SOLUTION: Going into the final exam, Tiffany has test scores of 80, 81, 73, 65 and 91. What score does she need on the final in order to end up with an average score of at least 80? The fina
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Question 337648: Going into the final exam, Tiffany has test scores of 80, 81, 73, 65 and 91. What score does she need on the final in order to end up with an average score of at least 80? The final counts double. Found 2 solutions by chiexpert, Fombitz:Answer by chiexpert(48) (Show Source):
You can put this solution on YOUR website! (80+81+73+65+91+2x)/7>80
390+2X > 80*7
2X > 80*7 - 390
X> {(80*7)-390}/2
X>85 2X=2(85) = 170
THE SCORE HAS TO BE AT LEAST 170 OR MORE
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