The answer for that question is square
Y= 3x - 7
subract 5 by -1 which is 6 and divide that by 4-2 which is 2 so 6 divided by 2 is 3. then subtract the y value by 6 to get 0,-7
X=14 in
Y=71 degrees
Z=18 in
1/12 = 0.083(3 is repeat)
so answer is first one on the left
X = The cost of each book of stamps
There for your expression would be:
3x + 4.50
3x is 3 book of stamps times x cost of each book.
Your 4.50 is your one time fee to mail the package.
Hope this helps! (: