Answer:

Step-by-step explanation:
we know that
The formula to calculate the midpoint between two complex numbers (a+bi) and (c+di) points is equal to

we have
(1+9i) and (5-3i)
substitute the given values


Answer:
APBCD
Step-by-step explanation:
Because this make sance
Answer:
72 inches
Step-by-step explanation:
The perimeter is the sum of the outside "fence"
The side on the left that is not marked is 19-11 = 8
And the side on the top that is not marked is 17-10 = 7
Summing up the sides starting at 19 and going clockwise
19+17+11+7+8+10 =
72 inches