Answer:
5/the number of socks he has
 
        
             
        
        
        
The second equation, its setup is correct
        
             
        
        
        
Answer:
1. at 1 hour, 3 miles is the distance.
2. at 0 hours, 0 miles is the distance. 
3. at 3 hours, 9 miles is the distance. 
 
        
             
        
        
        
Answer:
The solution is (3,13) and (-1,-3). So none of the mentioned options is correct. 
Step-by-step explanation:
Given that


Now, by susbstituting the value of 'y' from equation i to equation ii, we get






Now by factorization, equation iii can be written as



x = 3 and x = -1
By putting the values of x in equation i, we get
y = 4(3) + 1
y = 12 +1
y = 13
and
y = 4(-1) + 1
y = -4 +1
y = -3 
Therefore, the solution is (3,13) and (-1,-3). So none of the mentioned options is correct.