8. A company has a fixed cost of $30000 and a production cost of $6 for each disposable camera. Each camera sells for $10.
a) Form the cost function
b) Form the revenue function

i believe that the answer is

b. y-1=-2(x-4)

hope this !

step-by-step explanation:

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15