Answer:
![2i \sqrt{15}](https://tex.z-dn.net/?f=2i%20%5Csqrt%7B15%7D%20)
Step-by-step explanation:
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Answer:
12/18 = 4/6
Step-by-step explanation:
25a + 5b - 13
5(5a + b) - 13 is your answer
using the distributive property, we can distribute 5 to all terms within the parenthesis:
5(5a + b) - 13 = 25a + 5b - 13
5(5a) = 25a
5(b) = 5b
25a + 5b - 13 = 25a + 5b - 13 (True)
hope this helps
Isolate y in the first equation.
![2y = 10x](https://tex.z-dn.net/?f=2y%20%3D%2010x)
![y = 5x](https://tex.z-dn.net/?f=y%20%3D%205x)
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Then plug this into the second equation
![\frac{x^2}{64}-\frac{y^2}{36} = 1](https://tex.z-dn.net/?f=%5Cfrac%7Bx%5E2%7D%7B64%7D-%5Cfrac%7By%5E2%7D%7B36%7D%20%3D%201)
![\frac{x^2}{64}-\frac{(y)^2}{36} = 1](https://tex.z-dn.net/?f=%5Cfrac%7Bx%5E2%7D%7B64%7D-%5Cfrac%7B%28y%29%5E2%7D%7B36%7D%20%3D%201)
![\frac{x^2}{64}-\frac{(5x)^2}{36} = 1](https://tex.z-dn.net/?f=%5Cfrac%7Bx%5E2%7D%7B64%7D-%5Cfrac%7B%285x%29%5E2%7D%7B36%7D%20%3D%201)
![\frac{x^2}{64}-\frac{25x^2}{36} = 1](https://tex.z-dn.net/?f=%5Cfrac%7Bx%5E2%7D%7B64%7D-%5Cfrac%7B25x%5E2%7D%7B36%7D%20%3D%201)
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So
the final answer is choice A