Answer:
1. they both are the same length and diameter, the difference is thw diameter is a different direction. 
2. 4 cm
3. EB and 8 cm
Step-by-step explanation:
Diameter is the length of the circle aross, hope this helps! 
 
        
             
        
        
        
Question:
3.f(-4)-3.g(-2) please help me with this problem 
Answer: 
-12f + 6g
Step by step explanation:
        
             
        
        
        
Answer:
 −20x − 8
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer: -216
Step-by-step explanation:
 To solve the exercise you must use the formula shown below:
 
 Where:
 
 You should find  
 The formula to find it is:
 
 Where d is the difference between two consecutive terms.
 
 Then:
 
 Substitute it into the first formula. Therefore, you obtain:
 
 
 
        
                    
             
        
        
        
1-8 is simple. Just subtract 8 from 1. so 1-8 = -7