Answer:
A
Step-by-step explanation:
Joint variation is given by: 

Where k is some constant. 
We are given that y = 360 when x = 4 and z = 10. Therefore:

Solving for k: 

Therefore, our equation is: 

Then when x = 5 and z = 12: 

The answer is A. 
 
        
             
        
        
        
Answer:
1
Step-by-step explanation:

 
        
             
        
        
        
Answer:
A-560
B-5600
Step-by-step explanation:
to find the answer for A we need to divide 3360 by 6 which gives us 560.
check: 560 x 6 = 3360
To find the answer for B we need to multiply the answer for A (560) by 10 which gives us 5600
 
        
                    
             
        
        
        
Answer:
5
Step-by-step explanation:
d= √(5-1)^2+(1-4)^2
d= √4^2+(-3)^2
d= √16+9
d=√25
d=5
 
        
             
        
        
        
20 is the slope and 30 is the y-intercept