No the word "midday" is not hyphenated.
Yes, mid is not a word in itself, but acts as a prefix and so must be connected to the word following it, usually with a hyphen (although there are exceptions such as midday)
no
It's not a word in the dictionary, so yes, use the hyphen.
No. The word is "pinpoint".
nope
No, the word "coordinator" is one word.
No, the word "predetermine" is one word.
The word "desperate" doesn't need a hyphen.
Yes, in-home does need a hyphen. It's two words put together to form a word for a different concept.
Yes it should be hyphenated.
Yes it should be hyphenated.
hyphen