The midpoint of XY is M(0, 4). One endpoint is X(6, –2). Find the coordinate of the other endpoint Y. A.(–6, 10) B.(3, 1) C.(–6, 6) D.(12, 0)

Respuesta :

Answer:

The answer is A.

Step-by-step explanation:

Given that the formula for midpoint is :

[tex]m = ( \frac{x1 + x2}{2} , \frac{y1 + y2}{2} )[/tex]

So you have to subtitute the coordinates into the formula :

[tex]let \: m = (0,4) \\ let \: (x1,y1) = (6, - 2)[/tex]

[tex](0,4) = ( \frac{6 + x2}{2} , \frac{ - 2 + y2}{2} )[/tex]

Next, you have to solve it by comparison :

[tex]x⇒ \\ \frac{6 + x}{2} = 0 \\ 6 + x = 0 \\ x = - 6[/tex]

[tex]y⇒ \\ \frac{ - 2 + y}{2} = 4 \\ - 2 + y = 8 \\ y = 10[/tex]