document.write( "Question 1135261: Luke received grades of 88%, 72% and 82% on the three tests during the semester in a business course. If the final exam counts as two tests, what possible scores on the final exam will give him a final average of at least 80%? \n" ); document.write( "
Algebra.Com's Answer #752859 by rothauserc(4718)![]() ![]() You can put this solution on YOUR website! (88 +72 +82 +2x)/5 = 80 \n" ); document.write( ": \n" ); document.write( "multiply both sides of = by 5 and simplify \n" ); document.write( ": \n" ); document.write( "242 +2x = 400 \n" ); document.write( ": \n" ); document.write( "2x = 158 \n" ); document.write( ": \n" ); document.write( "x = 79 \n" ); document.write( ": \n" ); document.write( "*************************************************************************** \n" ); document.write( "final exam score of 79 or greater will give a final average of at least 80% \n" ); document.write( "*************************************************************************** \n" ); document.write( ": \n" ); document.write( " |