Mathematics

Question

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?

2 Answer

  • Let c = number of children in the room.
    Let p = the number of parents in the room.

    There are 9 more children than parents in the room. Therefore
    c = p +9           (1)

    There are 25 people in the room. Therefore
    c + p = 25        (2)

    Answer:
    The expression for the number of parents is 
    p = 25 -c

    -------------------
    Note:
    We can determine the number of children and parents.
    Substitute (1) into (2).
    p + 9 + p = 25
    2p + 9 = 25
    2p = 25 - 9 = 16
    p = 16/2 = 8
    c = p + 9 = 8 + 9 = 17

    Number of children = 17
    Number of parents  = 8
  • Answer:

    The expression for the number of parents is  

    p = 25 -c

    Step-by-step explanation:

    I did the quiz and this was the answer :)

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