Answer:Umm you can do ratios if you learned it or you can times it 
Step-by-step explanation:
Hope this helps 
 
        
             
        
        
        
7d+12-14d-3
Combine like terms
-7d+9
Hope this helped. 
        
             
        
        
        
Answer:
-64
Step-by-step explanation:
5(x – 6) + 3x – 2
Distribute
5x - 30 +3x -2
Combine like terms
8x -32
Let x = -4
8*-4 -32
-32 -32
-64
 
        
             
        
        
        
Answer:
see explanation
Step-by-step explanation:
The volume (V) of a cylinder is
V = area of base × height
here area of base = 64π and height = 10, hence
V = 64π × 10 = 640π in³ ← exact value