The are of the specific figure you have gave me is 57 I think I’m not really sure
        
             
        
        
        
Answer:  i. Cost of adult ticket = $ 30 
ii.  Cost of child ticket = $20
Step-by-step explanation:
Define variables:
 Let x= cost of 1 adult tickets , y= cost of 1 child tickets.
Form linear equations:
5x+3y = 210      (i)
2x+5y= 160  (ii)
Multiply (i) by 2 and (ii) by 5
10x +6y = 420       (iii)
10x+25y = 800        (iv)
Eliminate (iii) from (iv)
19y = 380
⇒ y= 20
Put this in (i)

Hence, Cost of adult ticket = $ 30 and Cost of child ticket = $20
 
        
             
        
        
        
Answer:
9x + 5y
Step-by-step explanation:
Here, in 2x + 5y+ 7x,   the 'like terms' are 2x and 7x, and the sum of these terms is 9x.  Thus, 2x + 5y+ 7x becomes 9x + 5y.