Answer:
(6, 9 ) and r = 3
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
Given
x² + y² - 12x - 18y + 108 = 0
Rearrange the x- terms and the y- terms together and subtract 108 from both sides, that is
x² - 12x + y² - 18y = - 108
To obtain standard form use the method of completing the square
add ( half the coefficient of the x and y terms )² to both sides
x² + 2(- 6)x + 36 + y² + 2(- 9)y + 81 = - 108 + 36 + 81
(x - 6)² + (y - 9)² = 9 ← in standard form
with centre = (6, 9 ) and r =
= 3
3-3 x 6+2= -13
The answer= -13
Answer:
$21
Step-by-step explanation:
First, find the price without the discount by adding 12 to 30:
30 + 12
= 42
To find the original cost of each game, divide 42 by 2
42/2
= 21
So, each game was originally $21
Answer:
3 < g ≤ 17
Step-by-step explanation:
The correct answer is:
(x,y) - (x + 4, y - 3)
I hope this has helped you.
Any doubts or questions, please ask in comments and I’ll happily assist you.