Answer:
Ray.
Step-by-step explanation:
Lines have no endpoints, while rays have 1 endpoint (:
 
        
             
        
        
        
Answer:
Infinity minus 9 is infinity-9
Step-by-step explanation:
 
        
             
        
        
        
Answer:
122.7792 sq. m
Step-by-step explanation:
 diameter= 8.4 m
therefore, radius = r = 4.2 m.......( as radius is 1/2 of diameter) 
height = h= 12 m
only the exterior is to painted so the total surface area of the cylinder is taken, 
total surface area of cylinder = 2π r( h+r)
 =2* 3.14* 4.2*(12+4.2)
=122.7792 sq. m
 
        
             
        
        
        
First do 
3x + -5x = -2x
Then do
-2x + 5x = 3x
Lastly do
3x+1