The movement of continents over the earth's ?

What two advantages do the coastal countries of west africa have over the sahel countriesfertile soil and mineral resources temperatures and terrain human resources and natural resources weather patterns and location

Given f(x) = 3x= 1 and g(x) = 2x-3, for which value of x does g(x)= f(2)? its for algebra

In what way does renewable energy differ form nonrenewable energy?