Does anyone play AHD on Ro-blox?

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For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2