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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 :

KJD857
given that 159-102=57

and 57/20=2.85

n=2.85

you would make the sum be 102+1n+2n.......20n= sum
jrgould72

Answer:

It's B

Step-by-step explanation:

20(102+159/2)

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