I really need help with pls help

1. A

2. B

3. D

The square root of 28 is equivalent to 2 x the square root of 7

the square root of 252 is equivalent to 6 x the square root of 7

the square root of 36 is 6

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