Kevin would be 14 and Benjamin would be 10
        
             
        
        
        
The formula subject to q is 
Explanation:
The given formula is 
We need to determine the formula subject to q.
<u>The formula subject to q:</u>
The formula subject to q can be determined by solving the formula for q.
Let us solve the formula.
Thus, we have;

Subtracting both sides by 5p, we have;

Dividing both sides by 5, we get;

Thus, the formula subject to q is 
 
        
             
        
        
        
The first one is 10ab + 20
        
                    
             
        
        
        
Answer:
The answer is 39 ...........