egracer
  • egracer
Consider the functions f(x) = 3x2 and g(x) = −2x − 5. What is the value of f[g(−4)]? 9 −31 27 3
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
calculate g(-4) first
egracer
  • egracer
How?
anonymous
  • anonymous
g(-4) = -2 (-4) -5 = 8 - 5 = 3

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anonymous
  • anonymous
now substitute 3 in f(x)
anonymous
  • anonymous
f(3) = 3* 3^2 = 27
anonymous
  • anonymous
so that's the answer
egracer
  • egracer
thank you so much! I think I understand the whole thing now! hopefully ill be able to do the next one on my own haha
anonymous
  • anonymous
Good luck with them!!

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