document.write( "Question 1004193: Alexis has taken 3 exams and her average is currently X. On the fourth exam, she scored 20 points higher than her average (so she scored X + 20). How many points did her average increase by after this fourth exam? \n" ); document.write( "
Algebra.Com's Answer #620715 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! average=total/n \n" ); document.write( "x*3=total \n" ); document.write( "fourth test scores (x+20) \n" ); document.write( "new total is 3x+(x+20)=4x+20 \n" ); document.write( "Divided by 4, the new n \n" ); document.write( "the average is x+5. Her average increased by 5. \n" ); document.write( " |