Final answer:
Brandon can buy 9 packs of juice boxes and Alex can purchase 8 cans of almonds, allowing them to make 144 complete snack bags in total, limited by the quantity of juice boxes.
Step-by-step explanation:
Calculation of Complete Snack Bags
Firstly, we calculate how many packs of juice boxes Brandon can buy with $16. Since each pack costs $1.75, Brandon can buy 9 packs (because $16 ÷ $1.75 = 9.14, but since he cannot buy a fraction of a pack, he can only buy 9 packs).
Next, we calculate how many cans of almonds Alex can buy with $21. Each can costs $2.59, so Alex can buy 8 cans (because $21 ÷ $2.59 = 8.10, but since he cannot buy a fraction of a can, he can only buy 8 cans).
Now, since each pack of juice contains 16 juice boxes and Brandon bought 9 packs, there will be a total of 144 juice boxes (9 packs × 16 juice boxes/pack). For the almonds, since each can contains 200 almonds and Alex bought 8 cans, there will be a total of 1600 almonds (8 cans × 200 almonds/can).
Since we need to create complete snack bags with both juice boxes and almonds, the number of complete snack bags is limited by the item with the least quantity. Therefore, they can make 144 complete snack bags as that is the number of juice boxes available, and this number will dictate the number of complete snack bags.