Answer:
the answer is   B  2:7
Step-by-step explanation:
 
        
             
        
        
        
-8 is your answer :).....................
        
                    
             
        
        
        
The equation of the line best fit is y=35, x= 20
no practice, student expcted to type 20 wpm
every minute spent practicing typing speed increased by 1/2  word per minute
        
                    
             
        
        
        
Answer:
(3x-17)°+(x+40)°+(2x-5)°=180°[sum of angle of triangle]
6x°+18°=180°
6x°=180°-18°
x°=162°÷6°
x°=27°
Again,
=3x-17. 2x-5. x+40°
=3×27-17. =2×27-5. =27+40
=64°. =49°. =67°
 
        
             
        
        
        
-35 is the answer hope this helps