its 14n+21. 7×2n is 14n, and 3×7 is 21
 
        
                    
             
        
        
        
Answer:
1. y = x + 3
2. y =  x -6
x -6
3. y = x - 1
4. y = -2x -2
5. y = 2x - 1
6. y =  x - 4
x - 4
7. y = -x
8. y =  x + 1
x + 1
Step-by-step explanation:
I'm sorry I couldn't finish it all! I hope this helps. I've been summoned to dinner...
 
        
             
        
        
        
V = 1/2bhl
V / 1/2hl = 1/2bhl / 1/2hl
b = 1/2hlV
 
        
             
        
        
        
I hope this helps you 
31,9÷4
319/40
7,975