since brians shadow is 2/3rds his height
4 / 6 is 2 /3
20 / 30 is 2 / 3 too so flag pole must be 30 feet tall
 
        
             
        
        
        
Answer:
C = 50 + 30d
Step-by-step explanation:
For one day,
50 + 30
For two days
50 + 2(30)
For d days,
50 + d(30)
C = 50 + 30d
 
        
             
        
        
        
When you distribute you should get

Simplify to get

Answer 2 is correct
 
        
        
        
Answer:
(a) 
Step-by-step explanation:
The question is incomplete. (See comment for complete question).
From the completed question, we have:

 --- number of pyramids
 --- number of pyramids
Required
An expression for the area of the base
The total base length of the pyramid represents the perimeter of the base.
And since the base is a square, then the following relationship exist.

Where L represents the length of each side.
This gives

Make L the subject

The area of the base is then calculated as:


 
        
                    
             
        
        
        
Given:
The values of input and outputs are given
Output is increasing by 9 for the increase in x values.

