Question 993149
Hi there,
For Sue to attain an 85 average,
the total of her scores must equal
=> 85 x 6 = 510
Adding up her 5 scores:
84 + 80 + 76 + 96 + 80
= 416
510 - 416 = 94
Sue must score 94 on her 6th test 
to get an 85 average.
Hope this helps :-)