Friday

November 28, 2014

November 28, 2014

Posted by **lindsay** on Sunday, April 29, 2012 at 12:25am.

a. x^2 + 2root7x +7 + (Y-root 11)^2 =11

b. x^2 -12x + 84 =-y^2 + 16y

- geometry -
**Henry**, Monday, April 30, 2012 at 5:04pma. Clarify Eq.

b. x^2-12x=84 -y^2+16y.

x^2-12x+(-12/2)^2+y^2-16y+(-16/2)^2 = -84+36+64.

x^2-12x+36+y^2-16y+(-16/2)^2 = -84.

x^2-12x+36+y^2-16y+64 = -84+36+64.

(x-6)^2+(y-8)^2 = 16.

C(6.8).

r^2 = 16.

r = 4.

**Answer this Question**

**Related Questions**

math - Write an equation of a circle with the center (-5,-4) and radius 6. The ...

Algebra - Could you please check some of my Algebra problems please? Write the ...

Trigonometry - 1) Find the coordinates of the point (-1,3) after the ...

College Algebra - Write the equation of a circle in standard Find the center, ...

pre calculus - Write the equation of the circle in standard form. Find the ...

NEED MAJOR HELP! *QUADRATIC EQUATIONS* - Write the equation for the circle with ...

GEOMETRY - The diameter of a circle has endpoints P(–10, –2) and Q(4, 6). a.Find...

maths - The equation of the circle is x(squared)+y(squared)-3x -4=0.Find : (i)...

geometry - Circle O is defined by the equation x2 + (y - 2)2 = 25. Plot the ...

geometry - This one is confusing me. please help The diameter of a circle has ...