Tuesday

July 29, 2014

July 29, 2014

Posted by **lee** on Friday, February 22, 2013 at 11:21pm.

1) what are the vertex, focus, and directrix of the parabola with the given equation? x^2-8x-28y-124=0

vertex (4,-5) focus (0,7) directrix y=-12

2) write an equation of a circle with given center and radius. center(-7,-6) and radius 2.

(x+7)^2+(y+6)^2=4

3) write an equation for the translation of x^2+y^2=49 by 3 units left and 4 units up.

(x+3)^2+(y-4)^2=49

4) what is the center and radius of the circle with given equation? (x-1)^2+(y+1)^2=4

center (1,-1) radius 2

5) what is an equation of a parabola with the given vertex and focus? vertex(-2,5) focus (-2,6)

this one dont know

6) a radio station has a broadcast area in the shape of a circle with equation x^2+y^2=5,625 where the constant represents square miles.

graph the equation and state the radius in miles

what is the area of the region in which the braodcast from the station can be picked up.

r=sqrt5623

r=75miles

A=pisqrt2

A=pi(5,625)^2miles

A=17671.49 miles

**Related Questions**

algebra - 6. Find the equation of each parabola described below. a) parabola ...

Pre Cal - write the equations of the parabola, the directrix, and the axis of ...

Pre Cal Check - focus: (0,p) vertex: if not given, then it is assumed (0,0) ...

Algebra - Can someone tell me if I am right? I need to find the equation of a ...

maths - Given that the equation of the parabola is 5y^2 + 24x = 0. Find (1)The ...

Algebra II - Write an equation for the parabola with focus (1,3) and vertex (0,3...

algebra problem - I need to find the equation of a parabola. I am not sure if ...

Math - Find the vertex, focus, and directrix of the parabola. x^2 - 2x + 8y + 9...

Math - Find the vertex, focus and directrix of the parabola. 4x - y^2 - 2y - 33...

Pre-cal - Sketech the graph of the equation y^2+4y+2x+10=0. Identify the vertex...