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Post by brittcat09 on Feb 4, 2009 21:03:23 GMT -5
I do not understand my daughters 5th grade homework. She is supposed to find the missing values on the number lines.
The first one is 29 _ _ _ 57 _ 71. The _'s are the numbers that she has to fill in. Can you please help me.
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Post by debemery13833 on Aug 4, 2009 17:53:43 GMT -5
i need to know what 1/26 of $7254 is?
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Post by Gary H on Aug 14, 2009 20:37:26 GMT -5
What you have is an arithmatic sequence where each term is derived by adding a constant to the term before it. An example of an arithmatic sequence is: 12, 15, 18, 21, 24. The 2nd term, 15, is derived by adding 3 to the first term, 12. The 3rd term, 18, is derived by adding 3 to the 2nd term, which is 15.
Notice if you take any three consecutive numbers in the sequence say, 15, 18, and 21, the middle term is always the average of the two terms that are immediately before and after it. So, the average of 15 and 21 is (15+21)/2 = 36/2 = 18.
Applying the same logic to your daughter's specific problem, the term between 57 and 71 is (57+71) / 2 = 128/2 = 64. And we know the difference between 57 & 64 is 7 which is exactly the same difference between 64 and 71. So, we know each sequence is derived by adding 7 to the term previous to it.
Your answer should show:
29 36, 43, 50, 57, 64, 71
I hope this helps your daughter's problem. If you have further question, please e-mail me at garlian@hotmail.com.
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