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anonymous

  • one year ago

please help Given the following functions f(x) and g(x), solve (f + g)(3) and select the correct answer below: f(x) = 6x + 3 g(x) = x − 7

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  1. anonymous
    • one year ago
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    @DanJS

  2. anonymous
    • one year ago
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    @DullJackel09

  3. anonymous
    • one year ago
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    @Donblue

  4. anonymous
    • one year ago
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    @queen-of-tokyo

  5. jim_thompson5910
    • one year ago
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    are you able to evaluate f(x) when x = 3 ?

  6. anonymous
    • one year ago
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    yes its 21 right?

  7. anonymous
    • one year ago
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    are u there?

  8. jim_thompson5910
    • one year ago
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    correct, f(3) = 21

  9. jim_thompson5910
    • one year ago
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    how about the value of g(3) ?

  10. anonymous
    • one year ago
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    -4?

  11. jim_thompson5910
    • one year ago
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    very good

  12. jim_thompson5910
    • one year ago
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    now just add the values of f(3) and g(3)

  13. jim_thompson5910
    • one year ago
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    this works because (f+g)(x) = f(x) + g(x) (f+g)(3) = f(3) + g(3)

  14. anonymous
    • one year ago
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    17 times 3?

  15. jim_thompson5910
    • one year ago
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    add

  16. anonymous
    • one year ago
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    4 17 25 31

  17. jim_thompson5910
    • one year ago
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    (f+g)(3) = f(3) + g(3) (f+g)(3) = 21 + (-4)

  18. anonymous
    • one year ago
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    those are the choices

  19. jim_thompson5910
    • one year ago
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    what do you mean by 17 times 3 ?

  20. anonymous
    • one year ago
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    because 21 +-4 is 17

  21. jim_thompson5910
    • one year ago
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    which is your answer

  22. jim_thompson5910
    • one year ago
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    I'm not sure why you are multiplying by 3

  23. anonymous
    • one year ago
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    because( f+g)(3

  24. anonymous
    • one year ago
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    u have to multiply by 3 after u add em right?

  25. jim_thompson5910
    • one year ago
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    the notation `(f+g)(3)` does NOT mean `(f+g) times 3`

  26. jim_thompson5910
    • one year ago
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    f(3) does not mean f times 3 it means "replace every x with 3, then evaluate"

  27. anonymous
    • one year ago
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    ok could u tell me what it means

  28. anonymous
    • one year ago
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    o ok

  29. jim_thompson5910
    • one year ago
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    (f+g)(3) is just another function that is evaluated at x = 3

  30. anonymous
    • one year ago
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    so its 17?

  31. jim_thompson5910
    • one year ago
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    yes, that is correct

  32. anonymous
    • one year ago
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    can u help with 1 more?

  33. jim_thompson5910
    • one year ago
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    sure

  34. anonymous
    • one year ago
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    ill create new thread then tagu

  35. jim_thompson5910
    • one year ago
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    ok

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