Answer: The process of combining matrices, vectors, or other quantities under specific rules to obtain their product.
        
             
        
        
        
Answer:
It is 12.9, 13.1, 13.2 C.
Step-by-step explanation:
 
        
             
        
        
        

First, simplify 

 to 

 / Your problem should look like: 
 Second,
Second, multiply both sides by 36. / Your problem should look like: 
 Third,
Third, multiply both sides by -1. / Your problem should look like: 
 Fourth,
Fourth, switch your sides. / Your problem should look like: 

Answer: 
C) 21
 
        
             
        
        
        
Answer:
5 Hours 
Step-by-step explanation:
He’s going 63 MPH 
441/7 = 63 MPH 
315/63 = 5 Hours 
 
        
                    
             
        
        
        
1) 
x+10<-7
bring 10 to the other side
x<-10-7
x<-17
2)
-3x-4>5
bring -4 to the other side
-3x>9
divide -3 at the other side, since it is negative it changes to less than
x<-3