Convection currents or movement of hot magma throughout the earth’s mantle causes the tectonic plates to move true of false

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years

A,b,c is the answer to the question

5×^2+20-15 or -(5x^2-20+15)