SOLUTION: Liz has scores of 74 and 82 on her first two algebra tests. What must she score on her third test so that her average is at least 80?

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Question 371317: Liz has scores of 74 and 82 on her first two algebra tests. What must she score on her third test so that her average is at least 80?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi,

Let x represent the score on her third test.

%2874%2B82%2Bx%29%2F3+=+80

156 + x = 240

x = 84

checking our answer

(74 + 82 + 84) / 3 = 80