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Mathematics 8 Online
OpenStudy (anonymous):

Please answer this question ! ! ! !

OpenStudy (anonymous):

If point C is the midpoint of (look at the drawing), what is the coordinate of point B?

OpenStudy (anonymous):

|dw:1319315972712:dw|

OpenStudy (anonymous):

OpenStudy (anonymous):

C can't be the midpoint of side AB since it is not on segment AB; B(5,1). Are you sure that you attached the correct drawing?

OpenStudy (anonymous):

(–3, 3) (–2, 1) (–4, 4) (–4, 1)

OpenStudy (anonymous):

sorry

OpenStudy (anonymous):

?????

OpenStudy (anonymous):

since\[y _{c}=\frac{y_{B}-y_{A}}{2}\]\[y _{B}=2y _{C}-y _{A}=2(4)-5=3\]similarly for the x-coordinate of B\[x _{B}=2x _{C}-x _{A}=2(1)-5=-3\]So point B(-3,3)

OpenStudy (anonymous):

thank you

OpenStudy (anonymous):

ur welcome :})

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