What is the sum of the integers 15, 21, 28, and 31?

To find the sum of the integers 15, 21, 28, and 31, you simply need to add them together.

First, you can break it down step by step:

1. Add the first two numbers:

15 + 21 = 36

2. Then, add the next number to that sum:

36 + 28 = 64

3. Finally, add the last number:

64 + 31 = 95

Therefore, the total sum of those integers is 95. When you look at the options, 95 corresponds to one of the choices provided, confirming that this is the correct answer. This method of sequential addition ensures accuracy and makes it easier to keep track of the totals as you progress.