How many terms are there in a geometric series if the first term is 7, the common ratio is 2, and the sum of the series is 105? hint: (image attached below)  r ≠ 1, where a1 is the first term and r is the common ratio. options a) n = 3 b) n = 4 c) n = 5 d) n = 6

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103