document.write( "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. \n" ); document.write( "

Algebra.Com's Answer #252855 by robertb(5830) $\"\"$ $\"About$

You can put this solution on YOUR website!
From the equation $\"S%2F6=74\"$ , we get $\"S+=+444\"$ , the sum of all his scores from the 6 exams. let x = his score on the 7th exam. Thus,
\n" ); document.write( " $\"%28444+%2B+x%29%2F7+=+80\"$ . (Note that he has to get an 80 out of an hundred to get a B.)
\n" ); document.write( " $\"444%2Bx+=+560\"$ .
\n" ); document.write( " $\"x+=+116\"$ .
\n" ); document.write( "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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