Two ratioa that are equivalent to 9/12 are
3/4 
18/24
        
                    
             
        
        
        
Step-by-step explanation:
The ratio of the two shorter legs of the top triangle is

The bottom triangle has the following ratio:

Since their ratios are the same, this means that the two triangles are similar. 
 
        
             
        
        
        
Finding the mean is you have to add it all up:
49+55+52+46+47+42+38= 328
The divide it by the amount of numbers so, 329/7= 47.
Subtract 47 from every number then, but even if you get a negative number you gotta keep it a positive so just ignore it if you get a negative answer when subtracting, once you do that you would add up those answers you got so;
2+8+5+1+0+5+9= 30
Then divide it again, 30/7
Which then you get the M.A.D which is 4.3, rounded to the nearest ten.
        
             
        
        
        
Answer:
Step-by-step explanation:
 
P(y) = y³ + 2y² + 2y + 1   
P(-1) = (-1)³ + 2*(-1)² + 2*(-1) + 1
       = -1 + 2 - 2 + 1
       = 0 
As, P(-1) = 0, (y + 1) is a factor.
   Use synthetic division or remainder theorem.
 -1        1          2           2           1
        <u>    0        -1            -1         -1        </u>
            1          1            1            0
quotient = y² + y + 1
y³ + 2y² + 2y + 1  = ( y + 1) (y² + y + 1)
  
 
 
        
             
        
        
        
Let us consider the image on the left that is the image in which 1 and 2 , 3 and 4 are connected as image 1 and the other as image 2.
1. All Vertices are connected by the least amount of edges. True
2. Vertex 1 and 2 are not connected. This is false for image
 1 and true for image 2
3.  Vertex 3 and 4 are not connected. This is false for image
 1 and true for image 2
4. You can get to Vertex 1 from Vertex 4 by going through Vertex 3. This is true for image 1