Dallen002 Dallen002

03-01-2017
Mathematics

contestada

Jose's math grade is the mean of his three exams. His grades of the first two exams were 82 and 93. What grade must he earn on his third exam to have of at least 90 for the class?

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AmplifiedHuman AmplifiedHuman

03-01-2017

So we let the mark of his third exam be x
(82+93+x)/3=90
Multiply both sides by 3
82+93+x=270
x=93

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Аноним Аноним

03-01-2017

98
because ..
82+93+98=273
273/3=91

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