Pre-Calc Circles

• (x+1)² + (y +1)² = 3
• (x+1)² + (y -1)² = 3
• (x+1)² + (y +1)² = 9
• (x-1)² + (y -1)² = 9

Write the equation of a circle with center (7, 0) with radius 3. 

• (x - 7)² + y² = 9
• x² + (y -7)² = 9
• (x - 7)² + y² = 3
• x² + (y -7)² = 3

Change the following equation to standard form
x²+y²-4x+12y-8=0

• (x+2)²+(y-6)²=48
• (x-2)²+(y+6)²=48
• (x-6)²+(y-2)²=48
• (x+2)²+(y-6)²=48

What is the coordinates of the centre and the radius of the circle with equation:
(x - 5)² + (y + 3)² = 36 ?

• Centre (5,-3)
  Radius = 6 units
• Centre (-5,3)
  Radius = 6 units
• Centre (-5,3)
  Radius = 36 units
• Centre (5,-3)
  Radius = 36 units

What is the equation for the circle with center (-1,-4) and tangent to the line y = 1. 

• (x+1)² + (y+4)² = 25
• (x+1)² + (y-4)² = 4
• (x-1)² + (y-4)² = 25
• (x+1)² + (y+4)² = 5