SOLUTION: A student averaged 77% on his first five exams in physiology. He averaged 74% on his first four exams. What scores did he earn on his fifth exam? Can the student raise his average

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Question 1056568: A student averaged 77% on his first five exams in physiology. He averaged 74% on his first four exams. What scores did he earn on his fifth exam? Can the student raise his average go 80% by doing well on the sixth exam? Show your work.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.%28A%2BB%2BC%2BD%2BE%29%2F5=77
2.%28A%2BB%2BC%2BD%29%2F4=74
From 1,
A%2BB%2BC%2BD%2BE=385
and from 2,
A%2BB%2BC%2BD=296
Subtracting,
%28A%2BB%2BC%2BD%2BE%29%2B%28A%2BB%2BC%2BD%29=385-296
E=89
.
.
.
%28A%2BB%2BC%2BD%2BE%2BF%29%2F6=80
A%2BB%2BD%2BC%2BD%2BE%2BF=480
385%2BF=480
F=95
Yes, the student needs a 95.