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DustinMHayes Group Title

Use the distance formmula to find the distance between point B (-3,-8) and point C (2,4).

  • 2 years ago
  • 2 years ago

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  1. PhoenixFire Group Title
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    Do you know what the distance formula is?

    • 2 years ago
  2. DustinMHayes Group Title
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    yes but I'm confused as to where to put the numbers in.

    • 2 years ago
  3. PhoenixFire Group Title
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    \[d=\sqrt{x^2+y^2}=\sqrt{(x_1-x)^2+(y_1-y)^2}\] You have two points, find the change in x and change in y, and put into the formula.

    • 2 years ago
  4. DustinMHayes Group Title
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    is -3 -8 x1 and y1

    • 2 years ago
  5. PhoenixFire Group Title
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    it shouldn't make a difference since it's squared. But usually if you want to find the distance from B to C, your x1y1=C and xy=B

    • 2 years ago
  6. DustinMHayes Group Title
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    Is the answer 17

    • 2 years ago
  7. PhoenixFire Group Title
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    \[dist=\sqrt{(2+3)^2+(4+8)^2}=\sqrt{25+144}=\sqrt{169}=13\]

    • 2 years ago
  8. DustinMHayes Group Title
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    My distance formula says you subtract x 2 and x 1

    • 2 years ago
  9. PhoenixFire Group Title
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    yup. \[2-(-3)=2+3=5\]

    • 2 years ago
  10. PhoenixFire Group Title
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    \[4-(-8)=4+8=12\] Double negative becomes a positive.

    • 2 years ago
  11. DustinMHayes Group Title
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    Ok. Thanks for youre help.

    • 2 years ago
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