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anonymous

  • 4 years ago

3. The diagonals of an isosceles trapezoid ,BD and AC, are labeled 5x and 3x + 40. Find the length of the diagonals. 3. The diagonals of an isosceles trapezoid ,BD and AC, are labeled 5x and 3x + 40. Find the length of the diagonals. @Mathematics

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  1. anonymous
    • 4 years ago
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    5

  2. anonymous
    • 4 years ago
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  3. anonymous
    • 4 years ago
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    how did you get 5

  4. anonymous
    • 4 years ago
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    becuz i am awesome

  5. anonymous
    • 4 years ago
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    .........

  6. anonymous
    • 4 years ago
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    can you please show me how to do it...?

  7. anonymous
    • 4 years ago
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    do not second guess me mortal

  8. anonymous
    • 4 years ago
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    I guess it to be 20

  9. anonymous
    • 4 years ago
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    ............ in any other case i would come back at you with disgust for mortals but i really have to get this done so can you please help me

  10. anonymous
    • 4 years ago
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    ok i shall help you

  11. anonymous
    • 4 years ago
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    i think my work here is done

  12. anonymous
    • 4 years ago
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    o.O dear shabeer please help

  13. anonymous
    • 4 years ago
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    diagonals of an isosceles trapezoid are equal in length

  14. anonymous
    • 4 years ago
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    As this is an isosceles trapezoid the line segments AD and BC are equal in length. So I suppose Diagonal to be equal and 5x = 3x+40. A linear equation in one variable.

  15. anonymous
    • 4 years ago
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    5x and 3x + 40. so 5x = 3x + 40 5x - 3x = 40 x = 40/2 x = 20

  16. anonymous
    • 4 years ago
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    so 5x = 5*20 = 100 3x + 40 = 3*20 + 40 = 60 + 40 = 100

  17. anonymous
    • 4 years ago
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    Your right, Harikat. I too wanted to type the same thing.

  18. anonymous
    • 4 years ago
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    Ohh.... we were working on parallel tracks....☺

  19. anonymous
    • 4 years ago
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    lozl the both of u r so cute haha

  20. anonymous
    • 4 years ago
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    In your profile : you said you hate math. It's such an excellent subject. It's my favourite

  21. smartbrain
    • 5 months ago
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    @Atsie this is a question I am stumbled on.

  22. smartbrain
    • 5 months ago
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    In this step 5x and 3x + 40. so 5x = 3x + 40 5x - 3x = 40 In this step why did they switch the equals sign and how do you know its minus not plus. @Atsie x = 40/2 x = 20

  23. Atsie
    • 5 months ago
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    @smartbrain I gotta go right now, I'll be back in an hour and then I'll answer ok?

  24. smartbrain
    • 5 months ago
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    I will probably be gone, but sure, that will help explain it. Ill see if somebody else can explain it meanwhile.

  25. smartbrain
    • 5 months ago
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    @AihberKhan can you possibly explain?

  26. AihberKhan
    • 5 months ago
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    @smartbrain Okay, so they are simply subtracting \(3x\) from both sides. Since they are subtracting, the positive \(3x\) becomes negative. You see? Also, they did not switch the equals sign they subtracted \(3x\) from both sides.

  27. smartbrain
    • 5 months ago
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    How did they conclude that the 3x is to be subtracted from both sides and not the 5x?

  28. AihberKhan
    • 5 months ago
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    If the \(5x\) is subtracted from both sides, then there will only be ONE side! Because if the \(5x\) was subtracted it would be \(=3x - 40 - 5x\) which simply can't happen.

  29. smartbrain
    • 5 months ago
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    I see, so you are trying to eliminate the x in the problem? Right?

  30. AihberKhan
    • 5 months ago
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    You are not trying to eliminate it. You are trying to isolate it. :) @smartbrain

  31. smartbrain
    • 5 months ago
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    Ok this answers my question. Thank you.

  32. AihberKhan
    • 5 months ago
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    No problem! :) Hope this helped! Have a great day! :) Also a medal would be much appreciated! Just click best response next to my answer. Thank You! Also, a fan will be much appreciated as well! Just hover over my avatar and click “Become a fan”. This will tell you whenever I am online so you can ask me for help in any of your other questions! If you see that I am online and need help with a question, just tag me in your question! @smartbrain

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