Using the formula a(b+c) = ab + ac, then 7(2x-6) = 14x - 42. The answer is D.
        
             
        
        
        
5/3=1.6666 hope this helpssssssssssssssssssss
        
                    
             
        
        
        
the measure is 140, I basically summed all of the angles of a polygon of “n”, which is 7, then I did 7-2 times 180 (900) so I can finally add up all of your measurements 
 
        
             
        
        
        
Answer:
Step-by-step explanation:
4). Given sequence → 3, 5, 7, 9, 11........
     Common difference of an arithmetic sequence is defined by,
     Common difference = Successive term - previous term
                                        = 2nd term - 1st term
                                        = 5 - 3 
                                        = 2
5). Given sequence → 16, 19, 22, 25........
     Common difference of an arithmetic sequence = Second term - first term 
                                                                                     = 19 - 16
                                                                                      = 3