# Which expression represents the number of parents?

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A problem states: "There are 9 more children than parents in a room. There are 25 people in the room in all. How many children are there in the room?"

Let c represent the number of children.

Which expression represents the number of parents?

A. c⋅9

B. c + 9

C. c−9

D. 9−c

A problem states: "There are 9 more children than parents in a room. There are 25 people in the room in all. How many children are there in the room?"

Let c represent the number of children.

Which expression represents the number of parents?

A. c⋅9

B. c + 9

C. c−9

D. 9−c

See a solution process below:

From the problem we can write:

The are 17 children in the room.

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The expression "2p" represents the number of parents, where "p" is the number of families.

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