For the given functions f and g, find the requested function and state its domain.f(x) = 6x - 7; g(x) = 7x - 1Find f ? g.
A. (f ? g)(x) = 13x2 - 55x - 8; all real numbers
B. (f ? g)(x) = 42x2 - 50x + 7; {x|x ? 7}
C. (f ? g)(x) = 42x2 - 55x + 7; all real numbers
D. (f ? g)(x) = 42x2 + 7; {x|x ? 7}
Answer: C
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A. 
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