There are 15 straws in each pack.
There are 48 straws in each box.
Tricia buys p packs of straws and b boxes of straws.
Write down an expression in terms of b and p, for the total number of straws bought by Tricia.
Since there are 15 straws in each pack, and Tricia buys p packs of straws, we start off with 15p. Since there are 48 straws in each box, and Tricia buys b boxes of straws, we have 48b. So we have 15p+48b.
