Answer:
[tex]4[/tex]
Step-by-step explanation:
The total number of cars Ms. Owens has is [tex]15[/tex].
The number of cars left after Ms. Cook took some were [tex]11[/tex].
The number of cars taken by Ms. Cook will be the difference of the total number of cars and the number of cars left. So,
[tex]15-11=4[/tex]
Hence, the number of cars taken by Ms. Cook were [tex]4[/tex].