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mia6291
18.11.2019 •
Mathematics
Lisa's grades on four exams are 90, 92,86 and 78. what is the lowest grade she can receive on the next exam to average an 85?
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Ответ:
You stuck?
Let's figure this out!
(80+92+86+78+x)/5 > 85
(336+x)/5 > 85
336+x > 425
x > 89 is the grade she needs to get an average of 85. If the requirement is that it must be greater than 85, then:
89+1= 90 is the lowest she needs to have an average greater than 85
Hope this helps!
Ответ: