38 faces
Step-by-step explanation:
Amount to be earned = $100
Amount spent on supplies = $16
This is an expenses on the business
Amount charged per face = $3
Let x represent the number of faces to be painted
The total calculation:
Note: $16 was subtracted because it was an expense and to make a profit of $100, it snould not include expenses.
Therefore, the number of faces she needs to paint to meet her $100 goal is 38 faces.