All you have to do is write your question and someone will answer. For example, instead of writing "I do not understand how I find answers on here" you would ask something like what is 9*5? Then 2 people will see your question and answer. There are no pre-recorded answers, everything happens live. Hope this helps!
ANSWER

EXPLANATION
The expressions are

and

The greatest common factor is the product the least powers of the common factors.

Answer:
4.5 cups
Step-by-step explanation:
Bob charges $140
Andy charges $135
Andy is cheaper