Which statements describe a parabola? check all that apply.
a parabola is the set of all points equidistant from the directrix and focus.
the fixed line is called the vertex of a parabola.
the focus is a fixed point inside the parabola.
the line of symmetry intersects the focus and directrix.
the line of symmetry and the directrix are perpendicular.
the parabola intersects the directrix.

First, third, fourth and fifth statements describe a parabola

Step-by-step explanation:

The correct statements are:

A parabola is the set of all points equidistant from the directrix and focus.

The focus is a fixed point inside the parabola.

The line of symmetry intersects the focus and directrix.

The line of symmetry and the directrix are perpendicular.

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: