A practical application of subtracting polynomials is finding the profit function P(x) for a business given the revenue function R(x) and the cost function C(x). Profit = Revenue - Cost
P(x) = R(x) - C(x)

3. The cost function for a company to produce armbands is C(x) = 2x + 5000, where x is the number of armbands. The company sells the armbands for $7 each. Write the revenue function and the profit function for the company.

x=6 and x=3

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answer: it is d

step-by-step explanation:

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places

113.42

i hope that is right.

step-by-step explanation: