Was the roman senate more efficient than the athenian assembly?

What is the purpose of the system of checks and balances

Look at the graph. where p is price and q is quantity, what might cause a move from b to a?

Two of these describe "federalism." (choose two answers) select one or more: a. the national government absolutely controls all state governments. b. power is shared by the national and state governments. c. state governments exercise absolute power over the national government. d. it is a compromise meant to eliminate the disadvantages of a "unitary" and a "confederate" system.