A. Let F be the number of fish she can buy. The inequality representing the problem is:
F * price per fish <= $15
Where the price per fish is the cost of each fish Brittney wants to buy.
B. To find how many fish Brittney can buy, we need to know the price per fish. If we assume that each fish costs $3, then she can buy 5 fish:
F = 5
F * price per fish = 5 * $3 = $15
If the price per fish is different, then the number of fish she can buy will also be different.