Can some one me with this i so confused

Which formula gives the area of a triangle? a=1/2(b+h)

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

Binh says the point of intersections is (0,-3) which statements identify the errors binh made , check all that apply