Answer:
13.5m
Step-by-step explanation:
The boy is 1.5m tall so you subtract that by 15m and you get 13.5m
 
        
             
        
        
        
Answer:
The third and the forth
Step-by-step explanation:
Functions do not have repetition in the x column. 
Since the other options have doubles of an x value 
(or, to phrase it differently, two y values for one x value) 
they are not functions.
 
        
             
        
        
        
Answer:
Step-by-step explanation:
(3c/4)/(3h/8)
(3c/4)(8/3h)
(24/12)c/h
2 c/h
So employee can make 2 chairs in one hour.
 
        
             
        
        
        
6x – 4y = 9
4y = 6x - 9
 y = 6/4 x - 9/4
 y = 3/2 x - 9/4 this line has slope = 3/2
perpendicular line, slope is opposite and reciprocal so slope of this line = -2/3
answer:
A.	y= - 2/3 x - 4 (only this line has slope = -2/3)
 
        
             
        
        
        
415 thousandths is written out 0.415