Help plz

How is finding the volume of a composite figure like finding the surface area of a composite figure?

A. Live broadcast
Both can be found by using a formula that includes the length,
width, and height of the figure.

B. Both can be found by finding the total volume of the figure.

C. Both can be found by finding the measure of each figure that makes up the composite figure and then adding the measures.

D. Both can be found by subtracting the measure of one figure from the measure of the other figure.

x/3-10=8

x/3=18

x=48

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.