SOLUTION: Xavier is taking a geology course in which four tests are given. To get a B, he must average at least 80 on the four tests. He got scores of 82,76, and 78 on the first three test.

Question 990248: Xavier is taking a geology course in which four tests are given. To get a B, he must average at least 80 on the four tests. He got scores of 82,76, and 78 on the first three test. Determine what scores on the last test will allow him to get at least a B
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
.
Let x=score on final test
To average at least 80:
(82+76+78+x)/4 => 80
(236+x)/4=>80
236+x=>320
x=>84
.
ANSWER: He must score at least 84 to average 80 .
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