Aparabola has a vertex at (0,0). the focus of the parabola is located at (4,0). what is the equation of the directrix? x =

The equation of directrix is x=-4.

Step-by-step explanation:

Given information: The vertex of the parabola is (0,0) and the focus of the parabola is (4,0).

A general equation of parabola is defined as

Where (h,k) is vertex, (h+p,k) is focus and x=h-p is directrix.

The vertex of the given parabola is (0,0).

The focus of the parabola is (4,0).

The value of p is 4.

The directrix of the parabola is

Therefore the equation of directrix is x=-4.

answer: when you burn wood, the carbon reacts with the oxygen in the air to create ash and smoke. that is a permanent change you cannot undo that.

step-by-step explanation:

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.