Answer:
the number of weeks is unknown the A represents the number of weeks so the answer is 100a
 
        
             
        
        
        
It would be 31+t. 
Unless there's more to this question. 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
the quotient means divide
7/y
the first number is the numerator and the second number is the denominator
 
        
             
        
        
        
Answer:
6 hours 
Step-by-step explanation:
Given that:
Time taken by Sam = 3 hours
Sam's rate = 1/3
Time taken : Sam + Laura = 2 hours
Sam's rate + Laura's rate = 1/2
Let time taken by Laura = x
1/3 + 1/x = 1/2
1/x = 1/2 - 1/3
1/x = (3 - 2) / 6
1/x = 1 /6
x = 6
Hencw, it will take 6 hours for Laura alone to rake leaves