Answer :
Suppose Jenny publishes X post per day, and Antonio publishes Y post per day.
So, the combined number of posts will be X+Y multiplied by the number of days.
For example, if the numbers of days is Z, Jenny and Antonio published Z(X+Y) posts.
So, the combined number of posts will be X+Y multiplied by the number of days.
For example, if the numbers of days is Z, Jenny and Antonio published Z(X+Y) posts.