Answer:
 29 units
Step-by-step explanation:
The length of a segment of a number line is the difference of the coordinates of the end points:
 45 -16 = 29
 
        
             
        
        
        
Setup
remember is means =, and of means *
Writing across the words
15 = x * 39
15/39 = x
x =0.3846 = 38.46% 
        
                    
             
        
        
        
Length = 2W
P= 2L + 2W
60 = 2(2W) + 2W
60= 4W +2W
60 = 6W
60/6W = 6W/6W
w = 10
Length = 2(10)
Length = 20
P= 2L + 2W
60= 2(20) + 2(10)
60= 40 +20
60 = 60
        
             
        
        
        
Answer:
x=-2
Step-by-step explanation: