Respuesta :
Greetings from Brasil...
The expression that allows calculating the midpoint is:
M = [(X₁ + X₂)/2 ; (Y₁ + Y₂)/2]
X₁ = - 6
X₂ = - 6
Y₁ = 5
Y₂ = 8
then
M = [(- 6 + (- 6))/2 ; (5 + 8)/2]
M = [(- 12)/2 ; 13/2]
M = (- 6; 13/2)

Answer:
(−6,6 1/2)
Step-by-step explanation:
Calculate the midpoint, using the midpoint formula:
In decimal form, it would be (-6,6.5).
