Answer:
Its the 3 one
Step-by-step explanation:
 
        
             
        
        
        
Answer:
2) reflexive property
3) given
4) substitution postulate
5) substitution postulate
6) addition postulate
7) partition postulate
8) equal length line segments are congruent
9) SSS theorem
Step-by-step explanation:
 
        
             
        
        
        
For this case we have the following functions:

By definition of composition of functions we have:

Then substituting:

So:

Answer:

 
        
             
        
        
        
Answer:
1.Graphing the linear equations by constructing the table of values. 
2.Graphing the linear equation using the slope and y-intercept (i.e. y=mx+b)
3.Graphing the linear equation by connecting x-intercept and y-intercept.
Step-by-step explanation:
