5n+9=2n
5n+9−2n=2n−2n
3n+9=0
3n+9−9=0−9
3n=−9
3n/3=−9/3
n=−3
        
             
        
        
        
Answer:
810
Step-by-step explanation:
3 x 3 x 9 x 10 = 810 [times means multiply]
 
        
                    
             
        
        
        
A.
estimate: 8/5
quotient:1.6
b.
estimate: 7
quotient: 7
c.
estimate: 15/2
quotient:7.5
        
                    
             
        
        
        
5x0.02=10 hope this helps! :)