1. anonymous

What is an equation written in standard form of an ellipse centered at the origin with vertex (-7, 0) and co-vertex (0, 5)

2. anonymous

@Michele_Laino

3. Michele_Laino

here is the requested equation: $\Large \frac{{{x^2}}}{{{a^2}}} + \frac{{{y^2}}}{{{b^2}}} = 1$ where a= 7, and b=5

4. anonymous

5. anonymous

Alright, so it would be $\frac{ x ^{2} }{ 7^{2} } + \frac{ y ^{2} }{ 5^{2} } = 1$

6. Michele_Laino

yes!

7. anonymous

$\frac{ x ^{2} }{ 49 } + \frac{ y ^{2} }{ 25 } =1$

8. Michele_Laino

that's right!

9. Michele_Laino

it is option D

10. anonymous

Thank you so much!

11. Michele_Laino

:)