Answer:
n=32/5
Step-by-step explanation:
 
        
             
        
        
        
5 multiplied by .3 is 1.5
1.5 + 18.5 = 20.
y = 9.25
        
             
        
        
        
Answer:
A
Step-by-step explanation:
5/5=1 so if there are two sets it equals 2 
 
        
                    
             
        
        
        
Answer:
7
Step-by-step explanation:
7 x 4 = 28 - 5 = 23
7 + 16 = 23
 
        
             
        
        
        
Step-by-step explanation: To find the exponent, we look at the expression again and see how much of the same number or fraction is repeated. Since the main number is 1/9 and there are 3 fractions repeating it, the exponent is 
 or 1/9 to the 3rd power.
<em>Down is a formula I made!</em>
Main number: 1/9
Repeating how many times: 3
Expression: 
Therefore, 1/9 to the 3rd power is 1/729.

<em>Note: The questioner did not ask for the answer. I wanted to add it anyway for future reasons.</em>