Answer this i didn't get anything due in 2 !

X+y=-4 x-y=2 use elimination with adding and subtraction

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

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air