Expand and simplify (x + 5)(x + 4)
2 answers:
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Answer:
Step-by-step explanation:
The equation of a circle:
(h, k) - center
r - radius
We have the center (4, -3) and the point on the circle (9, -3).
The length of radius is equal to the distance between a center and an any point on a circle.
The formula of a distance between two points:
Susbtitute:
The center (3, 7) → h = 3, k = 7.
Finally we have: