State the domain and range for the association: I don’t know how to solve this I need the range and domain for this association. Please

Arianna is buying plants for her garden. she buys 15 flowering plants for $96. pink flowering plants sell for $8, and purple flowering plants sell for $5. how many pink flowering plants did arianna buy? i figured out the answer! the answer is 7. 8x +5y = 96 plug in 7 for x 8 (7) + 5y = 96 56 + 5y = 96 subtract 56 from both sides 5y/y = 40/5 y = 8 she bought 7 pink and 8 purple plants

Me because some of question i don’t understand

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.