Choice (A) has zero slope becsuse her cost doesn't depend on the number of visits.
So for this, I will be using the substitution method. Firstly, subtract both sides in the second equation by 2x: 
Next, substitute y in the first equation with 7-2x, then solve for x from there:

Now that we got x, substitute it into either equation to solve for y:

In short, x = 1/2 and y = 6.
Answer:
CE
OPTIONS:
BE
CH
CE
DG
See attachment foe the figure.
Step-by-step explanation:
CE is the answer.
It doesn’t go through the middle, while the other 3 options do.
I believe that the missing letter would be E and S which would be in between S and T
Answer: 87.5
Step-by-step explanation: 1cm x 25cm = 87.5