If there were c correct answers, then there were 10-c wrong answers. So, now use her score to find c:
5c - 2(10-c) = 29
In a science competition with ten problems, a student gets 5 points for a correct answer and loses 2 points for an incorrect answer. If Alice answered every problem and her score was 29, how many correct answers did she have?
i'm thinking you have to set up an equation but i'm so confused on how to set it up and I have basically tried everything to solve this question but I don't know how to.
1 answer