Answer: R = (16, 4)
Step-by-step explanation:
M = (12, 6,5)
R = ???
S = (8, 9)
[tex]M_x=\dfrac{R_x+S_x}{2}\qquad \qquad M_y=\dfrac{R_y+S_y}{2}\\\\12=\dfrac{R_x+8}{2}\qquad \qquad \quad 6.5=\dfrac{R_y+9}{2}\\\\24=R_x+8\qquad \qquad \quad 13=R_y+9\\\\16=R_x\qquad \qquad \qquad \quad 4=R_y\\\\.\qquad \qquad \large\boxed{R=(16,4)}[/tex]
