Mr. Weber drives to a landscape supply center to buy sand and gravel. The center has 6 lb of sand and 13 lb of gravel in stock. Mr. Weber needs at least 2 lb of sand. The amount of gravel he will buy will be at least twice the amount of sand he will buy. Mr. Weber buys 7 lb of gravel. How much sand can he buy? Select each correct answer.


2 lb

3 lb

4 lb

5 lb

6 lb