Question

If point C is the midpoint of , what is the coordinate of point B? A=(-6, -3) C=(-3, -5)

A.(–3, 1)
B.(–9, 2)
C.(–1, –8)
D.(0, –7) If point C is the midpoint of , what is the coordinate of point B? A=(-6, -3) C=(-3, -5)

A.(–3, 1)
B.(–9, 2)
C.(–1, –8)
D.(0, –7) @Mathematics

Answer 1

if C is midpoint of AB, then its co-ordinates should be the average of A and B co-ordinates
lets call co-ordinates of B (x,y). then we have\[-3=(-6+x)/2\]\[-5=(-3+y)/2\]
this gives us x=0, y=-7.
so answer is D.

Answer 2

oops sorry yes it is the midpoint of AB. it just disappeared. okay thank you so much! :D