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:

or

Step-by-step explanation:
The expression  can be simplified by first writing the fraction under one single radical instead of two.
 can be simplified by first writing the fraction under one single radical instead of two.

5/15 simplifies because both share the same factor 5.
It becomes 
This can simplify further by breaking apart the radical.

A radical cannot be left in the denominator, so rationalize it by multiplying by √3 to numerator and denominator.

 
        
             
        
        
        
Answer:
x= 1 program
x= $2
Step-by-step explanation:
40-30= 10 <- what she spent
10/5 = 2 
5 = Amount of Programs
Each program is $2.
Your welcome :)
 
        
             
        
        
        
Answer:
12.5
Step-by-step explanation:
All I really did was divide the circumference by pi to get the diameter which you end up dividing it by two to get the radius.