Problema Solution
On an exam, students earn 5 points for each correct response and lose 2 points for each incorrect response. Arturo answered 27 questions on the exam and earned a score of 93 points. How many of his responses were correct?
Thank you
Answer provided by our tutors
Q:
On an exam, students earn 5 points for each correct response and lose 2 points for each incorrect response. Arturo answered 27 questions on the exam and earned a score of 93 points. How many of his responses were correct?
solution:
18.6
5c-2(27-c)=93
5c+2c-54=93
7c=93+54
c=147/7
c=21
Arturo answered 21 problems correctly.