Noel devine bought a new dishwasher for $320. he paid $20 down and made 10 monthly payments of $34. what actual yearly interest rate did noel pay? a. 29.09% b. 68.75% c. 14.55% d. 34.38%
i know i'm making this harder than it needs to be, but i really don't understan. can you explain how to get the answer? !

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

the answer is ! ?