Sarah is saving money for a new bicycle. She currently has $50 saved and plans
to save $10 each week until she has enough money for the bicycle. Let's call the cost of the bicycle C. Sarah needs to save an additional amount of money to reach the cost of the bicycle. Since Sarah saves $10 each week, she will need to save an additional (C - $50) dollars.
If she saves $10 each week, then the number of weeks Sarah needs to save the additional amount is given by (C - $50) / $10.
To find the number of weeks, we divide (C - $50) by $10.
Therefore, the number of weeks Sarah needs to save the additional amount is (C - $50) / 10.
Hope this helps! Let me know if you have any further questions.