Answer:
B
Step-by-step explanation:
Because Sandy have 9 more than henry, so +9. Henry have 3 time as Roger. Roger's CD is y. 3 times mean multiply by 3. So, 3y, but we have to subtract a y because it is asking how many Sandy have MORE than Roger, so 2y. Then add the 9 and it will be (2y+9) CD's that Sandy have more than Roger.
