Answer: 5
This is because (4r + 6) means you take r and multiply that number by 4. 
Because there is no number, r would equal one in this case. 
4 • 1 is 4 
4 + 6 is 10
This would give us 1/2(10)
Half of 10 is 5. 
Therefore, the answer is 5.
        
             
        
        
        
Answer:

Step-by-step explanation:
Using the Foil method 
you multiply x times x and get  
 
Then you multiply -4 times X and get -4x
Then you multiply -3 times X and get -3x 
then you add -4 and -3 together and get -7x
Lastly you multiply -4 and -3 and get 12 
And there you have it

 
        
             
        
        
        
Answer:
12 km
Step-by-step explanation:
C is 5 km 
4+3+5=12
pls brainliest
 
        
                    
             
        
        
        
I think the answer is 0.04...