Answer= 7 
Explanation: combine all like numbers 
5-b+4-2=0
5-2+4=7 
7-b=0 
Then you can tell the answer is 7 because that is the only thing that can replace b and equal 0
        
             
        
        
        
Answer:
1
Step-by-step explanation:
 
        
                    
             
        
        
        
Step-by-step explanation:
We have,
Diameter of cylinder, d = 39.2 mm
Radius, r = 19.6 cm
Height of the cylinder, h = 39.2 mm
It is required to find the surface area of this cylinder. The formula of the surface area of cylinder is given by :

Putting all values we get :

 
        
             
        
        
        
Answer:
565.49 or if rounded to the nearest tenth, 565.5
Explanation:
The formula for finding the volume of a cone is V=1/3Bh
B = pi times the radius squared
h = height
Substitute 6 for r and 15 for h.
V= 1/3· ·(
·( )·15
)·15
Multiply.
V= 565.49 or 565.5 rounded to the nearest tenth.
 
        
             
        
        
        
Answer:
K'(-3,-2) and A'(-2,5)
Step-by-step explanation:
180 degree rotation = (x,y)---(-x, -y)
hence, if k=(3,2)
then k' = (-3, -2)
90 degree rotation clockwise= (x,y)--(y,-x)
hence if, A=(-5 , -2)
then, A'= (-2, 5)