SOLUTION: If you have 70, 75, and 90 what score do you need to get an average of 80?

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Question 623132: If you have 70, 75, and 90 what score do you need to get an average of 80?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If you have 70, 75, and 90 what score do you need to get an average of 80?
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(70 + 75 + 90 + Score)/4 = 80
70 + 75 + 90 + Score = 320
Score = 85