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Math

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Barbara is playing a game. She jumps forward 5 feet, and then steps backward 2 feet. How many jumps will it take her to reach the finish line, which is 20 feet from where she started?

Make a table to show Barbara's position.

Barbara will reach 20 feet on jump number _____?

It will take Barbara ______ jumps forward before she passes the finish line.

  • Math -

    What did you find when you made the table?

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    Jump Number
    Position After jump forward
    Position after Step Back

  • Math -

    I don't have any idea.

  • Math -

    Good.

    According to your table, on which jump will she reach 20 feet?

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    After 7 jumps foward and 6 backward.

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    Jump 1: 0 +5 -2 = + 3
    Jump 2: 3 + 5 - 2 = +6

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    Thanks. Now I understand.

  • Math -

    You're welcome.

    Great! :-)

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