Question

PLS help ASAP I’d appreciate it, i have no idea how to do this

Answer 1

The correct answer is D.

The symbol you are looking at is sigma, which means sum of all. Because the number on the bottom is 1 and the top is 6, these are the start and end numbers for our n value. Therefore, it means to add together all of the values of your expression (n -3), for all of the values with n equaling between 1 and 6. So let's plug in all of the numbers for n they ask for and see what we have.

1

1 - 3 = -2

2

2 - 3 = -1

3

3 - 3 = 0

4

4 - 3 = 1

5

5 - 3 = 2

6

6 - 3 = 3

Now, when we add all of these numbers up, we look for the answer.

-2 + -1 + 0 + 1 + 2 + 3 = 3

This is the answer we see in D