Sarah5678
Sarah5678 Sarah5678
  • 21-09-2020
  • Mathematics
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Need help understanding this problem please

Need help understanding this problem please class=

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LammettHash
LammettHash LammettHash
  • 21-09-2020

f(g(x)) is a composite function:

[tex]f(g(x))=f(\sqrt{x+5})=2\sqrt{x+5}-1[/tex]

Plug in x = 4:

[tex]f(g(4)) = 2\sqrt{4+5}-1=2\sqrt9-1=2\cdot3-1=\boxed{5}[/tex]

so the answer is C.

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