SOLUTION: I have an 80% in my my, and my final exam is worth 20% of my final grade. What grade do I need to get on my final exam to get a 80% in the class?

Algebra ->  Average -> SOLUTION: I have an 80% in my my, and my final exam is worth 20% of my final grade. What grade do I need to get on my final exam to get a 80% in the class?       Log On


   



Question 547173: I have an 80% in my my, and my final exam is worth 20% of my final grade. What grade do I need to get on my final exam to get a 80% in the class?

Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
example: 100 points for class
80 for everything before final exam and 20 for exam
.8(80)=64
((64+x)/100)100=80%
64+x=80
16=x
16/20=80%
so u need an 80% grade to keep an 80%in the class
since you gave no values i cannot determin the exact score but basically its .8%28T%29=G
.8 times total points = amount of points needed on test.