Answer: The net change would be -2.
Step-by-step explanation: The upward change of elevator is represented by positive sign while the downward change represented by negative sign.
Given, First the elevator goes up 15 floors, change = + 15, Then it goes 9 floors down, change = -9, Then it goes 11 floors up,Change = + 11, Finally, it goes 19 floor down, Change = - 19 So, the net change = sum of total changes = 15 - 9 + 11 - 19 = -2 
your welcome!
 
        
             
        
        
        
Answer:
ask google she tell you the right answer 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
14.0328
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
13.9 sorry if I'm wrong just trying to help.
Step-by-step explanation:
first plug in your numbers
a*2+ b*2= c*2
12*12= 144
7*7=49
144+49= 193 
square root of 193: 13.89244399 
rounded to nearest tenth is 13.9
 
        
             
        
        
        
Answer:
6,5
Step-by-step explanation:
-2 is 4 down from 2, so reflected should be 4 up, or 6