Answer:
50 - 15m 
Step-by-step explanation:
You start out with 50 dollars so that is the constant. 
Each DVD is 15 dollars, so for every dvd(m) it is 15 dollars.
 
        
             
        
        
        
Step-by-step explanation:
personal- 347 ÷ 809 = 0.43%
lap top- 398 ÷ 809 = 0.49%
printer- 64 ÷ 809 = 0.08%
 
        
             
        
        
        
1000
Step-by-step explanation:
Let the share of votes obtained by the parties A, B and C be x, 2x and 4x respectively. 
According to the given information:
No of votes obtained by C = 1500 + No of votes obtained by A

 
        
             
        
        
        
Answer:
2 answers available depending on paranthesis
Step-by-step explanation:
5√2-4√2/√2 = 5√2 - 4
if there is a parenthesis like 
(5√2 - 4√2)/√2 = 1√2/√2 =1