Answer:
The equation of hyperbola : 
Step-by-step explanation:
Given - This hyperbola is centered at the origin.
Foci: (0,-9) and (0,9) Vertices: (0,-7) and (0,7)
To find - Find its equation.
Solution -
We know that,
Equation of Hyperbola is represented by

Now,
Given that,
Foci : F(0, -9) and F'(0, 9)
So,
c = 9
And
Vertices : A(0,-7) and A'(0,7)
So,
a = 7
Also, we know that,
c² = a² + b²
⇒b² = c² - a²
⇒b² = 9² - 7²
⇒b² = 81 - 49
⇒b² = 32
So,
The equation of hyperbola becomes

Volume = 3.14 * 10 * 5^2 = 785
Answer:
x=1,-3
Step-by-step explanation:
Answer:
<em>it's an isosceles triangle, because two sides are the same length, and thus two angles are also the same.</em>
<em> * mark as brainliest please../;(</em>
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Step-by-step explanation:
Answer:
x = 20
Step-by-step explanation:
15/9 = x/12
180 = 9x
x = 20