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anonymous

  • one year ago

Consider the functions f(x) = x2 − 13 and g(x) = x + 5. What is the value of f[g(−4)]?

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  1. lalaland_lauren
    • one year ago
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    is that x squared minus 13?

  2. anonymous
    • one year ago
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    Yeeesss ma'am

  3. lalaland_lauren
    • one year ago
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    okay so here's how it goes

  4. lalaland_lauren
    • one year ago
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    \[x^2 - 13 \] \[(x+5)^2 - 13\] \[x^2 + 20x + 25 - 13\] what are the answer choices?

  5. anonymous
    • one year ago
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    −12 3 −13 8 How did you get 20x ?

  6. lalaland_lauren
    • one year ago
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    because of (x+5)(x+5) since it's squared

  7. anonymous
    • one year ago
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    Okay , that makes sense

  8. lalaland_lauren
    • one year ago
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    |dw:1437447950067:dw|

  9. anonymous
    • one year ago
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    So you're using the FOIL method right ?

  10. lalaland_lauren
    • one year ago
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    FOIL? What's that?

  11. anonymous
    • one year ago
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    Sorry , I was thinking of something else . Its another way to figure out polynomials and trinomials and such .

  12. lalaland_lauren
    • one year ago
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    Crap crap crap I did the whole thing wrong, disregard what I said!

  13. lalaland_lauren
    • one year ago
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    I'm redoing the whole problem, give me a minute

  14. anonymous
    • one year ago
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    Hahahaha alrighty

  15. lalaland_lauren
    • one year ago
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    This might take a while lol xD

  16. anonymous
    • one year ago
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    Hahahaha its all good ! xp

  17. anonymous
    • one year ago
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    Consider the functions f(x) = 3x − 2 and g(x) = x2 − 1. What is the value of (f − g)(−2)? Okay, x=(-2) f(-2) =3*(-2) - 2 f(-2) = -6 -2 f(-2) = -8 g(-2) = (-2)^2 − 1 g(-2) = 4 -1 g(-2) = 3 (f-g) = -8 - 3 I think you can figure it out from there.

  18. anonymous
    • one year ago
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    (f − g)(−2) is f[g(−4)] though

  19. lalaland_lauren
    • one year ago
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    \[f(x)=x^2-13\] \[g(x)=x+5\] and you're trying to find f[g(-4)], so since it shows that g(x) = -4, you plug it in, after you plug in the f(g) however, SOOOO \[(x-5)-13\] \[(-4+5) - 13\] got it?

  20. lalaland_lauren
    • one year ago
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    @Skielerlucas04 you're doing it all wrong...

  21. anonymous
    • one year ago
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    So , Im guessing my answer is -12 ?

  22. lalaland_lauren
    • one year ago
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    yup :)

  23. lalaland_lauren
    • one year ago
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    Do you understand it now?

  24. anonymous
    • one year ago
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    sorry, i tried to help

  25. lalaland_lauren
    • one year ago
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    It's fine

  26. anonymous
    • one year ago
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    Thank you so much ! These trinomials drive me crazy ! I understand it 10x more

  27. lalaland_lauren
    • one year ago
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    They drive me crazy too xD are you taking FLVS? because I literally just finished this a few hours ago

  28. anonymous
    • one year ago
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    i am:D

  29. anonymous
    • one year ago
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    I am actually ! Im taking my EOC tomorrow and all my exams I am finally finishing Monday , what a summer break

  30. anonymous
    • one year ago
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    "break"

  31. anonymous
    • one year ago
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    lol i feel ya!!!!!!

  32. lalaland_lauren
    • one year ago
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    What teacher do you have? We might have the same one lol

  33. anonymous
    • one year ago
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    Ya know ! It sucks , but Im happy to get it all finished with && I have Ms. Johnson

  34. lalaland_lauren
    • one year ago
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    I have to finish Algebra 1 Segment 2 and all segments of World History before summer ends *sigh* Aww I have Ms. McManus :(

  35. anonymous
    • one year ago
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    That sucks ! I still have my English 1 to finish including my essay and stuff , Algebra 1 is the worst , Im terrible at math -__- If you ever need help on World History I got ya ! I just finished that !

  36. lalaland_lauren
    • one year ago
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    I've got the collaboration for segment two of english one so I'm basically done lol, and thanks! by any chance do you have 1.02 for world history? I gotta do that xD

  37. anonymous
    • one year ago
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    I got a 96% on it , so I hope it helps !(:

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  38. lalaland_lauren
    • one year ago
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    You're my savior!!!!!! :D

  39. lalaland_lauren
    • one year ago
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    By the way, you can alwaays ask me for help on any of the assessments for algebra, I'm getting A's all over the place lol :)

  40. lalaland_lauren
    • one year ago
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    I can give you the answers to them and stuffsssssss

  41. anonymous
    • one year ago
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    I got chu !(:&& 'heck' yeah lol ! Im on 9.02 right now , Im just now getting used to this module , 8.07 confused me so much though , but I skipped it , Im trying to see if Ill get away with it xp

  42. lalaland_lauren
    • one year ago
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    Well, I haven't done my welcome call yet and I've skipped all the DBA's and tests and I'm already 1/3 through lol! The only assignment I skipped though is 6.06 I think, since I need like 12 people for the scatter plot thing and I'm too shy and socially awkward to ask people if I can measure them lmao

  43. anonymous
    • one year ago
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    Hahahahah trust me I feel you on that ! It is kind of an awkward subject to go up to people and ask , hey can I measure your arm length ?

  44. lalaland_lauren
    • one year ago
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    "And your height too, I promise you this isn't for creepy reasons." XD

  45. anonymous
    • one year ago
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    Hahahahah exactly "just my algebraa teacher wants to know" xD

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