Answer:
the first one
the third one
and the forth one
Step-by-step explanation:
they all add up to the same amount
Answer:
the value of x is (-2) and y is (-5)
Answer:
(-2, 4.5)
Step-by-step explanation:
The midpoint formula is 
(-5+1/2, 3+6/2)
(-4/2, 9/2)
Your answer will be (-2, 4.5)