Hello : 
13π/4  = (16-3)π/4
            = 16π/4 -3π/4
  13π/4  = -3π/4 +4π   
 tan( 13π/4) = tan ( -3π/4)= -  tan ( 3π/4)  =- tan( π - π/4) = - tan(- π/4)
tan( 13π/4) = -(-tan(π/4)) =tan(π/4)=1
        
                    
             
        
        
        
Answer:
240
Step-by-step explanation:
12 times 2 is 24
24 times 10 is 240
Have a nice day
 
        
                    
             
        
        
        
(6) typing for 20 characters dah dah dah
        
                    
             
        
        
        
Answer:
k = -14
Step-by-step explanation:
We should cross-multiply
9/(k -  7)  =  6 / k
9*k  = 6 * (k - 7)
9k = 6k  - 42
9k - 6k = -42
3k = -42
k = -14
 
        
             
        
        
        
So think about it this way, Which line is most associated with the dots?