Answer:
C 
Step-by-step explanation:
When we write an equation, we look for something like is or equals 
A.twice as much as a number   2x
B.12 less than a number      x-12
C.half of a number is 15   1/2x =15
D.the difference of 20 and a number?  20-x
A,B, and D are expressions 
 
        
                    
             
        
        
        
The correct answer would be A. Hope this helps
        
             
        
        
        
Answer:
Step-by-step explanation:
wha-
 
        
                    
             
        
        
        
Answer:
   $8.00
Step-by-step explanation:
The problem statement gives two relations between the prices of two kinds of tickets. These can be used to write a system of equations for the ticket prices.
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<h3>setup</h3>
Let 'a' and 'c' represent the prices of adult and children's tickets, respectively. The given relations can be expressed as ...
   a - c = 1.50 . . . . . . . adult tickets are $1.50 more
   175a +325c = 3512.5 . . . . . total revenue from ticket sales.
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<h3>solution</h3>
We are only interested in the price of an adult ticket, so we can eliminate c to give one equation we can solve for 'a'. Using the first equation, an expression for c is ...
   c = a -1.50
Substituting that into the second equation, we have ...
   175a +325(a -1.50) = 3512.50
   500a -487.50 = 3512.50 . . . . . . simplify
   500a = 4000 . . . . . . add 487.50
   a = 8 . . . . . . . . . divide by 500
An adult ticket costs $8.