Which of these are accepted as true without proof?

a. experiments

b. opinions

c. postulates

d. theorems

Which ahows the graph of the solution set of 6x+4y< 12

One of the inventors of integrated circuits observed that the number of transistors that fit on an integrated circuit will double every 24 months. what type of relationship most appropriately models this situation?

Can someone me out here and the tell me the greatest common factor