Paul has two label-printing machines. Each machine can print 30 labels per minute. On day 1, only the first machine was used, an
d it printed 90 labels. On the following day, the first machine printed for x minutes and the second machine printed for y minutes. Which expression shows the total number of labels printed by both machines during these two days? 120x + 30y
90 + 30x + 30y
30 + 90x + y
90x + 60y
