gggg79
31.07.2019 •
Mathematics
Evie has scores of 72, 78, 80 and 84 on four science quizzes. what score must she get on the next quiz to have an average of at least 80?
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Ответ:
(72+78+80+84+x)/5=80
*5 *5
72+78+80+84+x=400
314+x=400
-314 -314
x=86
Evie needs to get a score of 86 on her next science quiz.
Ответ:
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