11. the coordinates of endpoint a are a(5, -15). the midpoint of ac is b(5, -8). find the coordinate of endpoint c. (1 point work, 1 point x2, one point y2)
12. find the distance between a(12, 6) and b(-8, 18). leave your answer in simplest radical form. (1 point work, 1 point answer)
13. find the area of a circle with diameter 8 in. round to the nearest tenth. (1 point answer, 1 point units)

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 - 2xdesmond 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