21
is what I got on my calculator
        
                    
             
        
        
        
Answer:
Estimation is a mental process of coming up with an answer that is relatively  close, to allow decisions to be made. The types of estimation are quantity, computation and measurement. 
An estimation strategy is simply coming up with a good estimate based on evidence and already known facts. Coming to a conclusion as close to the real answer as you can. It can also be called an educated guess.
 
        
             
        
        
        
Answer:
   4x^2 -5x -2
Step-by-step explanation:
= 5x^2 -3x -7 -x^2 -2x +5
= (5 -1)x^2 +(-3 -2)x +(-7 +5)
= 4x^2 -5x -2
 
        
             
        
        
        
Your answer would be 15 m if i’m doing it right
        
             
        
        
        
Y=70x
If she types at a consistent speed for 49 minutes she will have typed 3,430 words.