.