An easy way is to do it, if you get confused by multiplying fractions, is by turning the fractions into decimals. Since you are trying to find N you want to multiply the 1/5 by the 1/3.
1/5 = 0.2
1/3 = 0.33333333333333333333333333333333 
 if you multiply those you get 0.06666666666666666666666666666667 which when put into a fraction it equals 1/15 
but if you don't want to do that just try to remember that you want to get by itself. and when multiplying fractions in this situation the bottom numbers only matter.. so 5 x 3 = 15  1/15
would you like me to put it in a document to show you? 
        
             
        
        
        
Let William be x years old.
Thomas = (4 + x) years
In five years,
William = (x + 5) years
Thomas = 4 + x + 5 = (9 + x) years
Given, in five years sum of their ages is 24.
x + 5 + 9 + x = 24
2x + 14 = 24
2x = 24 - 14 
2x = 10
x = 

x = 5
Hence, William is 5 years old and Thomas is 9 years old.
 
        
        
        
Answer:
14 = x
Step-by-step explanation:
-2 on both sides you get 7 = x/2, multiply both sides by 2 and you get 14 = x
 
        
                    
             
        
        
        
Answer:
Graph B represents a function.
Step-by-step explanation:
Graph B is a quadratic function. y = x^2