maths

The 4th term of an ap is 15 while the 7th term is 27, find the sum of the 9th and 10th term.

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asked by thelma
  1. so 4n-1

    9th term would be 35 and 10th term would be 39. The sum is 74. I'm in grade four. I just figured it out.

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    posted by Anonymous

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