A grid shows the positions of a subway stop and your house. The subway stop is located at (–6, 1), and your house is located at (–2, –8). What is the distance, to the nearest unit, between your house and the subway stop?
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OpenStudy (johnweldon1993):
You could always use the distance formula
\[d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}\]
you have your 2 points
(-6,1) (-2,-8)
(x1,y1)(x2,y2)
plug those in and you'll find your distance
OpenStudy (anonymous):
@FutureMathProfessor Can you help me?
OpenStudy (jim766):
\[\sqrt{(-6--2)^2+(1--8)^2}\] now simplify each parenthese
then square each
then add them together
then take the square root
OpenStudy (jim766):
what is -6 - (-2) ?
OpenStudy (anonymous):
Use the pythagorean theorem. 4^2 + 9^2 = what^2
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OpenStudy (anonymous):
@Jim766 It's -4
OpenStudy (anonymous):
-4 times -4 = 16
OpenStudy (jim766):
what is 1 - (-8) =
OpenStudy (anonymous):
9
OpenStudy (anonymous):
9*9=81
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OpenStudy (jim766):
so now we have
\[\sqrt{16 + 81}\] add them together
OpenStudy (anonymous):
Ohh, okay! 97 squared is 9.8
OpenStudy (jim766):
\[\sqrt{97} \approx 9.85\]
OpenStudy (jim766):
right,
OpenStudy (jim766):
you just plug it in and then do what it says
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