EMERGENCY! Please give me the correct answer!

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12

Describe how making an ‘and’ compound sentence effects your solution set

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