What is the price per lb of brand X coffee if 8 lb were mixed with 12 lb of brand Y
coffee which costs $9/Ib to make 20 lb of
Mark's special coffee blend which costs
$13/1b?

x = 8/4 = 2

12(2) + 4(6) = 24 + 24 = 48 = 6*8

Step-by-step explanation:

$12X + $6(4) = (X+4)*$8

12X + 24 = 8(x+4)

12x + 24 = 8x + 32

12x + 24 - 8x - 32 = 0

4x - 8 = 0

4x = 8

x = 8/4 = 2

i can't see the picture : /

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1