document.write( "Question 623132: If you have 70, 75, and 90 what score do you need to get an average of 80? \n" ); document.write( "
Algebra.Com's Answer #391892 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! If you have 70, 75, and 90 what score do you need to get an average of 80? \n" ); document.write( "------ \n" ); document.write( "(70 + 75 + 90 + Score)/4 = 80 \n" ); document.write( "70 + 75 + 90 + Score = 320 \n" ); document.write( "Score = 85 \n" ); document.write( " \n" ); document.write( " |