Answer:
Focus of a Parabola. A parabola is set of all points in a plane which are an equal distance away from a given point and given line. The point is called the focus of the parabola and the line is called the directrix. The focus lies on the axis of symmetry of the parabola.
Step-by-step explanation:
Answer:

Step-by-step explanation:
We want to find the sum of

We can rewrite this as

This becomes;

Recall that;

This implies that;

Combine like terms:

Answer:
$78
Step-by-step explanation:
$65 x 1.20 = $78
or
$65 x 0.20 = $13
$65 + $13 = $78
Answer:
1 LBS
Step-by-step explanation:
there is one pound left