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anonymous

  • one year ago

Medal and fan awarded :))) 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 −27 −21 6 48

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  1. anonymous
    • one year ago
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    @Mehek14

  2. welshfella
    • one year ago
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    first add f(x) and g(x)

  3. anonymous
    • one year ago
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    How do I add f(x) and g(x)? This is a brand new topic to me, lol

  4. welshfella
    • one year ago
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    add like terms 2x + 21 + x - 24

  5. welshfella
    • one year ago
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    - simple algebra

  6. anonymous
    • one year ago
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    3 x - 3

  7. welshfella
    • one year ago
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    right now all you need do is plug in x = 3 and work it out

  8. anonymous
    • one year ago
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    f(3) g(3)?

  9. welshfella
    • one year ago
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    3(3) - 3 = ?

  10. anonymous
    • one year ago
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    6

  11. welshfella
    • one year ago
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    right! thats it

  12. welshfella
    • one year ago
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    (f + g)(3) = 6

  13. anonymous
    • one year ago
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    So how do I work that out

  14. welshfella
    • one year ago
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    - you've worked it out 3(3) - 3 = 6

  15. welshfella
    • one year ago
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    (f + g)(3) means the sum of f(x) and g(x) when x = 3

  16. anonymous
    • one year ago
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    So the answer's 6?

  17. welshfella
    • one year ago
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    yes

  18. anonymous
    • one year ago
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    Great :D

  19. welshfella
    • one year ago
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    yw

  20. anonymous
    • one year ago
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    Could you help me with a few more?

  21. welshfella
    • one year ago
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    well i've only got 5 minutes...

  22. welshfella
    • one year ago
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    ok i could help with 1 more

  23. anonymous
    • one year ago
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    Great :)

  24. anonymous
    • one year ago
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    Dishwashers are on sale for 25% off the original price (d), which can be expressed with the function p(d) = 0.75d. Local taxes are an additional 14% of the discounted price, which can be expressed with the function c(p) = 1.14p. Using this information, which of the following represents the final price of a dishwasher with the discount and taxes applied? c(p) ⋅ p(d) = 0.855pd c(p) + p(d) = 1.89d c[p(d)] = 0.855d d[c(p)] = 1.89p

  25. welshfella
    • one year ago
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    0.75d - 0.14*0.75d

  26. anonymous
    • one year ago
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    0.645?

  27. anonymous
    • one year ago
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    or is it .14

  28. welshfella
    • one year ago
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    - sorry gotta go right now

  29. anonymous
    • one year ago
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    Darn :(

  30. welshfella
    • one year ago
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    I havent got this clear in my mind yet

  31. anonymous
    • one year ago
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    Thanks for the help :/

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