Answer:
D
Step-by-step explanation:
1, 17, and 20 are very different from the average numbers in this list.
 
        
                    
             
        
        
        
$16.75
because $134 divided by 8 hours = $16.75 per hour
        
                    
             
        
        
        
Answer:
20% discount
Step-by-step explanation:
300 - 240 = 60
60 / 300 = 0.20
0.20 × 100 = 20
 
        
             
        
        
        
Answer:
12.5%
Step-by-step explanation:
$4.50-$4/$4 x 100%
0.5/4x100%
50/4= 25/2 = 12.5%
 
        
             
        
        
        
Answer:
D
Step-by-step explanation:
The equations are
● 4x + 2y = 10 (1)
● 4x - 2y = -10 (2)
● 4x + 2y = 10 
Add - 4x to both sides 
● 4x + 2y -4x = 10 -4x 
● 2y = 10 -4x 
Divide both sides by 2 
● 2y/2 = (10 - 4x)/2 
● y = 5 - 2x 
● y = -2x + 5 (1) 
● 4x - 2y = -10
Add -4x to both sides 
● 4x -2y -4x = -10 - 4x
● -2y = -10 - 4x 
Divide both sides by -2 
● -2y/-2 = (-10 -4x)/-2
● y = 10 + 2x 
● y = 2x + 5 (2) 
So the equation are 
● y = 2x + 5 
● y = -2x + 5 
Graph them 
The lines intersect at (0,5) but aren't perpendicular
So the answer is d