Answer:
Correct answer is:
The transformation was a 180° rotation about the origin.
Step-by-step explanation:
Given the triangle RST formed by points:

is transformed using (x, y) → (–x, –y) such that coordinates of triangle R'S'T' :

Please refer to the attached image for the given dimensions and coordinates.
It is clearly visible that:
The given triangle RST has coordinates in first quadrant.
and the resulting coordinates R'S'T' are in third quadrant.
The rotation of angle from 1st quadrant to 2nd quadrant is  and
 and
The rotation of angle from 2nd quadrant to 3rd quadrant is  .
.
<em></em> <em> total rotation is </em>
<em> total rotation is </em> .
.
 
        
             
        
        
        
Answer:
The value is  
 
Step-by-step explanation:
From the question we are told that 
       
And that 
      
So the number of sand grain that is in  is mathematically evaluated as
 is mathematically evaluated as 
        
 
 =>   
 
 
        
             
        
        
        
Answer:
0.7.
Step-by-step explanation:
x^2 = 0.7x
x^2 - 0.7x = 0
x(x - 0.7) = 0
x = 0, 0.7.
 
        
             
        
        
        
They are corresponding angles.
 
        
             
        
        
        
<span>3x=7y+16 
15y=7y + 16
15y - 7y = 16
8y = 16
y = 8/16
y = 2
hope this helps you !!!    =')</span>