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cost functions and linear programming

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Write a cost function for the problem.

1. A moving firm charges a flat fee of $40 plus $35. Let C(x) be the cost in dollars of using the moving firm for x hours.

2. Use the echelon method to solve the system

3x - 3y = 33
8 5 = 80

Please see the attached for further details of problems. It is a total of 20 problems.

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