document.write( "Question 996810: A student scored 72 and 89 on her first two quizzes. Write and solve a compound inequality to find the possible values for the third quiz score that would give her an average between 75 and 90, inclusive. \n" ); document.write( "
Algebra.Com's Answer #615101 by fractalier(6550)![]() ![]() You can put this solution on YOUR website! The setup for this problem is \n" ); document.write( "75 < (72+89+x)/3 < 90 \n" ); document.write( "Now multiply everything by three and simplify and get \n" ); document.write( "225 < 161 + x < 270 \n" ); document.write( "Now subtract 161 and get \n" ); document.write( "64 < x < 109 \n" ); document.write( " |