We have the formula: (spending : sum of spending) . 100 = ......
S=(n/2)(A+t)
x2 x2
2S=n(A+t)
--- --------
n n
2S n(A+t)
---=---------
n n
2S
---=A+t
n
.....2S
A=----- -t
......n
Yes!
-5 - 2 = -7;
-12 - (-5) = -7;
-19 -(-12) = -7;
-26 -(-19) = -7.
You need to show the question i cant see it anywhere?
