Answer:
Step-by-step explanation:
Significant Digits or Figures. The significant digits of a number are the digits that have meaning or contribute to the value of the number. Sometimes they are also called significant figures.    
so, all of these digits are significant numbers
 
 
        
             
        
        
        
Answer:
50/6 =8.33
Step-by-step explanation:
 
        
             
        
        
        
Answer:
#19: x=3 
#20: would be n=4 i think
Step-by-step explanation:
#19- there are 4 x's and 12 +1's so 4 into 12 is 3.
#20- well the answer that i got was 5 but 4 was closer to 5 so yea. 
i sure hope this helps!
 
        
             
        
        
        
Answer:
Step-by-step explanation:
Model the expressions
with bar models or algebra tiles to determine if the expressions are
Equivalent.
You can also write equivalent expressions using
properties of operations
and order of operations.
 
        
                    
             
        
        
        
Answer:
   3 . . . goes in both boxes
Step-by-step explanation:
Use the distributive property. Remove the common factor to outside parentheses:
   3(m +n) = a multiple of 3