Final answer:
The correct equation for determining the number of weeks when Erica and Paolo will have the same amount of money is 30 + 10w = 20 + 15w.
Step-by-step explanation:
The question asks us to determine the number of weeks, w, it will take for Erica and Paolo to have the same amount of money, given Erica has $30.00 saved with a weekly allowance of $10.00, and Paolo has $20.00 saved with a weekly allowance of $15.00. The correct equation to model this situation is 30 + 10w = 20 + 15w, which represents the initial savings of each sibling plus their respective weekly allowance multiplied by the number of weeks. To have the same amount of money, their total savings will be equal after w weeks.