The answer is A because The Commutative Property of Addition states that no matter how the problem is structured you would still get the same answer and answer A expresses that
        
             
        
        
        
Distribute first
a(b+c)=ab+ac
7y(8y-7)=56y^2-49y
now we have
56y^2-49y+46y
56y^2-3y
tada
        
             
        
        
        
Answer:
SAS
Step-by-step explanation:
 
        
             
        
        
        
Answer:
R=9
Step-by-step explanation:
In the equation, replace k with 3. 
R=5(3)-6
Multiply. 
R=15-6
Subtract
R=9
I hope this helps!