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Math Help - help please test tomorrow...help me review and find a easy way

  1. #1
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    Unhappy help please test tomorrow...help me review and find a easy way

    henry is fice times as old as his nephew. if the difference between their ages is 48 years what is henry's age?





    three less than twice a number x is equal to 5 more than x. find the number????







    (-2^-3x^-7)(2^5 x^6 y^9)=





    calculate:: x^7y^6z^-5///// x^-4 y^8 z^-8




    2(x^2 y)^0 +(3x^2)^0
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  2. #2
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    Quote Originally Posted by BeBeMala View Post
    henry is fice times as old as his nephew. if the difference between their ages is 48 years what is henry's age?

    h = 5n

    h - n = 48

    solve the system using substitution


    three less than twice a number x is equal to 5 more than x. find the number????

    2x - 3 = 5 + x

    solve for x


    (-2^-3x^-7)(2^5 x^6 y^9)=

    property of exponents ... \textcolor{red}{b^c \cdot b^d = b^{c+d}}


    calculate:: x^7y^6z^-5///// x^-4 y^8 z^-8

    if this is supposed to be division ... \textcolor{red}{\frac{b^c}{b^d} = b^{c-d}}



    2(x^2 y)^0 +(3x^2)^0

    hint ... \textcolor{red}{a^0 = 1}
    ... good luck.
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  3. #3
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    thanx anyways
    Quote Originally Posted by skeeter View Post
    ... good luck.
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  4. #4
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    Talking

    You've posted ten or more exercises with no work shown. The material covers a few weeks or months of material. If you are unable to make any start, then I'm afraid there is little we can do for you. So the helper wasn't being snarky.

    Please reply with your work and reasoning so far, or else specify that you are needing lesson links so that you can spend a week or two in self-study. Thank you!
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  5. #5
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    please I need lesson links
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  6. #6
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    For polynomials and "like terms", try here.

    For exponents and simplification, try here and here.

    For multiplying polynomials, try here.

    To learn how to "translate" word problems, try here.

    To learn how to do "age" type word problems in particular, try here.
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