For the given functions f and g, find the requested function and state its domain. Write the domain in interval notation.f(x) = 9 - 7x; g(x) = -5x + 7;Find f + g.

A. (f + g)(x) = -5x + 9; (-?, ) ? (, ?)
B. (f + g)(x) = 4x; (-?, ?)
C. (f + g)(x) = -2x + 16; (-?,  ? , ?)
D. (f + g)(x) = -12x + 16; (-?, ?)


Answer: D

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