document.write( "Question 391180: Justin has an average of 94 in math, based on five test scores. He needs a 93 average to get an \"A\". What grade must he get on his last test in order to get an \"A\"? Round to the nearest whole number, if necessary. \n" ); document.write( "

Algebra.Com's Answer #277480 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"x\"$ = the grade he must get on last test
\n" ); document.write( "The sum of his scores on the 1st 5 tests is $\"5%2A94+=+470\"$
\n" ); document.write( "because the formula for average is (sum of scores)/(# of tests) = average
\n" ); document.write( " $\"%28470+%2B+x%29%2F6+=+93\"$
\n" ); document.write( " $\"470+%2B+x+=+6%2A93\"$
\n" ); document.write( " $\"x+=+558+-+470\"$
\n" ); document.write( " $\"x+=+88\"$
\n" ); document.write( "He must get at least an 88
\n" ); document.write( "check:
\n" ); document.write( "suppose he got an 87?
\n" ); document.write( " $\"%28470+%2B+x%29%2F6+=+93\"$
\n" ); document.write( " $\"%28470+%2B+87%29%2F6+=+93\"$
\n" ); document.write( " $\"557%2F6+=+92.83\"$
\n" ); document.write( "He wouldn't get an A \n" ); document.write( "

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