Do cognate words always stem from the same root?

A cognate is a word derived from the same root as another word.

Cognates are words that have a common origin (source). They may happen in a language or in a group of languages.

The general rule is that cognates have similar meanings and are derived from the same root (origin).

c) by giving an example of how mary beth tinker did, in fact, disrupt her mathematics class

explanation:

petitioner john f. tinker, 15 years of age, and solicitor christopher eckhardt, 16 years of age, went to secondary schools in des moines, iowa.