In a geometric sequence, a2=2, a3=20, and a4=200. Which equation can be used to find the nth term of the sequence, an? an=2n−1 an=2⋅18n−1 an=15⋅10n−1 an=10⋅2n−1

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]