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MyDilemma

  • one year ago

Can someone help me understand this? "the midpoint of uv is (5, -11). The coordinates of one endpoint are U(3, 5) find the coordinates of endpoint v"

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  1. misssunshinexxoxo
    • one year ago
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    y=mx+b y=ΔyΔxx+b y=y2−y1x2−x1x+b y=(−11)−55−3x+b y=−162x+b y=−8x+b substitute in a point to figure out b (I'll put U in). 5=(−8)(3)+b 5=−24+b b=29 So the equation of you're line is: y=−8x+29 Now the symmetry part: The midpoint is +2 in the x direction, so add another 2 to the midpoint to get V's x coordinate. y3=−8x3+29 y3=−8(7)+29 y3=−56+29 y3=−27 V should be (7, -27) s=(Δy)2+(Δx)2−−−−−−−−−−−−√ s=(y2−y1)2+(x2−x1)2−−−−−−−−−−−−−−−−−−√ s=(−11−5)2+(5−3)2−−−−−−−−−−−−−−−−−√ s=(−16)2+(2)2−−−−−−−−−−−√ s=256+4−−−−−−√ s=260−−−√ midpoint to V s=(Δy)2+(Δx)2−−−−−−−−−−−−√ s=(y3−y2)2+(x3−x2)2−−−−−−−−−−−−−−−−−−√ s=((−27)−(−11))2+(7−5)2−−−−−−−−−−−−−−−−−−−−−−√ s=(−16)2+(2)2−−−−−−−−−−−√ s=256+4−−−−−−√ s=260−−−√

  2. misssunshinexxoxo
    • one year ago
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    If you have any questions here to help!

  3. MyDilemma
    • one year ago
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    Okay thank you so much!(:

  4. MrNood
    • one year ago
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    |dw:1435010934140:dw| WOW That seems a complicated explanation for a simple concept The midpoint is middle of UV in both X and Y direction SO Find how far to move from end poit to midpoint in x then add the same amount again Find out how far to move from endpoint ot midpoint in Y then add the same amount again. (Note value to 'add' may be negative)

  5. MyDilemma
    • one year ago
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    Thank you

  6. MyDilemma
    • one year ago
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    @missunshinexxoxo can you help me with one more?

  7. MyDilemma
    • one year ago
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    Find the distance between points m(6, 16) and z(-1, 14) to the nearest tenth

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