The formula for the circumference is C=2piR (r is radius)
If the flagpole is in the center and it's 15 feet to the edge, that means that 15 feet is the radius. Draw it out, you'll see. Now you plug 15 into the formula, either use a calculator or don't, and solve. You will get 
94.2 as your circumference.
        
                    
             
        
        
        
Replace x with -2 in the equation and solve.
3(-2) +1 = -6 + 1  = -5
 
        
                    
             
        
        
        
Answer:
The answer is C the cylinder is not a polyhedron
 
        
             
        
        
        
Answer:
2 3/4 Gallons 
Step-by-step explanation:
4 1/2-1 3/4= 2 3/4
Convert 4 1/2 to 4 2/4 then subtract and you will get 2 3/4
 
        
             
        
        
        
If you are saying (-7/4)*(-8/9) Then it is 
1.55555555556
If you are saying something else please message me so I can help better.