Answer:
(a) 11 people
(b) 24 people
Step-by-step explanation:
Part (a)
Let X be the people who are network friends with three other people in the network.
The total pairings = 50
Since
∈
,

Solve for X to find the people who are network friends with three other people,


Answer: There are 11 people who are network friends with three other people in the network.
Part (b)
Total people in the network,

Answer: There are a total of 24 people in the network.
C. point K is (3,-3) and the dilation moves from 3 to 1 so you divide both X and Y coordinates by 3 to get (1,-1)
hope this helps.
The third one.... is obtuse because it is greater than a 90 degree angle , which is a right angle
Question B) you want to take 0.75, divide it to both sides and you get m= 21 0.75m=15.75 m = 21 ___________ = 0.75