Answer:
78 or -82
Step-by-step explanation:
-2+80=78
-2-80=-82
 
        
             
        
        
        
Answer:
The vertex represent the minimum amount of profit
Step-by-step explanation:
Plot the function to better understand the problem
Let
x ----> the number of users in thousands
y ---> the Monthly profit in thousands
using a graphing tool
see the attached figure
we have a vertical parabola open upward
The vertex represent a minimum
In the context of this problem
The vertex represent the minimum amount of profit
In this problem the vertex is the point (0.4,-4)
0.4 represent -----> 0.4(1,000)=400 users
-4=-4(1,000)=-$4,000 (profit negative)
 
        
             
        
        
        
Answer:
That would be about 11.667
 
        
             
        
        
        
Am not quite sure but it’s 17 
Hope this helped
        
                    
             
        
        
        
In y = mx + b form, which is what ur equation is in, the y int can be found in the b position
y = mx + b
y = x + 6
as u can see, the number in the b position, ur y int, is 6 <==