Equation: 7x - 3y = 21
3y = 7x - 21
Divide both sides by 3, 
y = 7/3x - 7
Compare it with principle equation, y = mx + c
Here, slope (m) = 7/3
In short, Your Answer would be: 7/3
Hope this helps!
        
             
        
        
        
Answer:
I think that the answers are B, E, and F.
Step-by-step explanation:
Don't rate me if they are wrong.
 
        
             
        
        
        
Answer:
81 units³
Step-by-step explanation:
V = Length x Widht x Height
= 9 x 3 x 3 
= 81 units³