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OpenStudy (anonymous):
f(x)=7x+9 find f(6c-4) a. 35c + 9 c. 42c – 19 b. 42c + 9 d. 42c + 19
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OpenStudy (hyper):
Answer: c or 42c -19 Solution: subbing x = 6c -4 into f(x), the expression become 7(6c -4) + 9 = 42c -28 + 9 = 42c -19
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