1. What are 4 things the excretory system and the digestive system have in common? (not functions but like organs) 2. What are 4 things the excretory stystem have that the digestive system doesn't? (Same thing not functions but organs)
3.What are 4 things the digestive system have that the excretory system doesn't? (Same thing not functions but organs)

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

substitution is the answer in this case

the elements of art are the visual tools that the artist uses to create a composition. these are line, shape, color, value, form, texture, and space.

the principles of art and design are balance, contrast, emphasis, movement, pattern, rhythm, and unity/variety.

the sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

hope it ,

bioteacher101