8Z What is the variable?

a letter in a math problem

Z

Step-by-step explanation: a variable is a symbol which works as a placeholder for expression or quantities that may vary or change, the number with it is the coefficient, hope this helps good luck

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