Answer:
62 x 10 =620
Step-by-step explanation:
multiply
 
        
             
        
        
        
Answer:
r = 1
Step-by-step explanation:
we know that :

Then

Then

Then
5×12 = 4×(16-r)
Then
60 = 64 - 4r
Then
4r = 64 - 60
Then
4r = 4
Then
r = 1
 
        
             
        
        
        
Answer:
5
Step-by-step explanation:
5+2 = 7
7x4 = 28