Answer: 7.2x = 4,000.
Explanation:
If cost is represented by C(x) = 2.2x + 4,000 and revenues are represented by R(x) = 9.4x, the break-even point occurs when the cost equals the revenue, or C(x) = R(x). We can substitute the given equations into this expression and solve for x:
2.2x + 4,000 = 9.4x
7.2x = 4,000
x = 4,000 / 7.2
Therefore, the equation that could be used to find the break-even point is 7.2x = 4,000.