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



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PhoenixFire
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Do you know what the distance formula is?

DustinMHayes
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yes but I'm confused as to where to put the numbers in.

PhoenixFire
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\[d=\sqrt{x^2+y^2}=\sqrt{(x_1x)^2+(y_1y)^2}\]
You have two points, find the change in x and change in y, and put into the formula.

DustinMHayes
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is 3 8 x1 and y1

PhoenixFire
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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

DustinMHayes
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Is the answer 17

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

DustinMHayes
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My distance formula says you subtract x 2 and x 1

PhoenixFire
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yup.
\[2(3)=2+3=5\]

PhoenixFire
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\[4(8)=4+8=12\]
Double negative becomes a positive.

DustinMHayes
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Ok. Thanks for youre help.