To find this:
<span>x = -1.3333333333333... </span>
<span>Multiply by 10: </span>
<span>10x = -13.3333333333... </span>
<span>Subtract x = 1.3333333333333333....: </span>
<span>9x = 12. </span>
<span>Divide by 9: </span>
<span>x = 12/9 = 4/3.</span>
Answer:

Step-by-step explanation:
Given


Required
Determine the profit function
This is calculated as follows:

Substitute values for R(x) and C(x)

Open bracket

Collect like terms

