Answer:
z-score = 2.
Step-by-step explanation:
The z-score = (x - m) / d   where x =the person's score, m = the  mean and d = the standard deviation.
So we have (87-67)/10
= 2.
 
        
             
        
        
        
18 - 7x = -20.52.5 = 7xx = 5/14 (c)
        
                    
             
        
        
        
Answer/Step-by-step explanation:
A. 
Using b = 2

Using b = 4

Using b = 6

Using b = 8

Using b = 10

Using b = 2

B. 
Using x = 3

Using x = 5

Using x = 7

Using x = 9

Using x = 11

Using x = 13

C. 
Using a = 2

Using a = 3

Using a = 4

Using a = 5

Using a = 6

Using a = 7

D. 
Using y = 2

Using y = 3

Using y = 5

Using y = 10

Using y = 8

Using y = 6

 
        
             
        
        
        
Answer:
slope perpendicular= -1
Step-by-step explanation:
3x-3y=-63
-3y=-3x-63           divide both sides by -3
y=1x+21
Perpendicular lines have slopes that are the opposite of the reciprocal of each other
 
        
             
        
        
        
Answer:
There's no Image. I guess you forgot to send.