How can you determine the coordinates of the care after a reflection over either axis

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.

Determine the area of a triangle with (see picture below)