Answer:

Step-by-step explanation:
<h3>Arithmetic sequence:</h3>
       
6th term is 14 ⇒ 
                 a + (6 - 1)d = 14
                     a  +  5d = 14  --------------(I)
14th term is 6 ⇒
              a + (14-1)d = 6
                   a + 13d = 6 ----------------(II)
Subtract equation (II) from equation(I)
         (I)          a + 5d = 14
         (II)         a + 13d = 6
                     <u>-    -          -</u>
                             -8d = 8
                                d  = 8 ÷(-8)       
                               
Plugin d = -1 in equation (I)
 a + 5(-1) = 14
       a -5  = 14
              a = 14 + 5
               
   
20th term: 
  
        = 19 - 19
    
 
        
                    
             
        
        
        
Step-by-step explanation:

Where Z is set of integer. 
 
        
                    
             
        
        
        
Answer:
12
Step-by-step explanation:
 
        
             
        
        
        
<span>The first quartile is the same as the median of the data which are less than the overall median. Same as the 25th percentile.
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I hope my answer has come to your help. God bless and have a nice day ahead!
        
             
        
        
        
Answer:
Step-by-step explanation:
y = -5/4x + 5