After receiving yet more raises, Greg decides to invest 10% of his pre-tax annual income in a retirement fund. He needs to pay 30% income tax on his remaining income, and the remainder represents his take-home pay. If his annual take-home pay is $6,300, what is Greg's annual pre-tax income?

This is so hard and it’s for a test

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

4. a single woman uses an online cash flow calculator which reveals a cash flow of 203. what does this mean?