Respuesta :

Answer:

3

Step-by-step explanation:

f(x) = x - 3

g(x) = x - x

(f + g) = x - 3 + x - x

= x + x - x - 3

= x - 3

(f + g) (6) means that you substitute 6 for x in the result of (f + g)

therefore, (f + g) (6) = 6 - 3

= 3

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