1.        at a fundraiser dinner, the bill for 4 cups of coffee and 6 spaghetti specials is $20.50, whereas the bill for 1 cup of coffee and 3 spaghetti specials is $8.75. write a system of 2 equations to model this problem. let c stand for the price of a cup of coffee and let s stand for the price of a spaghetti special. use the substitution method to solve the system of equations. what would the bill be for 1 cup of coffee and 1 spaghetti special? (pls ! )