What is the value of f(x) = 9x when x = -2?

 The required value of f(x) when x = -2 is -18.

Step-by-step explanation:  We are given to find the value of f(x) when x = -2 where f(x) is defined as follows :

To find the required value, we must substitute x = -2 in equation (i).

So, putting x = -2 in equation (i), we get

Thus, the required value of f(x) when x = -2 is -18.

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

(- 1, 0 )

step-by-step explanation:

an x- intercept is where the function crosses the x- axis.

to find the x- intercept/s look for the value of x when f(x) = 0

from the given table there are 3 values of x where f(x) = 0

when x = - 1, x = 2, x = 3

the one that is listed is (- 1, 0 )