Answer:
15
Step-by-step explanation:
To find how many she bought, we have to divide. So we do 105/7=15.
Answer:
Subtract 2x from each side, Subtraction Property
Step-by-step explanation:


Simplify:

Subtract 1.12 on both sides:


Multiply both sides by 2:


900 : 1
The linear ratio = a : 30a = 1 : 30
volume ratio = 1³ : 30³ = 1 : 900
ratio of larger to smaller = 900 : 1