## Answers

Solution below. (sorry for the handwriting)

Note that you are given the following data:

You are asked of the 1st term(A1) and the common difference(d).

In finding the nth term of an arithmetic progression, we use the formula:

Using the given data we'll have:

In finding the Sum of all the terms, we use the formula:

Substituting the given values we'll have:

Substitute equation 1 to equation 2