There are two accepted plural forms of the noun 'appendix', appendixes and appendices.
The plural possessive forms are appendixes' and appendices'.
Example: The appendixes' resources in these texts will help with your research.
The correct plural of appendix depends on the circumstances. If you are talking about the text at the end of a book or article, either the plural appendices or appendixes is correct. If you are talking about the organ in the body, appendixes is the only plural.
The plural form of appendix is appendices.
The singular possessive form is heart's; the plural possessive form is hearts'.
The plural form is valleys. The plural possessive is valleys'.
The plural form is replies. The plural possessive is replies'.
The plural form is founders. The plural possessive is founders'.
No, it is singular, the possessive form of it is its. The plural form of it is they or them, and the possessive form is their.To answer the question directly: there is no such word as ITS'.
The plural form is branches. The plural possessive is branches'.
The plural possessive form of "mass" is "masses'".
The plural possessive is experiments'.
The plural form is ravines. The plural possessive is ravines'.
The plural form of the noun mouthful is mouthfuls.The plural possessive form is mouthfuls'.