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anonymous

  • one year ago

Functions HELP!!!

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  1. anonymous
    • one year ago
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    Given the following functions f(x) and g(x), solve (f + g)(3) and select the correct answer below: f(x) = 2x + 21 g(x) = x − 24 A.) −27 B.) −21 C.) 6 D.) 48

  2. anonymous
    • one year ago
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    @dan815 @Data_LG2 @phi @Mchilds15 @LynFran

  3. phi
    • one year ago
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    (f + g)(3) is short for f(3) + g(3) can you find f(3) ?

  4. anonymous
    • one year ago
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    f(x) = 27

  5. phi
    • one year ago
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    you mean f(3)= 27 (f(x) would be the formula 2x+21)

  6. phi
    • one year ago
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    now find g(3)

  7. anonymous
    • one year ago
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    Yes and g(3) = -21

  8. phi
    • one year ago
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    now add

  9. anonymous
    • one year ago
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    C.) 6

  10. anonymous
    • one year ago
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    I need help with some more, if you don't mind.

  11. anonymous
    • one year ago
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    Given the functions f(x) = 10x + 25 and g(x) = x + 8, which of the following functions represents f[g(x)] correctly? f[g(x)] = 10x + 33 f[g(x)] = 10x2 + 33 f[g(x)] = 10x + 105 f[g(x)] = 10x2 + 105

  12. phi
    • one year ago
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    yes the other way to do this is first add f(x)+g(x) like this: 2x + 21 + x-24 and we get (f+g)(x)= 3x - 3 now figure out (f+g)(3) = 3*3-3 = 9 - 3 = 6

  13. phi
    • one year ago
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    starting with f(x) = 10x + 25 we can say f(a) = 10a+25 f(b*b)= 10*b*b+25 f(xyz)= 10*xyz+25 following that pattern, what is f( g(x) ) ?

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