Respuesta :

choixongdong

Answer:

15) f(x) + g(x)  = -x + 8

17) f(x) - g(x) = x + 9

Step-by-step explanation:

15)

f(x) = 3x + 5

g(x)= - 4x + 3

Find f(x) + g(x)

f(x) + g(x)  = 3x + 5  + ( - 4x + 3 )

f(x) + g(x)  = 3x + 5   - 4x + 3

f(x) + g(x)  = -x + 8

17)

f(x) = 2x +4

g(x)= x - 5

Find f(x) - g(x)

f(x) - g(x) = 2x +4  - (x - 5 )

f(x) - g(x) = 2x +4  - x +  5

f(x) - g(x) = x + 9

r3t40

[tex]

f(x)=3x+5 \\

g(x)=-4x+3 \\

(f+g)(x)=f(x)+g(x)=(3x+5)+(-4x+3) \\

3x+5-4x+3=\boxed{-x+8} \\ \\

f(x)=2x+4 \\

g(x)=x-5 \\

(f-g)(x)=f(x)-g(x)=(2x+4)-(x-5) \\

2x+4-x+5=\boxed{x+9}

[/tex]

Hope this helps.

r3t40