Find the mean deviation from each data set.
(a)
12
6
7
3
15
10
18
5

5

Step-by-step explanation:

you find the mean of the numbers and use the mean and subtract the mean from all of the numbers.

Sorry I am bad at explaining

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2