Answer:
Dilations which reduce or enlarge an object. Translations which move the object from one part on the graph to another. I have also learned about how to construct a perpendicular bisector. 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
b
Step-by-step explanation:
The equation of a circle centred at the origin is
x² + y² = r² ← r is the radius
The circle shown is centred at the origin and has a radius of 5, thus
x² + y² = 5² ⇒ x² + y² = 25 → b
 
        
             
        
        
        
If (-5) = x then the anwser should be 
-234
 
        
        
        
1. 40 units___16 workers
 20 units___x= 8 workers
(20*16)/40=8
2. 40 units___16 workers
 25 units___x= 10 workers
(25*16)/40=10
3. 40 units___16 workers
 100 units___x= 40 workers
(100*16)/40=40
 
        
                    
             
        
        
        
Answer:
7z^3+6z^2-27z+22
Step-by-step explanation:
The given question is of subtraction:
So,
(7z^3+42z^2-15z+1)- (36z^2+12z-21)
=7z^3+42z^2-15z+1-36z^2-12z+21
Combining alike terms to simplify
=7z^3+42z^2-36z^2-15z-12z+1+21
=7z^3+6z^2-27z+22
So the answer in simplified form is:
7z^3+6z^2-27z+22 ..