HI I JUST DID THE FIRST ONE . SORRY I CAN'T ANSWER THE 5TH AND6th IT'S HARD
 
        
             
        
        
        
I think it’s -0.75. The x coordinate represents the term number so y would show the pattern which is -3.75, -4.5, -5.25, -6, -6.75, -7.5, -8.25, -9. To get to the next number, each term is being decreased by 0.75. Hope this helps :)
        
                    
             
        
        
        
 = 2a - 1
2(
) = 2(2a - 1) <em>multiplied both sides by 2 </em>
ab = 4a - 2 <em>distributed the 2 on the right side</em>
ab - 4a = -2 <em>subtracted 4a from both sides</em>
a(b - 4) = -2 factored out "a" from the left side
a = 
 <em>divided (b - 4) on both sides</em>
Answer: a = 
 
 
        
             
        
        
        
<h3>Solution:</h3>

<h3>Answer:</h3>

<h3>Hope it helps...</h3>
ray4918 here to help