Answer:
(a) The unit circle is centered at (0,0) with a radius of 1.
(b) The equation of a circle of radius <em>r</em>, with a center located at (0,0): 
<em>x</em>²<em>+ y</em>² <em>= r</em>².
(c) (i) P(1,0)
     (ii) P(0,1)
     (iii) P(-1,0)
     (iv) P(0,-1)
Step-by-step explanation: 
 
        
                    
             
        
        
        
Answer:
x = -1 or x = -7
Step-by-step explanation:
y = (x + 4)^2 - 9
To find x-intercept, set y = 0
=>  (x + 4)^2 - 9 = 0
=>  ( x + 1)( x + 7) = 0
=> x = -1 or x = -7
 
        
                    
             
        
        
        
Start by isolating one of the variables 
x=-4y+2
Sub x into the other formula and solve for the y value of the solution. 
3(-4y+2)+2y=11
-12y+6+2y=11
-12y+2y=11-6
-10y=5
y=-1/2
Sub the y value into the x formula you created. 
x=-4(-1/2)+2
x=2+2
x=4
Therefore the solution is (4,-1/2) I think the answer is B unless the y value is actually -12.
Hope this helps :)
        
             
        
        
        
Answer:

Step-by-step explanation: