The mass of the sandwich is 35 g.
Mass is the amount of matter contained in a body.
Total mass of a composite body such as a sandwich with, bread, jelly and peanut butter, is the sum of the masses of bread, jelly and peanut butter.

The mass of the sandwich is 35 g
Germany was the other member of the Triple Alliance that first supported Austria-Hungary's invasion of Serbia. The Triple Alliance was formed between the countries Austria-Hungary, Italy and Germany. This Alliance was a totally military alliance with a single goal and that was to protect one another if attacked by any other country. This alliance was also their to support in case any of the members attacked any other country. This alliance was signed by the three countries on 20th of May 1882 until the break of the World War I in the year 1914.
All cellular organelles, by definition, are surrounded by a membrane. Golgi bodies, mitochondria, the nucleus, endoplasmic reticulum, chloroplasts, all of these are surrounded by a membrane. And lysosomes are digestive sacs with a membrane.
The skeletal system and muscular system work together to be the musculoskeletal system. The skeletal system structure the body, carry the weight and protect bones.