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Help 9,10

 Mar 21, 2018
 #1
avatar+638 
+1

A and B

 Mar 21, 2018
 #2
avatar+100456 
+1

The equation is

 

( x - h)^2  + (y - k)^2  = r^2

 

Where  (h, k)  is the center and r is the radius

 

So  we have

 

(x - (-7) )^2  +  ( y  -  (-6) ) ^2  =  2^2

 

(x + 7)^2  + ( y + 6)^2  = 4 

 

 

10)   3 left, 4 up

 

The first equation  can be written as

 

(x - 0)^2  + (y - 0)^2  =  49     ⇒   center  =  (0, 0)

 

Moving to the left 3, we add 3 to the x coordinate of the center

Moving up 4, we subtract 4 from the y coordinate of the center 

 

( x - 0  + 3 )^2   + ( y - 0 - 4)^2  =  49

 

(x + 3)^2  + (y - 4)^2  = 49

 

 

cool cool cool

 Mar 21, 2018

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