t = number of tents; r = number of RV spots
This is a linear programming problem.
Maximize 3t +9r
Subject to:
1)..t + r <= 120
2)..8t + 30r <= 1400
I wouldn't have thought that you have learned linear programming yet.
You can continue this method to get the final answer.
I hope my answer has come to your help. Thank you for posting your question here in Brainly.