SOLUTION: Test scores: Your test scores are 71,75,82,and 86. What is the lowest grade that you can get on the next test and still have an average score of at least 80? What I did was:

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Question 471144: Test scores:
Your test scores are 71,75,82,and 86. What is the lowest grade that you can get on the next test and still have an average score of at least 80?
What I did was:
5(71+75+82+86+s) is greater than or equal to 5*80
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 

Hi

'Average' = (71+75+82+86+s)/5

(71+75+82+86+s)/5 ≥ 80

(71+75+82+86+s)≥ 5*80

             s ≥ 400-314

             s ≥ 86 

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