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Homework Help: Math

Posted by Haley on Tuesday, March 1, 2011 at 6:42pm.

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 - Ms. Sue, Tuesday, March 1, 2011 at 6:44pm

  What did you find when you made the table?
  

• Math - Haley, Tuesday, March 1, 2011 at 6:47pm

  Jump Number
  Position After jump forward
  Position after Step Back
  

• Math - Haley, Tuesday, March 1, 2011 at 6:53pm

  I dont have any idea.
  

• Math - Ms. Sue, Tuesday, March 1, 2011 at 6:54pm

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

• Math - Haley, Tuesday, March 1, 2011 at 6:56pm

  After 7 jumps foward and 6 backward.
  

• Math - Ms. Sue, Tuesday, March 1, 2011 at 6:58pm

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

• Math - Haley, Tuesday, March 1, 2011 at 7:02pm

  Thanks. Now I understand.
  

• Math - Ms. Sue, Tuesday, March 1, 2011 at 7:10pm

  You're welcome.
  
  Great! :-)
  

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