ShyBinFloxkin ShyBinFloxkin

26-02-2018
Mathematics

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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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airelavice airelavice

26-02-2018

x= the next quiz
(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.

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