To solve this you want to plug in your x's and y's to see if they match.
A. 3(11)-4=33-4=29 and 29 is not equal to 5 so A is not a solution
B.3(5)-4=15-4=11=11  3(3)-4=9-4=5 and 5 is not equal to 2 so B is not a solution
C. 3(2)-4= 6-4=2 2 is not equal to 3 so C is not a solution 
D is the answer. 3(5)-4=11 and 3(2)-4= 2
 
        
             
        
        
        
Answer:
7/12
Step-by-step explanation:
3*4=12. 4/12+3/12=7/12.
 
        
                    
             
        
        
        
Answer:
You kayak 255 feet farther 5 minutes on the way down the river than in 5 minutes on the way up the river
Step-by-step explanation:
Given:
The rate at which you kayak up a river =  48 feet every 30 seconds.
The rate at which you kayak down a river = 423 feet every 3 minutes
To Find:
How much farther do you kayak in 5 minutes on the way down the river than in 5 minutes on the way up the river = ?
Solution:
Let the speed with which you kayak up the river be x and the speed with which you kayak down the river be y
Then  
x = [ Converting 30 seconds to 0.5 minutes]
     [ Converting 30 seconds to 0.5 minutes]
x =  96 feet per minute 
Similarly 
y =
y = 141 feet per minute
Now the distance kayaked  up the river in 5 minutes
=>
=> ( in 5 minutes there are 10  30 minutes)
 ( in 5 minutes there are 10  30 minutes)
=>960 feet
Now the distance kayaked down the river in 5 minutes
=>
=> ( in 5 minutes there are 10  30 minutes)
 ( in 5 minutes there are 10  30 minutes)
=>705 feet
Thus 
960-705 =  255 feet
 
        
             
        
        
        
Number 6 is A because Five times -1 is -5+3×11 equal -2