Question

On a certain quiz with 25 questions, each correct answer is scored 4 points and each incorrect answer is scored –1 point. questions not answered receive no points. a student who answered 23 questions and had a total score of 82 points answered how many questions correctly? 18 19 20 21 22

Answer 1

21

Explanation:

Answer 2

x correct answers

23 - x incorrect answers

82 = 4x + -1(23 - x) = 3x - 23

105 = 5 x

x = 105/5 = 21

21 right 2 wrong 2 unanswered

Check: 4(21) -1(2) = 84-2=82 good