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anonymous

  • 4 years ago

Laura

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  1. anonymous
    • 4 years ago
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    |dw:1327468722698:dw| The figure is a right square. Solve for x.

  2. anonymous
    • 4 years ago
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    so it would be (4x^2 + x - 37) * (-x^2 +x +43) right?

  3. anonymous
    • 4 years ago
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    yes! :)

  4. anonymous
    • 4 years ago
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    Sorry, I can't write with a mouse very well

  5. anonymous
    • 4 years ago
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    You have to just multiply it all out. So start with the first term and multiply it. I'll get you started

  6. anonymous
    • 4 years ago
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    Or, rather, use the distributive property

  7. anonymous
    • 4 years ago
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    I do know that it is 4x^2+x-37=x^2+x+43 Is it?

  8. anonymous
    • 4 years ago
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    sorry, I gave you the equation for area. Hold on. Do you know the area?

  9. anonymous
    • 4 years ago
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    Yes, it is lw right?

  10. anonymous
    • 4 years ago
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    is this how it was originally set up? I think we're missing some info

  11. anonymous
    • 4 years ago
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    Sorry for the hassle! and this is all there is

  12. anonymous
    • 4 years ago
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    You're right, it would be lw, but we have nothing to equal lw to!

  13. anonymous
    • 4 years ago
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    hmmm

  14. anonymous
    • 4 years ago
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    It says: "The figure in the diagram is regular. Solve for x and find the perimeter."

  15. anonymous
    • 4 years ago
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    regular meaning all angles and sides are congruent

  16. anonymous
    • 4 years ago
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    You're right, set the two trinomials equal to each other! So Start with that

  17. anonymous
    • 4 years ago
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    4x^2+x-37=x^2+x+43

  18. anonymous
    • 4 years ago
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    don't forget the (-) in front of x^2

  19. anonymous
    • 4 years ago
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    4x^2+x-37=-x^2+x+43 And then I am stuck at this point

  20. anonymous
    • 4 years ago
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    ok, well, add x^2 to both sides. what do you get?

  21. anonymous
    • 4 years ago
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    3x^2+x-37=x+43

  22. anonymous
    • 4 years ago
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    add, not subtract

  23. anonymous
    • 4 years ago
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    Oops, sorry! 5x^2+x-37=x+43

  24. anonymous
    • 4 years ago
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    oK good. Now let's tackle the x terms. What should you do?

  25. anonymous
    • 4 years ago
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    do they cancel out?

  26. anonymous
    • 4 years ago
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    yep!!

  27. anonymous
    • 4 years ago
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    so what's next?

  28. anonymous
    • 4 years ago
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    so 5x^2=80?

  29. anonymous
    • 4 years ago
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    yep!! great job

  30. anonymous
    • 4 years ago
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    next step?

  31. anonymous
    • 4 years ago
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    divide by 5?

  32. anonymous
    • 4 years ago
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    for 80

  33. anonymous
    • 4 years ago
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    yep

  34. anonymous
    • 4 years ago
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    oh and x=4??

  35. anonymous
    • 4 years ago
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    yep!

  36. anonymous
    • 4 years ago
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    so what's the perimeter?

  37. anonymous
    • 4 years ago
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    oh okay! Thanks so much, I really appreciate that you didn't leave me even though you wanted to go to bed and for helping me :)

  38. anonymous
    • 4 years ago
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    124 units!

  39. anonymous
    • 4 years ago
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    You're welcome!

  40. anonymous
    • 4 years ago
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    is it correct?

  41. anonymous
    • 4 years ago
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    yep!

  42. anonymous
    • 4 years ago
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    I think you got it!

  43. anonymous
    • 4 years ago
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    ok thanks again :) hope you have a good night!

  44. anonymous
    • 4 years ago
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    you too!

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