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anonymous

  • 5 years ago

fish tank's design specifies a length that is 8inches longer than the width. Height of the tank is to be 5inches longer than the width. Let w represent the width and write expression for the volume of the tank in terms of w. (8+w)(5+w) 40+8w+5w+w^2 my answer is: w^2+13w+40 is that right?

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  1. anonymous
    • 5 years ago
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    Why on earth are these questions getting you to expand brackets? Factorised expressions look so much nicer <3

  2. radar
    • 5 years ago
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    Seems volume involves a cube as volume will be in cubic inches.

  3. radar
    • 5 years ago
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    Hey you didn't use the width for width

  4. radar
    • 5 years ago
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    multiply your answer by width

  5. amistre64
    • 5 years ago
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    w ( w^2+13w+40) :)

  6. anonymous
    • 5 years ago
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    which is what? ok i see

  7. radar
    • 5 years ago
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    Good.

  8. anonymous
    • 5 years ago
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    so the answer is w(w^2+13w+40) or do i need to take w times everything inside the ()?

  9. radar
    • 5 years ago
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    You just did :)

  10. radar
    • 5 years ago
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    Yes, the w is distributed to every term in the ()

  11. anonymous
    • 5 years ago
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    I'd either leave it as w(w+5)(w+8) or w^3 + 13w^2 + 40w Pick one of the other, don't get stuck in the middle.

  12. radar
    • 5 years ago
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    Is it satisfactory to your understanding?

  13. anonymous
    • 5 years ago
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    yes

  14. radar
    • 5 years ago
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    Great, I am out to lunch. good luck.

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spraguer (Moderator)
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