Question

a packet of clay weighs 4/5 pounds. troy needs 9 pounds of clay for his model. how many packets of clay must he buy

Answer 1

12 packets of clay

Explanation:

Since the amount of packets is proportional to the weight in pounds, we can determine how many packets (p) Clay must buy for 9 pounds of clay using a proportion:

4/5 lbs / 1 packet of clay = 9 lbs / p packets of clay

(4/5 = 9/p) * p

(4/5p = 9) * 5/4

p = 11.25

p = 12

• We can't have a fraction of a packet, so Clay needs at least 12 packets of clay.

• Buying 12 packets means that Clay will have 9.6 lbs of clay since 4/5 * 12 = 9.6, meaning he'll have just enough for his model and 0.6 lbs left over.