Answer:
s + 12d
Explanation:
total money = money already saved + money she adds
money already saved = s
total money = money already saved + money she adds
total money = s + money she adds
she adds d dollars per week for 12 weeks, so she will add a total of 12 * d, or 12d.
money she adds = 12d
total money = s + money she adds
total money = s + 12d
Answer: s + 12d