Answer: 
$6
Step-by-step explanation:
let x and y be the number of chip and pretzel bags respectively  :
4x%2B2y%3 C=20
:
if x=1 then 4%281%29%2B2y%3C=20--->{{2y<=16}}}--->y%3C=8  :
if x=3 then 4%283%29%2B2y%3C=20--->{{2y<=8}}}--->y%3C=4  :
so chips 1 and pretzels 8  :
chips 3 and pretzels 4.
 
        
             
        
        
        
She took 7 boxes of carrots and 9 boxes of potatoes home.
75 boxes of carrots - 68 boxes of carrots = 7 boxes of carrots.
80 boxes of potatoes - 71 boxes of potatoes = 9 boxes of potatoes.
        
                    
             
        
        
        
Area of a circle is = PI x r^2
Area = 27 PI
This means the radius would be the square root of 27:
√27 = 3√3
 The answer is F.