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December 19, 2014

Homework Help: Algebra 2

Posted by Troy on Monday, April 7, 2008 at 12:56pm.

Can someone check my answers.

Write the following equations in standard form.

1) x^2 - 2x + y^2 + 4y = 11

answer: (x-1)^2 + (y+2)^2 = 16

2) 4x^2 + 24x - y + 34 = 0

answer: y = 4(x-3)^2 + 2

3) The graph of which equation is a circle?
A. 5x^2 + 10x = 9 + 5y^2
B. 5x^2 - 10x = 0 - 5y^2
C. 5x^2 + 5x + y^2 = 9
answer: C

4)Find the exact solution (s) of each system of equations:
x^2 + y^2 = 25 and 9y = 4x^2

answer: (3,4) (-3,4)

5)Which is the equation of an ellipse with center (-4,2) and a horizontal major axis?

answer: (x+4)^2/16 + (y-2)^2/4 = 1

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