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Mathematics 21 Online
OpenStudy (anonymous):

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

OpenStudy (saifoo.khan):

7.8`

OpenStudy (chriss):

\[d=\sqrt{_{(x _{2}-x _{1})^{2}+(y _{2}-y _{1})^{2}}}\] \[d=\sqrt{(18-12)^{2}+(-1-4)^{2}}\] \[d=\sqrt{36+25}=\sqrt{61}\] \[d \approx7.8\]

OpenStudy (anonymous):

omg thank you soooo verry much for the help (:

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