Explanation:
This is it. Proportion
if 3 pounds of blue berries cost 10.50
1 pound of blue berries cost 10.50÷3=3.50
Therefore 7 pounds of blue berries cost
3.50 ×7= 24.50
2. Let a be the number of pounds of blue berries you can buy with 35.00
1 = 3.50
a = 35.00
a=35.00÷3.50
a= 10
Therefore, 35.00 is equal to 10 pounds of blue berries.