Respuesta :
Hello!
An unknown or changeable quantity is a variable. We can write these expressions below and see which one has a variable.
A. 15
B. 60(5)
C. 2p
D. $3.76
As you can see, we do not know how many pages are in the book. Therefore, our answer is C.
I hope this helps!
The number of pages of the book may vary or can change depending on the book.
We have to determine, Which phrase describes an unknown or changeable quantity?
According to the question,
"The number of pages of the book" is the one phrase among the following choices given in the question that describes an unknown or changeable quantity.
The correct option among all the options that are given in the question is the fourth option or option "C".
Hence, The number of pages of the book may vary or can change depending on the book.
To know more about the Phrase click the link given below.
https://brainly.com/question/1812413