The function f is defined above. What is the value of ?

Question

Accepted Answer

Choice C is correct. Adding the like terms x and yields the equation . Substituting 20 for x yields . The product is equal to 25, and the difference is equal to 30. Substituting these values in the given equation gives , and multiplying 25 by 30 results in . Choices A, B, and D are incorrect and may result from conceptual or computational errors when finding the value of .

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