Final answer:
Madison already has $50 and saves $10 each week. To reach $100, she needs $50 more. It will take her 5 weeks to save the extra $50.
Step-by-step explanation:
Madison currently has $50 saved, and she saves an additional $10 each week. To determine how many weeks it will take for her to save a total of $100, we must find the difference between her goal ($100) and what she currently has ($50), which is $100 - $50 = $50. To save the additional $50 by saving $10 each week, we divide the remaining amount she needs to save ($50) by the amount she saves per week ($10).
$50 ÷ $10 = 5 weeks
Therefore, it will take Madison 5 weeks to save a total of $100.