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An arithmetic series contains 20 numbers. The first number is 102. The last number is 159. Which expression represents the sum of the series?

Respuesta :

You would be skipping 2.85 numbers each time. 
I think you would take 159 subtract 102 from it and get 57. 
Then you would divide that by 20 to get your answer of 2.85

Answer:

B

Step-by-step explanation:

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