Question

Given the following functions f(x) and g(x), solve (f + g)(3) and select the correct answer below:

f(x) = 6x + 3
g(x) = x − 7
4
17
25
31

Answer 1

(f+g)(3) = f(3) + g(3) = 6(3) + 3 + 3 -7 = 18 +6 -7 = 17.

Answer: 17

Answer 2

Option B is correct

`(f+g)(3)` = 17

Explanation:

Given the functions:

f(x) = 6x+3

g(x) = x-7

Solve:
`(f+g)(3)`

First do:

`(f+g)(x) = f(x)+g(x)`

Substitute the given values we have;

`(f+g)(x) = 6x+3+x-7 = 7x-4`

Put x = 3 above we have;

`(f+g)(3) = 7(3)-4 = 21-4=17`

Therefore, the value of
`(f+g)(3)` is 17