A = 4b
b = 7
a = 28
7 * 4 = 28
        
             
        
        
        
The first thing you want to do is isolate the (x)s.
        
                    
             
        
        
        
Answer:

Step-by-step explanation:

 
        
             
        
        
        
A = 2s
c + 2s = 17 .....c + a = 17 (I subbed in "a" for 2s)
2c + a = 24
c + a = 17 .....(-1)
2c + a = 24
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-c -a = -17...result of multiplying by -1
2c + a = 24
---------------add
c = 7
2c + a = 24
2(7) + a = 24
14 + a = 24
a = 24 - 14
a = 10
a = 2s
10 = 2s
10/2 = s
5 = s
so, senior tickets (s) cost $ 5,  adult tickets (a) cost $ 10, and child tickets (c) cost $ 7
1 adult ticket + 1 senior ticket would cost $ 15
        
                    
             
        
        
        
Answer:
When the difference of two numbers is zero, it means that the two numbers are the same. 
Therefore, any irrational number substracted by itself will be equal to zero.
Here some examples:
- √8 - √8 = 0
- √1.6 - √1.6 = 0
- π - π = 0