Final answer:
The question lacks the necessary context or diagrams to provide a definitive answer. Usually, the difference between a point and a line is the shortest distance from the point to the line, and distances between points can be calculated using their coordinates and the Pythagorean theorem in three-dimensional space.
Step-by-step explanation:
The question seems to ask for the difference between a point x and a line wz, as well as how to find xz and the length of xy. Unfortunately, without more context or a diagram, it is not possible to provide specific numerical answers. Generally, the difference between a point and a line can refer to the shortest distance from that point to the line. The length xz would require the coordinates of points x and z to calculate the distance between them. To find the length of xy, similarly, the coordinates of points x and y are necessary. To determine the distance from a plane l to a point x, if given the appropriate coordinates and equation of the plane, one can use geometric or algebraic methods to compute this distance.
To express distances or intervals in three-dimensional space, one can use the formula p² = x² + y² + z² derived from the Pythagorean theorem for three-dimensional space. When provided with specific coordinates, these calculations can be done using a calculator or computer, often resulting in rounding the answer to a specified number of decimal places. The question excerpts provided, however, do not give enough information to solve the original problems posed.