Question

For 15, the answer is b correct?

Answer 1

Answer:

a. C = (0,0), r = 3

Step-by-step explanation:

No, the 9 is squared. The square root of 9 is ±3. Therefore, the only possible answer is a.

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Answer 2

Answer:

a C= (0, 0), r = 3

Step-by-step explanation:

For 15th question: a Is the correct answer

${x}^{2} + {y}^{2} = 9 \\ {(x - 0)}^{2} + {(y - 0)}^{2} = {3}^{2} \\ equating \: it \: with \\ {(x - h)}^{2} + {(y - k)}^{2} = {r}^{2} \\h = 0 \\ k = 0 \\c = (h, \: \: k) \\ c= (0, \: \: 0) \\ {r}^{2} = {3}^{2} \\ r = 3$