Agroup of 18 people ordered soup and sandwiches for lunch. each person in the group had either one soup or one sandwich. the sandwiches cost $7.75 each and the soups cost $4.50 each. if the total cost of all 18 lunches was $113.50, how many sandwiches were ordered?

Hii1977 cleaner shrimp are a species of shrimp that clean parasites from other organisms. fish allow the shrimp to eat the parasites in their mouth. the shrimp get a source of nutrition. the relationship between the shrimp and the fish is this association indicates that for the smaill aneser arecommensal, mutualistic, or parasitic for the begger one the anser are the shrimp and fish benefit each other , the shrimp harm the fish, or the fish do not benetit from the shrimp