The 3/5ths Compromise answered which of the following questions?

How slaves would be counted.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

19th amendment granted women the right to vote. the 19th amendment guarantees all american women the right to vote.