Answer:
<u>Equation of a circle:</u>
- (x - h)² + (y - k)² = r², where (h, k) is the center and r- radius
<u>Substitute the given values to get the equation of this circle:</u>
- (x - (-5))² + (y - (-9))² = 7² ⇒
- (x + 5)² + (y + 9)² = 49
Answer:
![a=12](https://tex.z-dn.net/?f=a%3D12)
Step-by-step explanation:
Pythagorean Theorem: ![a^{2}+b^{2}=c^{2}](https://tex.z-dn.net/?f=a%5E%7B2%7D%2Bb%5E%7B2%7D%3Dc%5E%7B2%7D)
In this case, a = 9, b = a, and c = 15.
![9^{2}+a^{2}=15^{2}](https://tex.z-dn.net/?f=9%5E%7B2%7D%2Ba%5E%7B2%7D%3D15%5E%7B2%7D)
![81+a^{2}=225](https://tex.z-dn.net/?f=81%2Ba%5E%7B2%7D%3D225)
The, we subtract 81 from both sides getting:
,
Then, ![a=12](https://tex.z-dn.net/?f=a%3D12)
Answer:
![\frac{c}{4} =44](https://tex.z-dn.net/?f=%5Cfrac%7Bc%7D%7B4%7D%20%3D44)
Step-by-step explanation:
Answer:
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Step-by-step explanation: