Answer:
8
Step-by-step explanation:
Mean: The sum of all numbers divided by the amount of numbers.
-----------------------------------------------------------------------------------------------
11 + 3 + 9 + 12 + 2 + 11 = 48 divided by 6 equals 8
Using proportion...
length of barn length of tree
-------------------------------- = --------------------------------
length of barn's shadow length of tree's shadow
20 x
---- = ---
12 8
Using cross-multiplication...
20 x 8 = 12x
160 = 12x
x = 13 1/3 or 13.3333
The tree is 13 1/3 meters long.
It is non linear
Hope this helps
This answer has no solution
so all u have to do is mark A -6,-3 and B 5,-3 and C 5,7
and count how far they are from each other .