ANSWER
Step-by-step explanation
We have that Sammi has $125.75 in her account and deposits (adds) $25.50 every month for 6 months.
To find how much is there after 6 months, first, find out how much she added to the account and then add that to the initial amount that was there.
After 6 months she deposited:
Now, add that to the initial amount there:
That is the amount in the account at the end of 6 months.