KiArUnsYu
What is the distance between points (12, 4) and (18, –1)? Round to the nearest tenth.
7.8
6.1
4.7
9.9



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hartnn
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Distance between points (x1,y1) and (x2,y2) is
\(\huge d=\sqrt{(x_1x_2)^2+(y_1y_2)^2}\)

hartnn
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can you find 'd' now ?

KiArUnsYu
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yes. thanks.

hartnn
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welcome ^_^
if you want to verify your answer, post it...i'll verify for u.

KiArUnsYu
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okay.

KiArUnsYu
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i got \[\sqrt{23}\]

hartnn
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how ?
that isn't correct..

KiArUnsYu
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IM SO CONFUSED.

hartnn
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ok, so we have
\(\huge d=\sqrt{(1218)^2+(4(1))^2}\)
right?
lets go step by step
what is 1218 =.... ?

KiArUnsYu
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6

hartnn
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correct, and \((6)^2 =\)

KiArUnsYu
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32

KiArUnsYu
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NO 32.

hartnn
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? how ?
6*6 =.... ?
its not 32

KiArUnsYu
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I MEANT 36

hartnn
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then you are correct!

KiArUnsYu
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sorry

hartnn
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now
whats 4(1) =.. ?

KiArUnsYu
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5

hartnn
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good! and 5^2 =.. ?

KiArUnsYu
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25.

KiArUnsYu
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OKAY I SEE WHERE I MESSED UP!!

hartnn
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so you have \(\sqrt {36+25}=..?\)

hartnn
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good :)
so tell me now what u get...

KiArUnsYu
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7.8

hartnn
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\(\checkmark \)

KiArUnsYu
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:D THANKS!!

KiArUnsYu
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could you help me with one more?

hartnn
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sure! post it.