Given f(x) = 3x-10 and g(x) = 12x +8, solve for (f+g)(x) a. (f+g)(x) = 15x-2 b. (f+g)(x) = 9x-2 c. (f+g)(x) = 15x+2 d. (f+g)(x) = 36x^2-120x

The correct answer is A) (f+g)(x) = 15x - 2

Step-by-step explanation:

In order to complete a composite addition function, you need to add the two functions together combining like terms.

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

(f+g)(x) = 3x - 10 + 12x + 8

(f+g)(x) = 15x - 2

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!