SOLUTION: how do you get the mean of a quiz score when the student scored 469 and the z score is -3 and the standard deviation is 7? I am feeling lost or maybe tired

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Question 752525: how do you get the mean of a quiz score when the student scored 469 and the z score is -3 and the standard deviation is 7? I am feeling lost or maybe tired
Answer by reviewermath(1029) About Me  (Show Source):
You can put this solution on YOUR website!
Q:
how do you get the mean of a quiz score when the student scored 469 and the z score is -3 and the standard deviation is 7? I am feeling lost or maybe tired
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A:
z score = %28x+-+mu%29%2Fsigma
-3 = %28469+-+mu%29%2F7, multiply both sides by 7
-21= 469+-+mu
mu+ = 469 + 21 = 490
The mean of a quiz score is highlight%28490%29.