What is the definition of "Separation of Powers"? And what's the importance of it?

What is an example of a secondary source?

Which of the following was a characteristic of government proposed by the new jersey plan? it denied congress the ability to levy taxes. it based representation on population rather than keeping states equal regardless of size. it denied congress the ability to regulate trade. it preserved an executive committee rather than adopting a singular president.

The 15th amendment to the u.s. constitution, ratified in 1870, deals with what issue? a. prohibition of alcohol b. voting c. declaring war d. free speech