Answer:
- 439
Step-by-step explanation:
- s ( x ) = 2 - x² 
- t ( x ) = 3x
- s ( t ( -7 ) ) = ?
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- t (-7) = 3 * ( -7 ) = -21
- s ( t ( -7 ) ) = s ( -21 ) = 2 - ( -21 )² = 2 - 441 = - 439
- s ( t ( -7 ) ) = -439
 
        
             
        
        
        
Answer:
Number of comic books is 75.
Original price of each comic book is 4$.
Step-by-step explanation:
 
        
             
        
        
        
Answer:
it is an example of an expression
Step-by-step explanation:
it is an example of an expression because it is asking a question without an equal sign. so its not a question, but an expression
 
        
             
        
        
        
Since the square has 4 sides, you only have to add 

 four times.
The <span>perimeter of the square is: </span><span>

 cm </span>