SOLUTION: For the first three quarters, Angela's averages were 85%, 74% and 78%. what must Angela get in the 4th quarter to have an overall average of 80%?

Algebra ->  Probability-and-statistics -> SOLUTION: For the first three quarters, Angela's averages were 85%, 74% and 78%. what must Angela get in the 4th quarter to have an overall average of 80%?      Log On


   

Question 751987: For the first three quarters, Angela's averages were 85%, 74% and 78%. what must Angela get in the 4th quarter to have an overall average of 80%?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
80-5+6+2=
83
(85+74+78+x)/4=80
x=83