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anonymous

  • one year ago

Given the functions f(x) = 7x + 13 and g(x) = x + 2, which of the following functions represents f[g(x)] correctly?

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  1. anonymous
    • one year ago
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    f[g(x)] = 7x + 15 f[g(x)] = 7x + 27 f[g(x)] = 7x2 + 15 f[g(x)] = 7x2 + 27

  2. welshfella
    • one year ago
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    |dw:1439833984917:dw|

  3. welshfella
    • one year ago
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    you replace the x in f(x) by g(x)

  4. anonymous
    • one year ago
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    So the answer would be C?

  5. welshfella
    • one year ago
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    then simplify

  6. welshfella
    • one year ago
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    no

  7. welshfella
    • one year ago
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    the 7 multiplies the whole of x + 2 not just the x

  8. anonymous
    • one year ago
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    alright to be honest I still dont quite understand, and I dont want you to just give me the answer but im confused

  9. welshfella
    • one year ago
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    instead of x we have x +2 so its 7(x + 2) + 13 the x+2 must be put into parentheses

  10. welshfella
    • one year ago
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    now distribute the 7 over the x = 2 in the parentheses

  11. welshfella
    • one year ago
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    * x + 2

  12. anonymous
    • one year ago
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    ohh alright that makes it easier, seeing the actual equation written out helped

  13. anonymous
    • one year ago
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    7x+14+13?

  14. welshfella
    • one year ago
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    yea

  15. welshfella
    • one year ago
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    now add 13 and 14 and you have it

  16. anonymous
    • one year ago
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    alright so the answer is B. Thank you so much for your help :). Ill give you a medal

  17. welshfella
    • one year ago
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    yes B is correct

  18. anonymous
    • one year ago
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    Thank you so much for your help!

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