ANSWER : 
The center-radius form of the circle equation is in the format (x – h)2 + (y – k)2 = r2, with the center being at the point (h, k) and the radius being "r". This form of the equation is helpful, since you can easily find the center and the radius.
 
        
             
        
        
        
Use the formula  ( )^2
)^2  
in order to create a new term to complete the square.
(x−5)2−25
 
        
             
        
        
        
Sale Price = $157.5 (answer). This means the cost of the item to you is $157.5. You will pay $157.5 for a item with original price of $175 when discounted 10%. In this example, if you buy an item at $175 with 10% discount, you will pay 175 - 17.5 = 157.50 dollars.
Hope this helps!
 
        
             
        
        
        
Answer:
Third one
Step-by-step explanation:
multiple each numbers by 1/2