The formula for this is A= a + b/2 x h.
        
             
        
        
        
 The answer is <span>f(x), g(x), h(x) 
(well, that's my opinion) 
 :) I hope this helped u  :)</span>
        
             
        
        
        
Three added to the product of four and twelve
or
The product of four and twelve added by three
        
                    
             
        
        
        
Answer:
y=5x−z
Step-by-step explanation:
Step 1: Multiply both sides by y.
xy−5=yz
Step 2: Add -yz to both sides.
xy−5+−yz=yz+−yz
xy−yz−5=0
Step 3: Add 5 to both sides.
xy−yz−5+5=0+5
xy−yz=5
Step 4: Factor out variable y.
y(x−z)=5
Step 5: Divide both sides by x-z.
y(x−z)x−z=5x−z
y=5x−z