Answer:
Joseph will have 265 coins and Molly will have 275 coins after ten months.
Step-by-step explanation:
Joseph already has 15 coins and adds 25 coins after each month. So after ten months the total number of coins Joseph will have is
coins.
Molly already has 25 coins and adds 25 coins after each month. So after ten months the total number of coins Joseph will have is
coins.
So, Joseph will have 265 coins and Molly will have 275 coins after ten months.