Classrooms on one side of the drama building are all

Last updated: 7/17/2022

Classrooms on one side of the drama building are all numbered with consecutive even integers. If the first room, the room with the smallest classroom number, on this side of the building is numbered y, write an expression in y for the sum of the first seven classroom numbers in a row. Then simplify this expression. The sum of the first seven classroom numbers in a row is