If you would like to solve the equation k / 2 + 9 = 30, you can calculate this using the following steps:
k / 2 + 9 = 30
k / 2 = 30 - 9 
k / 2 = 21     /*2
k = 21 * 2
k = 42
The result is 42.
        
                    
             
        
        
        
Answer:
was this the whole question cause it depends on what the plane is 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
25.12
Step-by-step explanation:
The formula of the circumference of a circle is: C = 2(pi)(r)
Plug in 3.14 for pi and 4 for the radius.
C = 2(3.14)(4)
Multiply. 
C = 25.12 
 
        
             
        
        
        
Answer:
The approximate solution to the system is (1.2, 4.4)
x = 1.2 and y = 4.4
Step-by-step explanation:
The solution of the system of linear equations equation y = –0.25x + 4.7 and y = 4.9x – 1.64 is shown in the attached graph. The red line represents the equation y = –0.25x + 4.7 and the blue line represents the equation  = 4.9x – 1.64. 
The solution of the system of equations is their point of intersection shown on the graph. 
The point of intersection is (1.231, 4.392). To the nearest tenth, it is (1.2, 4,4). So x = 1.2 and y = 4.4. 
So the approximate solution to the system is (1.2, 4.4)
 
        
                    
             
        
        
        
Answer:
52
Step-by-step explanation: