Help me please I need to catch up on a lot of missing assignment!

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? \ 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

What is the ratio fraction form of 25: 9