Question

If f(x) = 2(x − 5), find f(8).

4
6
8
16

Please help

Answer 1

Answer: The correct option is (B) 6.

Step-by-step explanation: We are given the function f(x) defined as follows :

`f(x)=2(x-5)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)`

We are to find the value of f(8).

To find the value of f(8), we must substitute x = 8 in equation (i).

Therefore, the value of f(8) is given by

`f(8)\\\\=2(8-5)\\\\=2*3\\\\=6.`

Thus, the required value of f(8) is 6.

Option (B) is CORRECT.

Answer 2

f(8) = 6

Explanation:

Given function is:

`f(x) = 2(x-5)`

In order to find the value of a function on a particular input, the variable in the function is replaced with the value.

We have to find f(8), so putting 8 in place of x

`f(8) = 2(8-5)\\=2(3)\\=6`

So the value of function at 8 is 6 ..