anonymous
  • anonymous
Radius OA of circle O has a slope of 2.5. What is the slope of the line tangent to circle O at point A? 0.8 2.5 -0.4 -5
Mathematics
chestercat
  • chestercat
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amoodarya
  • amoodarya
|dw:14351729953:dw
amoodarya
  • amoodarya
|dw:1435173081679:dw| \[\frac{HA}{oH}=2.5\] is this ? what you mean ?
anonymous
  • anonymous
um i guess...it's cause the problem doesn't include a picture

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amoodarya
  • amoodarya
|dw:1435173229389:dw|
amoodarya
  • amoodarya
you can draw an image (it help you to better understanding) slope (oA) , slope(tangent line) =-1 because they are perpendicular
amoodarya
  • amoodarya
now you must guess the answer ! can't you ?
anonymous
  • anonymous
i dont know! i honestly dont know /:
amoodarya
  • amoodarya
if two line are perpendicular ...with slope \[m_1 ,m_2\] so relation between them is : \[m_1.m_2=-1\\m_1=2.5\\so\\m_2=?\]
amoodarya
  • amoodarya
m2 =?
anonymous
  • anonymous
-3.5? idk!
amoodarya
  • amoodarya
\[2.5 *m_2=-1\\m_2=\frac{-1}{2.5}=\frac{-1}{\frac{5}{2}}\\=\frac{-2}{5}\]
anonymous
  • anonymous
-0.4
amoodarya
  • amoodarya
bravo
anonymous
  • anonymous
yaaay! thank you!
amoodarya
  • amoodarya
understand ?
anonymous
  • anonymous
yes (:
amoodarya
  • amoodarya
it is not better to change your Id to igetmath ?
anonymous
  • anonymous
you dont like my id name? lol
amoodarya
  • amoodarya
i live mathematics

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