Hurry help if U understand I can’t let me teacher see this cuz when u find answers online it shows and who asked for the answer

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons

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