Answer:
They cost the same amount
Step-by-step explanation:
Given
Lin:
where x = 14
Max:
for 14 days
Required
Which is less expensive?
Max charges has been given from the question as; $120 for 14 days.
To determine Lin's, we simply substitute 14 for x in 



The above result of y shows that Max charges for 14 days is also $120.
<em>Hence, they (Lin and Max) cost the same because they both equal to $120 for 14 days</em>
There is one potential solutions and no extraneous solutions.
It says that the value of a box above two boxes is found by adding the expressions in the two boxes. I filled in the boxes. The top box is 13x + 30, or option B.