Answer:   (C) 13,120
<u>Step-by-step explanation:</u>
Given the sequence {4, 12, 36, 108, ... , 8748} we know that the first term (a) is 4 and the ratio (r) is 
Input the values above into the Sum formula:

 
        
             
        
        
        
Answer:
 its -2x
Step-by-step explanation:
 
        
                    
             
        
        
        
6x+33-2(3x+1)
17+14
30+1
60-29
18+13
        
             
        
        
        
Answer:
20
20, 30, 40, 50
I think this might be the answer
 
        
             
        
        
        
Since the trapezoid can be inscribed in a circle, that means angle B + angle D = 180 degree. Since AB is parallel to CD, then angle B + angle C = 180 degree. Therefore, angle D = angle C.