Me fast it's for my home work and give it in a step by step explanation

Step-by-step explanation:

This is the answer for I)

Just use Pythagorean theorem formula to the tye hypotenuse.

1/2*qr*rs

step-by-step explanation:

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