Answer:
see explanation
Step-by-step explanation:
The equation of a circle in standard form is
(x - h)² + (y - k)² = r² 
where (h, k) are the coordinates of the centre and r is the radius
(x - 6)² + (y + 1)² = 40 ← is the equation of a circle in standard form
centre = (6, - 1) and r =  = 2
 = 2
 
        
             
        
        
        
Answer:
slope  -3
y-intercept  19
Step-by-step explanation:
 
        
             
        
        
        
Calculate the circumference of the full circle:
circumference = PI x diameter = 3.14 x 20 = 62.8 inches
 the arc length is 160 degrees of the full circle
divide 160 by 360 (full circle) and multiply by the circumference:
160/360 x 62.8 = 27.9 inches
        
             
        
        
        
Answer:
   1..25a
Step-by-step explanation:
a + 25%·a = a(1 + 0.25) = 1.25a
_____
<em>Comment on percentages</em>
The symbol "%" is a shorthand way to write "/100", so 25% = 25/100 = 0.25.
Of course, 100/100 = 100% = 1.
Adding 25% of something to 100% of it gives 125% of it, the original amount multiplied by 125/100 = 1.25.
 
        
                    
             
        
        
        
Answer:
Wait are u trying to find the area of a shape???
Step-by-step explanation: