Answer:
I believe they sold 150 adult tickets 80 student tickets, and 48 children tickets 
Step-by-step explanation:
 
        
             
        
        
        
40 hundreds flats. 400 tens = 4,000. 40 hundreds also equals 4,000.
        
                    
             
        
        
        
Answer:
15°
Step-by-step explanation:
The line in the middle of the triangle divides it into two triangles.  These two triangles are equal.  You can see this because the given angle (90°) is equal for both sides, and the bottom sides (23) are also equal to each other.  
Since the triangles are equal, this means that the given angle of 75° also applies to the other side.  The total degrees a triangle can have is 180°.  Use the given angles to solve for the unknown angle.
75° + 90° + x = 180°
165° + x = 180°
x = 15°
The angle measure will be 15°.
 
        
             
        
        
        
Answer:
Diego: y = 11 + 5 x
Emilia: y = 60 - 2 x
Step-by-step explanation:
y for saving and x for weeks
Diego: y = 11 + 5 x
Emilia: y = 60 - 2 x