1. 90 
2. 900
3. 9000
are your answer
        
                    
             
        
        
        
Answer:
C
Step-by-step explanation:
please mark brainliest
 
        
             
        
        
        
Answer:
68
Step-by-step explanation:
You multipliy 7x4 and you get 28 now you add the 40+28=68.
 
        
             
        
        
        
X+y=10, x=10-y
4(10-y)+6y=332
solve the next parts yourself 
Substitution is to use one variable to express another variable in order to eliminate one variable in the original equation
        
             
        
        
        
Answer:
9-4/5 
5/5 = 1
Step-by-step explanation: