Questions

A + B = 15 .... (1)

B x C = 84 .... (2)

C ÷ 4 = 3  .... (3)

B + D = 18 .... (4)

From (3), we get C = 12

From (2), we get B = 84/12 = 7

From (1), we get A = 15 - 7 = 8

From (4), we get D = 18 - 7 = 11

Hence, D = 11.

All the given reactions are Decomposition reactions.

Decomposition reaction is a reaction in which only one reactant is splitted into two or more products.

Statistics is a branch of mathematics dealing with the collection, analysis, interpretation, presentation, and organization of data.

All scientists uses Statistics for analysing data.

Rights guaranteed by law, is the best description of Civil liberties.

Civil liberties are also called as personal freedoms. They are personal guarantees and freedoms that the government cannot abridge, either by law or by judicial interpretation, without due process.