SOLUTION: Alexis received an 85, 89, and 92 on three tests. How many points does she need to score on her next
test in order to have an average of at least 90?
Algebra.Com
Question 911033: Alexis received an 85, 89, and 92 on three tests. How many points does she need to score on her next
test in order to have an average of at least 90?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
If the average of 
data points is 
, then the sum of the data points must be 
. So multiply the desired average by the number of tests to obtain the desired overall sum, then add the scores from the tests already taken and subtract that sum desired sum to get the necessary score for the desired average.
John
My calculator said it, I believe it, that settles it
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