Question

please help 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

Answer 1

@DanJS

Answer 2

@DullJackel09

Answer 3

@Donblue

Answer 4

@queen-of-tokyo

Answer 5

are you able to evaluate f(x) when x = 3 ?

Answer 6

yes its 21 right?

Answer 7

are u there?

Answer 8

correct, f(3) = 21

Answer 9

how about the value of g(3) ?

Answer 10

-4?

Answer 11

very good

Answer 12

now just add the values of f(3) and g(3)

Answer 13

this works because

(f+g)(x) = f(x) + g(x)
(f+g)(3) = f(3) + g(3)

Answer 14

17 times 3?

Answer 15

add

Answer 16

4
17
25
31

Answer 17

(f+g)(3) = f(3) + g(3)
(f+g)(3) = 21 + (-4)

Answer 18

those are the choices

Answer 19

what do you mean by 17 times 3 ?

Answer 20

because 21 +-4 is 17

Answer 21

which is your answer

Answer 22

I'm not sure why you are multiplying by 3

Answer 23

because( f+g)(3

Answer 24

u have to multiply by 3 after u add em right?

Answer 25

the notation `(f+g)(3)` does NOT mean `(f+g) times 3`

Answer 26

f(3) does not mean f times 3

it means "replace every x with 3, then evaluate"

Answer 27

ok could u tell me what it means

Answer 28

o ok

Answer 29

(f+g)(3) is just another function that is evaluated at x = 3

Answer 30

so its 17?

Answer 31

yes, that is correct

Answer 32

can u help with 1 more?

Answer 33

sure

Answer 34

ill create new thread then tagu

Answer 35

ok