what is my avarage plz help?

Is the 64% with or without the 80% added on? If it already includes the 80%, and you get 100 on your exam you will have an 84%, because 100 x 0.2=20 points,

so 64% + 20%= 84%

If you get a 90% you will have 90% x 0.2=18 so 64%+ 18%= 82%.

If it does not include the 80% added on then it would be 64 x 0.8= 51.2%, and if you were to get 100% your mark would be 51.2% + 20%= 71.2%.

xoxoxox

mwaz

lotta luvvies

Hailey

equation:

(64*0.8)+(100*0.2)

the 100 u could replace with any number that u think ull get on the final, and solve the equation to get ur final grade in the class.

with a 100% on the final u would get a 71.2% in the class!

*= multiplication

if you get 100 on your final you will have a 81 %

if you get 90 on your final you will have a 79%

if you get 80 on your final you will have a 77%

Edit: my math was off; Alana has the right answer.

Second edit: Yeah, my mind was simply not into it, obviously :S

71% (and change) is correct.