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anonymous

  • 5 years ago

The length of a rectangle is 1 less than twice its width, and the area of the rectangle is 55ft^2 . Find the dimensions of the rectangle

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  1. amistre64
    • 5 years ago
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    Area = lw l=2w-1 area = (2w-1)(w) 55 = 2w^2 -w 2w^2 -w -55 = 0 this is what i got so far

  2. amistre64
    • 5 years ago
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    w =1/4 +- sqrt(1-(4)(2)(-55))/4 just let me get the calculator... do you know the quadratic formula?

  3. amistre64
    • 5 years ago
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    1/4 +- sqrt(1 + 440)/4 1/4 +- sqrt(441)/4 this better work :)

  4. anonymous
    • 5 years ago
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    so is this the final answer i also need to know the length and width

  5. amistre64
    • 5 years ago
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    1/4 +- 21/4...-21/4 makes no sense, so we can toss it out the window. 1/4 + 21/4 = 22/4 = 11/2 the width of this thing is 11/2 l=2(11)/2-1 = 11-1 = 10 length = 10 width = 11/2 does that make sense? and does it fit?

  6. amistre64
    • 5 years ago
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    55 = (10)(11)/(2) 55 = 110/2 55 = 55 it fits, and its works.... yay!!!

  7. anonymous
    • 5 years ago
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    OMG YOUR AMAZING!!! THANK YOU SO MUCH I JUST FINISHED THE CLASS YOUR AMAZING!!!!!!!!!!!!!!!!!!! AHHHHHHHHHHHHHHHHHHHHH IM JUMPING OUT OF MY CHAIR THANK YOU SO MUCH

  8. amistre64
    • 5 years ago
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    watch out for the ceiling fan :)

  9. anonymous
    • 5 years ago
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    Lol thanks, jocks like me aint built to do math lol

  10. anonymous
    • 5 years ago
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    Thank you so much once again have a great night!

  11. amistre64
    • 5 years ago
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    Ciao :)

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