First find the amount of tax by multiplying 21 × 8.5%.
.085 × 21 = 1.785 = 1.79 (rounded)
Now add the tax back into the price...
21 + 1.79 = $22.79
10 whole sandwiches can be made with 2 pounds of cheese if each sandwhich has 3 ounces of cheese on it.
2 pounds = 32 ounces
32/3 = 10.67
The answer is: Perpendicular, because both equations intersects or cross over each other. There is an attached photo
C is the correct answer! hope this helped