Mathematics, 23.01.2021 14:00 kitttimothy55

William got scores of q sub 1, , and q sub 3 on three quizzes. a. Write a formula for the average x of all three quizzes.

b. William got an 85 and an 88 on the first two quizzes. What formula can William use to determine the score he needs on the third quiz to get an average of 90? What score does he need?

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William got scores of q sub 1, , and q sub 3 on three quizzes. a. Write a formula for the average x...

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