Question 977655
x = score on next test (out of 100)


(first test score + second test score)/2 = average


(71 + x)/2 = 79


71+x = 79*2


71+x = 158


x = 158-71


x = 87


To maintain an average of 79, you need to score <font color="red">87 or higher</font> on the next test.