PLEASE HELP!!!!!!!!
Listen, I've been working on this question all day and getting stressed. Please help.
Each afternoon Maria walks the dogs at a local pet shelter for up to 2 hours. Maria spends 16 minutes walking a large dog and 12 minutes walking a small dog. Write an inequality for this situation. If Maria walked 9 small dogs in one afternoon, what is the greatest number of large dogs that she could have walked that afternoon?
Please explain step by step, I really need it.