anonymous
  • anonymous
given the following functions f(x) and g(x) solve f[g(7)] f(x) = 4x + 21 g(x) = 2x + 2 HELP IM SO CONFUSED I JUST NEED SOMEONE TO LAY IT ALL OUT
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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freckles
  • freckles
Do you know how to find g(7)?
anonymous
  • anonymous
No I don't know how to do any of it @freckles I need someone to kinda lay the whole thing out to me
freckles
  • freckles
g(x)=2x+2 g(7) means we should replace x's with 7's g(7)=2(7)+2

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anonymous
  • anonymous
Is it 85? Because g(7)=16. Plug in 16 for x in f which equals 85.
freckles
  • freckles
do you know how to simplify 2(7)+2?
anonymous
  • anonymous
You should start with what is in the parenthesis which is g(7). For that you simply plug in 7 for x.
anonymous
  • anonymous
85 is a choice.
anonymous
  • anonymous
The answer is 85. Because after you get g(7)=16. you plug in 16 for x in f(g)
anonymous
  • anonymous
16x4=64 64+21=85

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