On a quiz, Tom received 2 points for each correct spelling word, and 4 points for each correct definition. Tom received 80 points for a total of 30 correct responses. The equations and graph below can be used to determine the number of Tom’s correct responses, where x represents the number of correct spelling words and y represents the number of correct definitions. Correct responses: x + y = 30 Total points: 2 x + 4 y = 80 How many words and how many definitions did Tom get correct?