anonymous
  • anonymous
Help Use the functions f(x) = 5x − 12 and g(x) = 11x + 2 to complete the function operations listed below. Part A: Find (f + g)(x). Show your work. (3 points) Part B: Find (f ⋅ g)(x). Show your work. (3 points) Part C: Find f[g(x)]. Show your work. (4 points)
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
anonymous
  • anonymous
anonymous
  • anonymous

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welshfella
  • welshfella
Part A ad like terms:- 5x - 12 + 11x + 2 bring like terms together 5x + 11x - 12 + 2 = ?
welshfella
  • welshfella
can you continue /
anonymous
  • anonymous
I got 16x-10 as the answer, is that right or am i off?
anonymous
  • anonymous
right
anonymous
  • anonymous
So what about B and C? How do i solve those
welshfella
  • welshfella
Part A is correct
welshfella
  • welshfella
Part B multiply;- (5x - 12)(11x + 2)
anonymous
  • anonymous
55x2−122x−24 ?
welshfella
  • welshfella
first multipky the second bracket by 5x then multiply by -12 i;ll start you off: (5x - 12)(11x + 2) = 5x(11x + 2) - 12(11x + 2) = 55x^2 + 10x - ?
welshfella
  • welshfella
yes you are correct
welshfella
  • welshfella
Part C ?
anonymous
  • anonymous
Yes i need help with C
welshfella
  • welshfella
for part C you replace the x in f(x) by g(x)
welshfella
  • welshfella
|dw:1437578275371:dw|
welshfella
  • welshfella
5(11x + 2) - 12 now simplify
anonymous
  • anonymous
I got 55x - 2
welshfella
  • welshfella
yeah! right
anonymous
  • anonymous
Sweet!! Thank you! I've got one more, you think you could help me with that?
welshfella
  • welshfella
good work gotta go right now
anonymous
  • anonymous
Aww darn, thanks for the help
welshfella
  • welshfella
i have to go to pick up my grandson right now.
anonymous
  • anonymous
Safe travels!

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