# What is the sum of the arithmetic sequence 140, 135, 130 , if there are 35 terms?

##### 1 Answer

Jul 13, 2015

If there are 35 terms, the last term will be 34 steps down from the first. The common difference is

#### Explanation:

The last term will be

**Calculating the sum:**

You take the mean between the highest an lowest term, and multiply by the number of terms: