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SSSSS [86.1K]
3 years ago
14

Point M is the midpoint of AB. The coordinates of point A are (-8, 3) and the coordinates of M are (-2, 1). What are the coordin

ates of point B?
Mathematics
2 answers:
Gelneren [198K]3 years ago
6 0
\bf \textit{middle point of 2 points }\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%  (a,b)
A&({{ -8}}\quad ,&{{ 3}})\quad 
%  (c,d)
B&({{ x}}\quad ,&{{ y}})
\end{array}\qquad
%   coordinates of midpoint 
\left(\cfrac{{{ x_2}} + {{ x_1}}}{2}\quad ,\quad \cfrac{{{ y_2}} + {{ y_1}}}{2} \right)
\\\\\\
\left( \cfrac{x-8}{2}~,~\cfrac{y+3}{2} \right)=\stackrel{M}{(-2,1)}\implies 
\begin{cases}
\cfrac{x-8}{2}=-2\\\\
x-8=-4\\
x=4\\
------\\
\cfrac{y+3}{2}=1\\\\
y+3=2\\
y=-1
\end{cases}
aivan3 [116]3 years ago
6 0
B= (4,-1)
I hope this was helpful!
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