How do I solve the equation: -4 = -1 divided by 4*a

How do I solve the equation: -4 = -1 divided by 4*a

A road passes through a tunnel in the form of a semi-ellipse. In order to widen the road to accomodate more traffic,engineers must design a larger tunnel that is twice as wide and 1.5 times as tall...

The arch of a bridge is a semi ellipse with a horizontal major axis. The span is 30ft and the top of the arch is 10ft above the major axis. The roadway is horizontal and is 2ft above the top of the...

This is about Conics of Parabolas and Non-Linear Systems

The equation 4x^2+9y^2-36y = 0 defines a shifted ellipse. Write this equation in the standard form, find the center, focus, vertices of this ellipse, the lengths of major and minor axes and sketch...

identify the vertex and axis of symmetry of each then sketch the graph.

Write equation in standard form. Cirles, identify the center and radius. Identify ellipses and hyperbole identify the center.

Circles, ellipses, and hyperbolas identify the center. Write equation in standard form.

y^2= 16x-8

Y2-8x+10y+9=0

Identify the conic that this polar equation represents. Also, give the position of the directix. r=1/(1+costheta) The equation defines a circle. The equation defines an ellipse...

Find a polar equation for this conic. A focus is at the pole. e = 6; directrix is parallel to the polar axis 2 units below the pole r=12/(1+6costheta) r=12/(1-6costheta)...

Identify the conic that this polar equation represents. Also, give the position of the directix. r=3/(4-2costheta) The equation defines a circle. The equation defines a parabola....

Identify the conic that this polar equation represents. Also, give the position of the directix. r=4/(2-3sintheta) The equation defines an ellipse. The equation defines a parabola...

Identify this equation without completing the square. x2 + y2 - 8x + 4y = 0 The equation defines a circle. The equation defines an ellipse. The equation defines a hyperbola...

Find an equation for this ellipse. Graph the equation. Center at (0, 0); focus at (3, 0); vertex at (5, 0) 1 =

Find the vertex, focus, and directix of this parabola. y^2 - 4y + 4x + 4 = 0 Vertex ( , ) Focus ( , ) Directix = please help!!! &...

Find the vertex, focus, and directix of this parabola. Graph the equation. x^2 = 4y Vertex ( , ) Focus ( , ) Directix =

Find the vertex, focus, and directix of this parabola. Graph the equation. (y + 3)2 = 8(x - 2) Vertex ( , ) Focus ( , ) Directix = please...

find the equation of hyperbola whose axes are the co-ordinate axes with transverse axis equal to 2 and conjugate axis equal to 3. the standard forms of hyperbolas with center at the origin...