Mathematics
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OpenStudy (anonymous):
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 (hartnn):
Distance between points (x1,y1) and (x2,y2) is
\(\huge d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}\)
hartnn (hartnn):
can you find 'd' now ?
OpenStudy (anonymous):
yes. thanks.
hartnn (hartnn):
welcome ^_^
if you want to verify your answer, post it...i'll verify for u.
OpenStudy (anonymous):
okay.
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OpenStudy (anonymous):
i got \[\sqrt{-23}\]
hartnn (hartnn):
how ?
that isn't correct..
OpenStudy (anonymous):
IM SO CONFUSED.
hartnn (hartnn):
ok, so we have
\(\huge d=\sqrt{(12-18)^2+(4-(-1))^2}\)
right?
lets go step by step
what is 12-18 =.... ?
OpenStudy (anonymous):
-6
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hartnn (hartnn):
correct, and \((-6)^2 =\)
OpenStudy (anonymous):
-32
OpenStudy (anonymous):
NO 32.
hartnn (hartnn):
? how ?
6*6 =.... ?
its not 32
OpenStudy (anonymous):
I MEANT 36
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hartnn (hartnn):
then you are correct!
OpenStudy (anonymous):
sorry
hartnn (hartnn):
now
whats 4-(-1) =.. ?
OpenStudy (anonymous):
5
hartnn (hartnn):
good! and 5^2 =.. ?
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OpenStudy (anonymous):
25.
OpenStudy (anonymous):
OKAY I SEE WHERE I MESSED UP!!
hartnn (hartnn):
so you have \(\sqrt {36+25}=..?\)
hartnn (hartnn):
good :)
so tell me now what u get...
OpenStudy (anonymous):
7.8
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hartnn (hartnn):
\(\checkmark \)
OpenStudy (anonymous):
:D THANKS!!
OpenStudy (anonymous):
could you help me with one more?
hartnn (hartnn):
sure! post it.