Answer:
The angle ZLK has a value of 75 degrees.
Step-by-step explanation:
We can calculate this as:

We replace the angles values in the equation, as both angles that are formed with Z (MLZ and ZLK), when added, gives as the angle MLK. This allows us to calculate x. The value for x is -11.
Then, with the value for x we can calculate any of both angles.
8pm to 2am, or 8am to 2pm, either way, Carla would've worked for 6 hours.
6*$13=$78
-----------
Carla would earn $78 if she were to clean for 6 hours.
Subtract 18 from 72 to get Michelle's current age.
72 - 18 = 54