SOLUTION: vicky has misplaced one of her algebra quizzes. the scores on the quizzes are 82, 71, 83, 91, and 78. she knows that the mean of all six quiz scores is 79.5. what is the score on t

Question 485561: vicky has misplaced one of her algebra quizzes. the scores on the quizzes are 82, 71, 83, 91, and 78. she knows that the mean of all six quiz scores is 79.5. what is the score on the missing quiz?
Found 2 solutions by John10, Edwin McCravy:
Answer by John10(297) (Show Source): You can put this solution on YOUR website!
Let x be the missing score:
The mean is 79.5.
(82 + 71 + 83 + 91 + 78 + x)/6 = 79.5
Solve for x
John10:)
Answer by Edwin McCravy(20056) (Show Source): You can put this solution on YOUR website!

Let x be the missing score. Multiply both sides by 6 So she made a 72 on it. Edwin

RELATED QUESTIONS
Suppose a student has earned the following grades on her first four quizzes: 83, 72, 89,... (answered by ankor@dixie-net.com)
Suppose a student has earned the following grades on her first four quizzes: 83, 72, 89,... (answered by MathLover1)
A professor grades students on three tests, four quizzes, and a final examination. Each... (answered by ikleyn)
Lauren has grades of 98 and 86 on her first two chemistry quizzes. What must she score... (answered by josmiceli)
If a student has an average of 80% on 5 quizzes, what must his scores be on the next 2... (answered by macston)
Taylor earned the following scores on her first ten quizzes. What would she need to earn... (answered by Fombitz)
Alex received scores of 82 and 88 on his first two quizzes. What average score does he... (answered by Fombitz,CharlesG2)
a professor grades students on three test, four quizzes, and a final exam. Each test... (answered by alicealc)
after taking 3 math quizzes elisa has an average of 89. what must she score on the... (answered by stanbon)