Step-by-step explanation:
Add all of the numbers together
7 + 9 + 0 + (-9) + (-7)
simplify it down to:
(7+9+0)= 16
-9 + (-7)= - 16
So, -16 + 16 = 0
then divide 0 by 5 to get the answer of 0
To find the mean you have to add all of the numbers together and then divide by the amount of numbers that you have.
Answer:
33
Perimeter = sum of all sides
; 2 + 9 + 11 + 2 + (11 - 2)
; 33
40
34 to 40 eaasssy i think ims ry if wrong or it might be 35
