Answer:
C. 9 lbs.
Step-by-step explanation:
80 ounces = 5 pounds
64 ounces = 4 pounds
5 pounds + 4 pounds =
9 pounds / 9 lbs.
Add 4 to both sides
13 + 4 = w/-3 - 4 + 4
17 = w/-3 Multiply through by -3
17*-3 = -3*(w/-3)
-51 = w
12 copies=$40
1 copy=$40÷12=$3.33
18 copies=$3.33×18=$60
