Pls help what was NOT an effect of Westward Expansion on Native tribes

Agovernment is a government system where all citizens that choose to vote have a say in their government. question 4 options: communist democratic autocratic theocracy

The largest formal unit of geologic time is

Which effect did the united states supreme court's decision in plessy v. ferguson have? 1. ending segregation in all public schools in america 2. protecting voting rights for african americans by eliminating literacy tests 3. upholding the rights of all citizens to be treated equally by the government 4. authorizing the system that kept black and white people separated