Answer:
B. 4
Step-by-step explanation:
The given function is of the form:

A is called the amplitude of the given function.
We can read from the graph that, the function ranges between:
-4 and 4
This implies that:

Therefore the amplitude of the function is 4.
Hence the value of A must be 4.
 
        
             
        
        
        
Answer:
it look like its 4 and the 4 over 4/5 I think
 
        
                    
             
        
        
        
Step-by-step explanation:
the linear inequality is how to measure value of a line through quality and quantity.
 
        
             
        
        
        
We have y=2x and y=x+2
They both equal y, so substitute the first equation for y in the second equation.
2x=x+2
Let’s get x to one side. Let’s subtract x from both sides.
X=2
Since x=2, just plug in 2 for x.
2+2=4
So,
X=2
Y=4
        
             
        
        
        
Answer:
   33 1/3%
Step-by-step explanation:
When you buy 20 ads, the per-ad rate is 
   $1200/20 = $60 . . . per ad
When you buy 80 ads, the per-ad rate is 
   $3200/80 = $40 . . . per ad
The percentage change to the $60 price is ...
   ((new price) - (original price))/(original price) × 100%
   = ($40 -$60)/$60 × 100% = -20/60 × 100%
   = -1/3 × 100% = -33 1/3%
The higher volume purchase comes with a 33 1/3% discount.