Someone please please help me!!

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

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 abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d? are he re