Solution :
Given :
X = the number of boys in a family of four children
Families having four children are chosen randomly.
The gender distribution in the four child family are equally probable.
Thus,
X P(X) CDF
0
= 1/16 
1
= 1/4
2
= 3/8 
3
= 1/4 
4
= 1/16 1
The expression representing the distance is
0
The length of the leg is 5
There are no like terms in 9u^2v because it is all one term and none of the variables are like one another.

k and m must satisfy 8k = 1 mean k = ⅛
and 2km+⅝=0 mean m = -5/2