SOLUTION: James took math quiz in which he earned 1 point for every correct answer and lost 0.5 point for every incorrect answer. James answered 12 out of 18 questions correctly. What was J

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Question 1137635: James took math quiz in which he earned 1 point for every correct answer and lost 0.5 point for every incorrect answer. James answered 12 out of 18 questions correctly. What was James quiz score
Answer by Theo(13342) About Me  (Show Source):
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he got 1 point for every correct answer and lost a half a point for every incorrect answer.

he answered 12 out of 18 correctly.

that means 12 correct and 6 incorrect.

12 * 1 = plus 12 points for the questions that were answered correctly.

6 * .5 = minus 3 points for the questions that were answered incorrectly.

total score was 12 - 3 = 9.