document.write( "Question 83277: after taking 3 math quizzes elisa has an average of 89. what must she score on the fourth quiz t raise her average to 91. \n" ); document.write( "
Algebra.Com's Answer #59795 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! after taking 3 math quizzes elisa has an average of 89. what must she score on the fourth quiz t raise her average to 91. \n" ); document.write( "------------- \n" ); document.write( "If she averaged 89 on 3 quizzes she has 3*89 = 267 points. \n" ); document.write( "Let x be the score she needs to average 91: \n" ); document.write( "(267+x)/4 = 91 \n" ); document.write( "267+x = 364 \n" ); document.write( "x = 97 (score she needs on the 4th quize) \n" ); document.write( "============ \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |