1. Write an equation for the nth term of each arithmetic sequence.

45, 30, 15, 0, ...

Im taking that nth means 9th term so sorry if I am wrong.

1. 2. 3. 4. 5. 6. 7. 8. 9

45, 30, 15, 0, - 15, - 30, - 45, - 60, - 75

So, the 9th term of the pattern is negative 75 because it decreases by 15 each time.