The original area of a face would be a^2. Now that you added b to the edge, the new area of each face would be (a+b)^2. To find how much the are increased, subtract a^2 from (a+b)^2.  So the answer is b(2a+b)
 So the answer is b(2a+b)
 
        
                    
             
        
        
        
Answer:51 minutes 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
B. -40°F
Step-by-step explanation:
its- clearly lower than -30
 
        
                    
             
        
        
        
 Answer:
Step-by-step explanation:
<u>Sides are:</u>
<u>There are following number of posts on each of the sides:</u>
- 20 ft side ⇒ 20/5 = 4
- 25 ft side ⇒ 25/5 = 5
- 35 ft side ⇒ 35/5 = 7
<u>Total number:</u>