Answer: The total number of labels printed by both machines during these two days is given by

Explanation:
Since we have given that
Number of printed labels on the day one by the first machine = 90
Speed of each machine = 30 labels per minute
Let the time taken by the first machine printed be 'x' minutes
Let the time taken by the second machine printed be 'y' minutes.
So, Number of printed labels by first machine on the following day = 30x
Number of printed labels by second machine on the following day = 30y
So, the total number of labels printed by both machines during these two days is given by
