Answer:
f=ab/a+b
Step-by-step explanation:
Let's solve for f.
1/f=1/a+1/b
 
        
             
        
        
        
Answer:
Look below.
Step-by-step explanation:
$2.50*-$2.00=10.50
This isn't right so I don't know what you're asking for...
 
        
                    
             
        
        
        
Answer:
heart
Step-by-step explanation:
 
        
                    
             
        
        
        
Step-by-step explanation:
f(x) = |x-7| + 3
when x is equal to 4, then
f(4) = |4-7| + 3
 =-3+3
 =0