jarrettmarsha jarrettmarsha
  • 20-02-2021
  • Mathematics
contestada

What's ƒ(g(x)) if ƒ(x) = 3x + 7 and g(x) =6x – 5?

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altavistard
altavistard altavistard
  • 21-02-2021

Answer:

ƒ(g(x)) = 18x - 8

Step-by-step explanation:

We're looking for the composition of f and g, in which function g is the input to function f.  Literally replace "x: in f(x) with g(x) = 6x - 5:

ƒ(g(x)) = 3(6x - 5) + 7, or, after simplification,

ƒ(g(x)) = 18x - 15 + 7, or 18x - 8

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