Answer:
Expression that gives weight of 1 fish:
.
The weight of 1 fish is 2.39 pounds.
Explanation:
We have been given that Tom and his brothers caught 100 fish on a week-long fishing trip. The total weight of the fish was 239 pounds.
Assuming that the weight of each fish is the same, we can find weight of 1 fish by dividing the total weight of fish by total number of caught fish.

Therefore, the expression that gives the weight of 1 fish is
.
Upon dividing 239 by 100 we will get,

Therefore, the weight of 1 fish is 2.39 pounds.