<span>We want to check how many intersections line A and B have, that is, we want to check how many common solutions do these equations have:
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i) 2x + 2y = 8
ii) x + y = 4
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use equation ii) to write y in terms of x as : y=4-x, 
substitute y =4-x in equation i):
</span>2x + 2y = 8
2x + 2(4-x) = 8
<span>2x+8-2x=8
8=8
this is always true, which means the equations have infinitely many common solutions.
Answer: </span><span>There are infinitely many solutions.</span><span>
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3x9=27
21/3 = 7
so 
7+27x9+5
27x9=243
243+7+5
answer is 255
        
                    
             
        
        
        
So find how much was eaten
1/6 and 2/3=eaten
add 1/6 and 2/3
convert bottom number to same
2/3=4/6
1/6+4/6=5/6
5/6 eaten
3-5/6=
2+1-5/6=
2+6/6-5/6=
2+1/6
2 and 1/6 waffles left
        
                    
             
        
        
        
81 , 243 , 729 the pattern is mutiply each by three
        
                    
             
        
        
        
 negative 3...............................