Respuesta :

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The formula of the midpoint between [tex]A(x_A;\ y_A)[/tex] and [tex]B(x_B;\ y_B)[/tex]

[tex]M_{AB}\left(\dfrac{x_A+x_B}{2};\ \dfrac{y_A+y_B}{2}\right)[/tex]

We have [tex]A(1;\ 3);\ B(5;\ 7)[/tex]

Therefore

[tex]M_{AB}\left(\dfrac{1+5}{2};\ \dfrac{3+7}{2}\right)\to M_{AB}\left(\dfrac{6}{2};\ \dfrac{10}{2}\right)\to M_{AB}(3;\ 5)[/tex]

Answer: C. (3; 5)