Muna brought her bike to a shop repair. She was billed $126. The total amount was broken into $21 for parts and $42 per hours. How many hours did it take for the bike to be fixed?

2 hours and 30 minutes

Step-by-step explanation:

126 is the total

from the total subtract the amount for parts

from your answer divide by 42 per hour to get the number of hours she worked

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

step-by-step explanation: