Answer:
To find out how much money is in Alex's account at the end of the week, we need to add up all of the transactions that he made over the course of the week.
We start by adding the initial amount that Alex had in his account before making any transactions, which is $170.42.
Then we add the first transaction, which is $50.73. This brings the total to $221.15.
Next, we add the second transaction, which is $114.13. This brings the total to $335.28.
Then we add the third transaction, which is $119.69. This brings the total to $455.97.
Finally, we add the fourth and last transaction, which is $226.71. This brings the total to $682.68.
Therefore, at the end of the week, Alex has $682.68 in his account.
Explanation: