Respuesta :

boldeagle
as formula says:

sum = [tex] n *\frac{ a_{1} + a_{n} }{2} [/tex]

in our case n = 10, a1 = 15 and An = 33 so the answer will be:

sum = 10 * (33 + 15)/2 = 10 * 48 / 2 = 10 * 24 = 240

Answer:

240

Step-by-step explanation:

Hope this helps! :)

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