Answer:
Try using an interest calculator 
Step-by-step explanation:
It's a life saver! 
 
        
             
        
        
        
Hello
x -  7 
for  x =  23   = 23 - 7 = 16 
3 a - b =  12 - 6 = 6 
8/t  =  8/4 =  2 
9 + m =  9 + 1.5 = 10.5
1/2 w + 2 =  1/2 x 1/9 + 2 = 1/18 + 2 = 1/18 + 36/18 = 37/18
5 ( 6.2 + z ) =   50 
 
        
             
        
        
        
Answer:
<h3> (x-8)²+(y-3)² = 81</h3>
Step-by-step explanation:
The general equation of a circle is expressed as;
(x-a)²+(y-b)² = r² where;
(a, b) is the centre of the circle
r is the radius
Given the centre (8, 3) and the radius of 9, the equation of the circle will be;
(x-a)²+(y-b)² = r² 
(x-8)²+(y-3)² = 9²
 (x-8)²+(y-3)² = 81
hence the required equation is  (x-8)²+(y-3)² = 81