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DustinMHayes

  • 3 years ago

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

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  1. PhoenixFire
    • 3 years ago
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    Do you know what the distance formula is?

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

  3. PhoenixFire
    • 3 years ago
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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.

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

  5. PhoenixFire
    • 3 years ago
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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

  6. DustinMHayes
    • 3 years ago
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    Is the answer 17

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

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

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

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

  11. DustinMHayes
    • 3 years ago
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    Ok. Thanks for youre help.

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