document.write( "Question 539327: john has an 88 average on his last 6 tests. if there are two tests left in the class he is taking, what must his average on these two tests be in order that his final average for all 8 tests to be 90? \n" ); document.write( "

Algebra.Com's Answer #353404 by josmiceli(19441) $\"\"$ $\"About$

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( total of 6 tests ) / 6 = 88
\n" ); document.write( "total of 6 tests = 88*6
\n" ); document.write( " $\"+88%2A6+=+528+\"$
\n" ); document.write( "Let $\"x\"$ = total score of next 2 tests
\n" ); document.write( " $\"+%28+528+%2B+x+%29+%2F+8+=+90+\"$
\n" ); document.write( " $\"+528+%2B+x+=+720+\"$
\n" ); document.write( " $\"+x+=+720+-+528+\"$
\n" ); document.write( " $\"+x+=+192+\"$
\n" ); document.write( " $\"+192%2F2+=+96+\"$
\n" ); document.write( "The average for the next 2 tests must be 96 \n" ); document.write( "

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