In an essay it should only be one I'm pretty sure, but in a narrative as many as it takes to explain a lesson learned. If you were writing a book your conclusion would be whatever comes to you and whatever you feel the characters would do/say/feel.
If you look at a dictionary to substantiate is to support an opinion or claim with proof or evidence. So a Substantiated opinion is an opinion that is backed up with proof.
Hope this helps :)
The chapter that takes place seven years later is Chapter 13.
The answer is Johnson cites instances of voter suppression, then gives valid reasons why laws protecting the freedom to vote need to be enforced. This is made for the African to have the right to vote and that there must be no restriction and racial discriminations towards them.
It looks like that is already rounded, as there is no solid numbers beside the 2 after the decimal.
If this is wrong, tell me.