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Mingtao Sun · Answer 1 · 2021-07-18T06:28:20+0000

Answer: C

Step-by-step explanation: given the formula 9n(n-2) + 7 and we have to find when n is 6 so the formula equals 9n^2 -18n + 7 and plugging in n gives us 324 - 108 + 7 = 216 + 7 = 223.

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