Why were most of the slave states concentrated in the south and southeast region of the united states

Which graph correctly shows the system of equations {y=12x+2y=−12x+6?

Ineed asap! ! what is the name of the system in which each branch of the u.s government can limit the actions of the other branches? a. perpetual union b. division of powers c. cooperative federalism d. checks and balances

Which term best describe the first spaniards in oklahoma? a) explorers b) treasure hunters c) pioneers d) settlers i need this andwer