Question

Hello can you please help me posted picture of question

Answer 1

It is the c)25-y^2-y^2 by 16-9 = 1

Answer 2

Answer:

`(25-y^2)/(16) + (y^2)/(9) = 1`

Step-by-step explanation:
For the first given equation, we will need to isolate the x². This can be done as follows:
x² + y² = 25
x² + y² - y² = 25 - y²
x² = 25 - y² ..................> I

For the second given equation:
We will remove every x² and substitute with its equivalence from I as follows:

`(x^2)/(16) + (y^2)/(9) = 1`


`(25-y^2)/(16) + (y^2)/(9) = 1`

Hope this helps :)