Select all that apply.

Which of the following is true of all four civilizations—India, China, Egypt, and Sumer?

They were located between two rivers.

They established trade routes.

They developed irrigation systems.

They believed in many gods.

They developed in river valleys.

They invented plumbing systems.

Germany's black forest is being destroyed as a result of which environmental issue ?

Me asap worth brainlieist and 50 points

Dominic and stacy each have a stamp collection. dominic has six fewer stamps than three times the number of stamps stacy has. dominic and stacy decide to give all of their stamps to their younger sister, mary. if stacy had s stamps, which expression represents the number of stamps that mary received? a. (3s − 18)(3s − 6) b. 2s − 18 c. 4s − 6 d. 4s − 18