2. Scientists think that the movement of crustal plates is caused by a) conveyor belts.
b) pressure in the earths core.
c) the core.
d) convection currents.

Can someone me with this plz? ! i'm putting 20 points on it!

The vegetation that thrives in the tundra is limited to a. mosses, barley, wheat, and corn. b. coniferous trees. c. dwarf shrubs, mosses, lichen, potatoes, and beans. d. mosses, lichen, algae, and dwarf shrubs.

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