The system of inequalities is x+y≥250 and 3x+2y≤800.
Step-by-step explanation:
Given, 
People to invite = at least 250 
At least 250 means that the number can increase from 250.
Cups to be provided = only 800 
It means the number cannot exceed 800.
Number of adults = A
Number of children = C
According to given statement; 
x+y≥250
3x+2y≤800
The system of inequalities is x+y≥250 and 3x+2y≤800.
Keywords: linear inequalities, addition
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F(x)= -8x²
f(-3)= -8* (-3)²
f(-3)= -8 * 9
f(-3)= -72
        
                    
             
        
        
        
This graph is a Quadratic Graph meaning it is a "U" shape. I am unable to help with the transformations since I am unaware of the signs in the problem. But I hope I helped
        
             
        
        
        
4 x 94 = 376
 376 - 85 = 291
 291 / 3 = 97