Answer: 27
Explanation:
P = 2(l+w) = 2 · (9 + 4.5) = 27
        
             
        
        
        
Answer:
Metronome 
Step-by-step explanation:
Metronome gives a steady beat to people that cant count beats in a measure
 
        
             
        
        
        
 Answer:
ok thanks for ur care my friend have a wonderful day
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
21 roses are white so that is 70% 
so that would be 70/100 and can reduce to 7/10
and the percent of red would be 3/10 
so we can do 21 divided by 7 which equals 3
then we can do 3 x 3 because 3/10 which equals 9
then you do 21 + 9= 30
 so the answer is 30.