Answer:
the fastest is 12 meters every 4 seconds
slowest is 8 meters every 6 seconds 
Step-by-step explanation:
 
        
                    
             
        
        
        
Let the reduced price be x
If he paid for 6 rounds, he paid 1 round at full price of $19 and 5 rounds at reduced price:
19 + 5x = 59
5x = 59 - 19
5x = 40
x = 40 ÷ 5 
x = 8
The reduced price is at $8 per round.
        
             
        
        
        
Answer:
$0.03
Step-by-step explanation:
2.31/11 =.21
2.70/15 =.18
.21-.18 = .03
 
        
             
        
        
        
Answer:
<h2>Q = -6</h2>
Step-by-step explanation:
If the solution of the system of equations is {(x, y): x - y = 4} - infinitely many solutions, then this system is consistent and dependent.
x - 3y = 4            <em>multiply both sides by 2</em>
2x - 6y = 8
Therefore Q = -6
 
        
             
        
        
        
The radius of the lens is 1 yard