Answer:
Amount of VAT paid by Jeremy is € 9.31 .
Step-by-step explanation:
As given
In Germany, VAT is at 19% .
Jeremy buys a calculator in Germany for €58.31
This price includes VAT.
Let us assume that the cost of calculator excluding tax is x .
19% is written in the decimal form .

= 0.19 
VAT Price = 0.19 × Cost price of calculator excluding VAT
                  = 0.19 × x 
                  = 0.19x
Than 
Cost of calaculator + VAT price = Cost of calculator including VAT 
x + 0.19 × x = 58.31 
x + 0.19x = 58.31 
1.19x = 58.31 

x = €49  (Approx)
Thus cost price of calculator excluding VAT is €49  .
VAT Price = 0.19 × Cost price of calculator excluding VAT
                 = 0.19 × 49  
                  = € 9.31 
Therefore the amount of VAT paid by Jeremy is € 9.31 .
 
        
             
        
        
        
Answer:
i can't really see
Step-by-step explanation:
 
        
                    
             
        
        
        
Try, please, this:
1) Imagine, that pharmacist used 'x' gr. of 40% solution and 'y' of 70% solution.
Together (20 gr. of 52% sol.) it will be x+y=20.
2) From other side, the pharmacist combined 40x and 70y gramms, after obtaining together it is 52(x+y) gramms. In other words 40x+70y=52(x+y)
3) 

Answer: 8 gr. of 70% solution and 12 gr. of 40%.
 
        
        
        
The total cost would be the number of nights multiplied by the cost per night added to the entry fee.
Total = 7.50n + 6.00