Help me please

Given abcd ac=38 and ae=3x+4 find the value of x

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

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