Tanya is raising money to go on a field trip. she is selling stickers for $1 and rubber bracelets for $3. the cost of the field trip is $36. write an equation to show how many stickers and bracelets she must sell to raise the money for the field trip. graph the equation. if tanya sells 8 bracelets, how many stickers does she need to sell to raise enough money for the field trip?