These are two words. There is no hyphen in the concept. In charge means to have leadership in English, so there is no hyphen to connect the two.
does write up need a hyphen
75,000 = seventy-five thousand.
You separate the syllables with a hyphen.
Write off is the difference between total charge and the allowable amount by the insurace. Write off is the difference between total charge and the allowable amount by the insurace.
Hyphen Notation is the name of the element, then hyphen, then the mass number written after the element. For example, Chlorine-35.
I think it would be preferable in most cases to write 1880's. I would not spell it out.
Yes, there is a hyphen in "fifty-nine." When writing out compound numbers from twenty-one to ninety-nine, a hyphen is used to connect the two parts of the number. Therefore, it is correct to write it as "fifty-nine."
167 may be written as one hundred sixty-seven. A hyphen should always be used between the tens and units digits when writing out numbers, but never between the hundreds and tens digits.
Yes, "younger-looking" should have a hyphen when used as a compound adjective before a noun. The hyphen clarifies that "younger" modifies "looking" as a single idea describing the noun that follows. For example, you would write "She has a younger-looking appearance."
The term "community-wide" does require a hyphen when used as a compound adjective before a noun. For example, you would say "a community-wide event." However, if it follows the noun, you would write it without the hyphen, as in "the event was community wide."
Ninety. To go up from that, use a hyphen. (Ninety-one, ninety-two...)
I would write 15,001 as fifteen-thousand and one. Though I suspect the hyphen is not necessarily correct.