document.write( "Question 726655:
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document.write( "You have a 77 test average in Math. Your mom wants the average up to an 80. You've taken 3 tests and you only have one test left. What do you need to get on that last test to raise your average to an 80? \n" );
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Algebra.Com's Answer #444758 by checkley79(3341)![]() ![]() ![]() You can put this solution on YOUR website! (3*77+X)/4=80 \n" ); document.write( "231+X=4*80 \n" ); document.write( "231+X=320 \n" ); document.write( "X=320-231 \n" ); document.write( "X=89 IS NEEDED ON THE 4 th. TEST TO AVERAGE 80. \n" ); document.write( " |