1 answer
(click or scroll down)
Let's assume the number of playlists on Ashley's app is X.
The number of playlists on Liam's app is 4 times the number of playlists on Ashley's app, so it's 4X.
The total number of playlists on both apps is at least 45, so we have the inequality:
X + 4X ≥ 45
Combining like terms, we get:
5X ≥ 45
Dividing both sides by 5, we have:
X ≥ 9
Therefore, the number of playlists on Ashley's app (X) must be at least 9.