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Math Help - algebra 2 question

  1. #1
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    algebra 2 question

    well this problem seems pretty long. can someone show me this step by step?

    If f(x)= -4x+2x-3, evaluate:

    f(y+1) and 2f(5)

    the first thing i did was get these:

    -4(y+1)+2(y+1)-3=??

    2[-4(5)+2(5)-3]=??

    if i did something wrong, please tell me. and if not i would like to see how it is done. thanks.
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  2. #2
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by nike23 View Post
    well this problem seems pretty long. can someone show me this step by step?

    If f(x)= -4x+2x-3, evaluate:

    f(y+1) and 2f(5)

    the first thing i did was get these:

    -4(y+1)+2(y+1)-3=??

    2[-4(5)+2(5)-3]=??

    if i did something wrong, please tell me. and if not i would like to see how it is done. thanks.
    They're both set up properly. Now simplify them!
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  3. #3
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    Thumbs up What answer have you got

    What answer have you got?
    Varify the same. all the best.

    Quote Originally Posted by nike23 View Post
    well this problem seems pretty long. can someone show me this step by step?

    If f(x)= -4x+2x-3, evaluate:

    f(y+1) and 2f(5)

    the first thing i did was get these:

    -4(y+1)+2(y+1)-3=??

    2[-4(5)+2(5)-3]=??

    if i did something wrong, please tell me. and if not i would like to see how it is done. thanks.
    Follow Math Help Forum on Facebook and Google+

  4. #4
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    for the 2[-4(5)+2(5)-3], i came up with -186.
    and the first one, im not sure how i should evaluate it. the last thing i put was:
    -4y+6y+5, how much further should i go?
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  5. #5
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by nike23 View Post
    for the 2[-4(5)+2(5)-3], i came up with -186.


    and the first one, im not sure how i should evaluate it. the last thing i put was:
    -4y+6y+5, how much further should i go?
    I get -4y^2-6y-5...
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