A“separation of powers” refers to

a structure for organizing the different levels of government.
a method of controlling a vast empire.
the practice of all citizens taking part in government.
a government where military officials make all important decisions.

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal

What is the value of x? enter your answer in the box. x =

Which country’s foreign policy is designed to threaten u. s. economic superiority? china russia iran japan