When sally went bowling her scores were 108, 72, and 95. if she bowls a 4th game, what will her score need to be to give her an average of 91?

X= score of 4th game

Add the 4 scores, divide by 4 and set it equal to 91

(108 + 72 + 95 + x)/ 4= 91
multiply both sides by 4 to eliminate fraction

108 + 72 + 95 + x= 364
275 + x= 364

subtract both sides by 275
x= 89

ANSWER: The scored needed for the fourth game is 89.

Hope this helps! :)