I don't know either. sorry.
-20nx^2-36x-15
There you go
Answer:
a = 14
Step-by-step explanation:
The mean is the sum of the values divided by the number of values.

One way is to move the 4 to other side so it would be x = 13 - 4 and that's x = 9
Answer:
animania-1.12.2-1.6.2.jar