document.write( "Question 972274: She has test scores of 65,78,81,82and 90. What must be scores on her 6 test to maintain an average score of 80?
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #594601 by amarjeeth123(570)![]() ![]() ![]() You can put this solution on YOUR website! Let the test score on the 6th test be x. \n" ); document.write( "Then we have (65+78+81+82+90+x)/6=80 \n" ); document.write( "(396+x)/6=80 \n" ); document.write( "396+x=480 \n" ); document.write( "x=480-396=84 \n" ); document.write( "She must get 84 on her 6th test to get an average of 80. \n" ); document.write( " |