Recursive Formulas — Unit test Answers

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?

What is the common ratio of the geometric sequence below?–96, 48, –24, 12, –6, ...

Which of the following is an arithmetic sequence?