Answer:
The coefficient is 
Step-by-step explanation:
The given sum is 

We can choose to add only the coeffients of  or simplify the whole sum.
 or simplify the whole sum.

We collect the LCM for the  terms;
 terms;

This will give us;

Which is the same as

The coefficient is 
 
        
                    
             
        
        
        
Answer:
28m
Step-by-step explanation:
2x+x=42
3x=42
x=14
However, since the length of the rectangle is twice the width, we'll need to multiply it by 2. 
So: 14 times 2=28
 
        
             
        
        
        
For 

, 

, all the more 

, therefore no solution.
For 

, we have 

. Obviously that' false.
For 

 both 

 and 

, where 

, belong to the range 

, then 

 belong to the range 

.
Those ranges don't have a common part, therefore, again, no solution.
So, the equation 

 doesn't have a solution.
 
        
        
        
The answer c, because they got 9 out of 15 flips being heads. This probability is 0.6. The other answers are not accurate.