Answer:
D. 
Step-by-step explanation:
Area of rectangle = 
Length of rectangle = (x - 8)
Width = (x + 11)
Area of rectangle = 
Expand the expression 
 (distributive property of multiplication)
 (distributive property of multiplication)

Combine like terms

Expression for the area of the rectangle = 
 
        
             
        
        
        
Answer:

Step-by-step explanation:
First, expand the original equation:
(x + 1)(2x + 3) 

Now simplify:

And that's your answer!
 
        
             
        
        
        
Well you find how much the error was and divide it by the amount he predicted.
30/230= 0.13 0.13=13%
        
                    
             
        
        
        
Answer:
1. y = -0.6x + 5.4.
2. The entered points belong to a vertical line. There is no slope.
Equation: x = 6
3.  y = 0.16667x + 5.5.
4. The entered points belong to a vertical line. There is no slope.
Equation: x = -8.
Step-by-step explanation:
 
        
             
        
        
        
The constant of proportionality is 600