Answer:
THREE HOURS
Step-by-step explanation:
34.50-12=22.5
22.5/7.50=
=3
Its 12. Part a was 2 part b was 3
6×2=12
4×3=12
For this case we have the following quadratic equation:

The solutions will be given by:

Where:

Substituting the values we have:

We have two roots:

ANswer:

Answer:
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