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Find the third,fifth and seventh term sequence described by each rule a(n)=n+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.]

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq