Simple actually. The 1000 is the starting price the -20 is the losing of value per week and the w stands for the number of weeks.
        
             
        
        
        
Answer: A. 4
Im in high school this is simple math so. Your welcome
        
                    
             
        
        
        
Answer:
The room is square. This is because it says "diagonal of the floor..." Which means it is from one corner of the room to the opposite end.
Step-by-step explanation:
It says "four wall room" which means it is a square. It also states that each wall meet at a right angle. To through you off this question stated the word 'diagonal' to mess with you when reading this question quickly. If you look more detailed and I like to re-read sentences in order to recognize all the information given. So the Room IS a Square.
 
        
             
        
        
        
Step-by-step explanation:

First, let's distribute the  variable to each term in the first parenthesis:
 variable to each term in the first parenthesis:

Next, let's distribute the  variable to each term in the second parenthesis:
 variable to each term in the second parenthesis:

Next, let's group like terms together:

Finally, let's add or subtract like terms to get the result:
