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Use an algebraic expression to represent each sequence of lengths shown below.

  1. Think of this as being a tightrope for Croakie to cross. How would you describe his path using this picture?

  2. This problem is very similar to part (a).
    If the lengths labeled '''' were instead labeled as '''', how would you write the expression?

  3. Use parts (a) and (b) as guides if you are having trouble. Remember that the variable represents a number, so you can use it in an expression just as you would a number.