Identify the center and radius of each circle.
1 answer:
Answer:
1. Centre = (1,-3); r = 2;
2. Centre = (2,-1); r = 4
Step-by-step explanation:
1. (x - 1)² + (y + 3)² = 4
The centre-radius equation for a circle is
(x - h)² + (y - k)² = r²
The centre of the circle is at (h, k) and the radius is r.
By comparing terms in the two equations we see that
h = 1, k = -3, r = 2
Centre = (1,-3); r = 2
2. (x - 2)² + (y + 1)² = 16
Here,
h = 2, k = -1, r = 4
Centre = (2,-1); r = 4
The figure below shows the first circle in red and the second in green.
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Answer:
is the fraction of people wearing with black shoes.
Step-by-step explanation:
Given:
If there's 15 players total, 1/3 are wearing red shoes, 2/5 are wearing blue shoes and everyone else is wearing black shoes.
Now, to find the fraction of people with black shoes.
Total players = 15.
Fraction of people wearing red shoes =
So, number of people are wearing red shoes:
Fraction of people wearing blue shoes =
Thus, number of people wearing blue shoes:
And rest are wearing black shoes.
Now, to get the number of people wearing black shoes by subtracting number of people are wearing red shoes and blue shoes from the total number of players:
Thus, the fraction of people wearing black shoes:
=
Therefore, is the fraction of people wearing with black shoes.