Please help! im very confused

3d+1=[]

Step-by-step explanation:

first collect the like terms ie 4d-d+9-8

giving you 3d+1

here is the

mark brainliest pl

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2