Respuesta :

(6.5, –15.25) Is the answer.

Answer:

The coordinates of R are (6.5,-15.25).

Step-by-step explanation:

We are given that

The midpoint of RT is S.

The coordinates of S are  (0.5,-6.25).

The coordinates of point T  are (-5.5,2.75).

We have to find the coordinates of R.

Mid- point formula :

[tex]x=\frac{x_1+x_2}{2}, y=\frac{y_1+y_2}{2}[/tex]

We have [tex]x=0.5,y=-6.25,x_2=-5.5,y_2=2.75[/tex]

Let the coordinates of R are  ([tex]x_1,y_1[/tex]).

Using this formula ,

[tex]0.5=\frac{x_1-5.5}{2}\implies x_1-5.5=1.0[/tex]

[tex]x_1=1.0+5.5=6.5[/tex]

[tex]-6.25=\frac{y_1+2.75}{2}[/tex]

[tex]-12.50=y_1+2.75[/tex]

[tex]y_1=-12.50-2.75=-15.25[/tex]

Hence, the coordinates of R are (6.5,-15.25).