2 answers:
            
              
              
                
                
Answer:
20?
Step-by-step explanation:
i think im not sure try it if im wrong 1 star me if im write 5 star me
 
                                
             
                    
              
              
                
                
Let’s define our variables: x represents child passes and y represents adult passes. 
Now, let’s make some equations with the provided information. 
First, let’s deal with the money 
12x+15y=4140
Next, the amount of passes
x+y=300
Then, take the second equation, and subtract y over. 
x=300-y
Now, we can substitute the equation above in for x in the first equation 
12x+15y=4140
12(300-y) +15y =4140
Distribute the 12
3600-12y+15y=4140
Combine like terms, then subtract 3600 over 
3y=540
Divide by 3 on both sides
y=180
So, 180 $15 entry passes were sold
                                
             
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Answer:
75 is the length of the third side
 
        
                    
             
        
        
        
120/210 = 0.57
0.57 x 60 = 34.2
34 hours and 12 minutes
        
             
        
        
        
Answer:
Step-by-step explanation:
We're gonna need a graph to do this one. 
 
        
             
        
        
        
Answer:
-7x²=185-10
-7x²=175
x²=-25
x=±√-25
 
        
             
        
        
        
I say 12 because that would mean the first rectangle is 6x12 and the second is 10x12