Mathematics
26.09.2022 19:27
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PLEASE HELP HURRY !! Help?

PLEASE HELP HURRY !! Help?
PLEASE HELP HURRY !! Help?
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sandstorm163
sandstorm163
4,5(44 marks)

I think that it could be D but tell me if I'm wrong

benwill0702
benwill0702
5,0(60 marks)
\bf ~~~~~~~~~~~~\textit{middle point of 2 points }
\\\\
J(\stackrel{x_1}{4}~,~\stackrel{y_1}{-15})\qquad 
K(\stackrel{x_2}{x}~,~\stackrel{y_2}{y})
\qquad
%   coordinates of midpoint 
\left(\cfrac{ x_2 +  x_1}{2}~~~ ,~~~ \cfrac{ y_2 +  y_1}{2} \right)
\\\\\\
\left( \cfrac{x+4}{2}~~,~~\cfrac{y-15}{2} \right)\implies \stackrel{midpoint}{L(-1,8)}\implies 
\begin{cases}
\cfrac{x+4}{2}=-1\\\\
x+4=-2\\
\boxed{x=-6}\\
------\\
\cfrac{y-15}{2}=8\\\\
y-15=16\\
\boxed{y=21}
\end{cases}

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