I need help plz and thank you

Find the domain of the following expression: 1/(√x)-2

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

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