The summation of negative 5 n minus 1, from n equals 3 to 12 can be
expressed as
n = 3/12
substitute the value of n to the equatio
-5n – 1
-5( 3/12 ) -1
-9/4
 
        
             
        
        
        
18
Because 6•3= 18
Hope this helped
        
                    
             
        
        
        
B because if you take it it would be b
        
             
        
        
        
Answer:
1, 5 and 6.
Step-by-step explanation:
The sides of this triangles has lengths in the ratio x : √3x : 2x where 2x is the hypotenuse.
When C = 30,  the side AB is the small leg  (=x).
When B = 90, the hypotenuse is  AC ( =2x).
When A =  60, the larger leg is BC (=√3x).
1.  AB = 4, BC = 4√3 :- Are possible legs.
5 AB = 7, AC = 14. :-  AB = small leg, AC = hypotenuse.
6. AB = 11, BC = 11√3:-   AB = small, BC = larger leg.
 
        
             
        
        
        
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