SOLUTION: On the first 3 quizzes of his geometry class, Christopher got an average score of 81. What does he need on the next quiz to have an overall average of 83?

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Question 925772: On the first 3 quizzes of his geometry class, Christopher got an average score of 81.
What does he need on the next quiz to have an overall average of 83?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
+%283%2A81+%2B+x%29%2F4+=+83
x = 332 - 243 = 89