I think it’s C but I am not sure sorry dude
 
        
             
        
        
        
Answer:
3
Step-by-step explanation:
6=24-6a
6a=24-6
6a^6=18^6
a=3
 
        
                    
             
        
        
        
Answer: yards and meters
Step-by-step explanation:
 
        
             
        
        
        
39×2÷6=13
13-5=8 mm. The other base of the trapezoid is 8 mm. Let check it:
1/2(8+5)×6
=1/2×13×6
=39 square mm. Hope it help!
        
             
        
        
        
Step-by-step explanation:
12/3.48= cost of 1 book 
cost of 20 books = 12/3.48×20 =68.95