document.write( "Question 491775: the average of the first three test grades is 78. what grade must be received on the fourth and final test to receive an average 80? \n" ); document.write( "
Algebra.Com's Answer #334767 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! (78*3 + g)/4 = 80 \n" ); document.write( "234 + g = 320 \n" ); document.write( "g = 86 \n" ); document.write( " \n" ); document.write( " |