SOLUTION: A student has a test average of 74% after taking six exams. The student wants to get an 80% average to earn a B for the course. The student has 1 more exam to take, is it possible

Question 353728: A student has a test average of 74% after taking six exams. The student wants to get an 80% average to earn a B for the course. The student has 1 more exam to take, is it possible to earn a B.
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
From the equation , we get , the sum of all his scores from the 6 exams. let x = his score on the 7th exam. Thus,
. (Note that he has to get an 80 out of an hundred to get a B.)
.
.
Therefore he has to get 116 out of 100 in his last exam, which is impossible (at least on paper! haha)

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