3. Find the midpoint of the line segment with the given endplints .
a) A[7.4) and B(9.-1)
b) A(8-9) and B(0,5)
c) A(1.-7) and B(1,-12)
d) A(0,4) and B(-4,-12)

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58

answer:

c) the x-coordinate of the center of the circle increases by 3

hm let me think hm think think hm think yes