Recursive Formulas Answers

Which recursive formula describes the pattern in the perimeters of the images, where is the perimeter of the nth image?

The amount of money in Nadia’s savings account at the end of n years is represented by the recursive formula . If , what is the balance in Nadia’s account at the end of each of the first two years?

Paige borrows $700 from her parents for a new computer. She repays $100 the first month, and then begins to repay her parents $75 per month. Which recursive formula models the total amount of money still owed, , at the end of the nth month?