Answer:
20 less than a number is equal to the number.
Step-by-step explanation:
 
        
             
        
        
        
Answer:
10x + 35
Step-by-step explanation:
 
        
             
        
        
        
Answer:
1.4x10^-7 
Step-by-step explanation:
For Problem 6 
First we would divide the first numbers together so 7.84 / 5.6 = 1.4 
We then would add the exponenites together so -3+-4=-7
Leading our awnser to be 1.4x10^-7