Answer:
3^(n+1) - 3^n / 3^(n-1) = 6
Answer:

General Formulas and Concepts:
<u>Pre-Algebra</u>
- Order of Operations: BPEMDAS
<u>Algebra I</u>
- Slope Formula:

Step-by-step explanation:
<u>Step 1: Define</u>
<em>Find points from graph.</em>
Point (0, -4)
Point (-8, 0)
<u>Step 2: Find slope </u><em><u>m</u></em>
- Substitute:

- Add/Subtract:

- Simplify:

Dont know this sorry.....
/ (divided by) I think it is right
Subtract:
189.95 - 45.00 = 144.95
the cost = 144.95