"The intersection (∩) of a pair of sets (G and H) is a third set (I) composed by the elements that belong, at the same time, to both given sets."
According to this definition:
Given the sets:
G = {3, 7, 8, 9}
H = {2, 5, 7, 8}
The Intersection is:
G ∩ H = I = {7, 8}
:-)
 
        
                    
             
        
        
        
X+x+54=180
2x+54=180
2x=126
x=63
63+54=117
one angle is 63, the other is 117
        
             
        
        
        
0.4kg  per week.     so 0.4kg  x  6 weeks is 2.4kgs
        
             
        
        
        
√(1/121) = √1 / √121 = 1 / 11 = <em>11⁻¹</em>
        
                    
             
        
        
        
All I can help with is that the very bottom left angle is 60 degrees