Answer:
6
Step-by-step explanation:
1+3=4  4-2=2  2+4=6
 
        
                    
             
        
        
        
Step-by-step explanation:
The sum of an arithmetic series is found by multiplying the number of terms times the average of the first and last terms. Example: 3 + 7 + 11 + 15 + ··· + 99 has a1 = 3 and d = 4.
 
        
                    
             
        
        
        
Gradient =2 because the slope is 2 units. Y-intercept = -2 because it crosses the y-line at -2.
        
             
        
        
        
Answer:
t=6
Step-by-step explanation: