Multiply and simplify. (x - 3)(x2 + 3x + 9) A) x3 - 27 B) x3 - 27x2 C) x3 - 6x2 + 3x - 27 D) x3 - 9x2 + 6x - 27
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The equation of circle with the center at (h,k) is:
r stands for radius. Therefore r^2 = diameter or 2×radius.
The question has already given the information we need, which are:
- radius = 4
- the center at (0,8)
Since the center is (h,k) - therefore the center is at h = 0 and k = 8 making it (h,k) = (0,8).
Substitute the values in the equation:
Simplify to the simplest form
Answer
- The equation of a circle is x^2+(y-8)^2 = 16
The equation of a circle is represented as :
where,
- "h" represents x - coordinate of the center of circle
- "k" represents y - coordinate of the center of circle
- " r " represents Radius of the given circle
So, from above equation we get:
Therefore, Radius of the given circle measures 6 units.