Answer:
Step-by-step explanation:
21+12g
Theirs a trick to cheat on khan academy
1) Turn off Wifi
2) Go to hint and get the answer
3) Take picture of answer or remember it
4) Go to inspect element ——> arrows that look like this “>>”—> Application—-> Local Storage (click it until it says khan academy .com etc then click that then go to “X” by value and next to it click that then turn on wifi and put the answer
Answer:
Step-by-step explanation:
We want to find 
. 
can be written as 
, so we can now write our original equation as: 
.
We can combine like terms: 
Hope this helps!
I hope this helps you
9=n.n
3.3=n.n
n=3
