Posted by **sam** on Thursday, April 26, 2012 at 5:16pm.

Write an equation in standard form for the hyperbola with center (0,0), vertex(4,0) , and focus (8,0).

- algebra 2 -
**Reiny**, Thursday, April 26, 2012 at 6:15pm
the major axis is horizontal and

a = 4, b = ? and c = 5

I recognize the 3-4-5 Pythagorean triangle, so b = 3

equation:

x^2/16 - y^2/9 = 1

- algebra 2 -
**sam**, Friday, April 27, 2012 at 1:29pm
That isn't one of the choses...

1) x^2/64-x^2/16=1

2)x^2/16-y^2/64=1

3)y^2/48-x^2/16=1

4)x^2/16-y^2/48=1

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