Angus uses the expression in the box to calculate the total cost of tiling his kitchen. The expression includes the cost of the tiles, other raw materials, the labor charges of a
contractor to execute the project.
70x(x + 5) + 100
If the length of the kitchen is 5 feet more than its width, what does 70 represent?
A the labor charges of the contractor
B the total cost of the raw materials
C the total area of the kitchen
D the cost of raw material per unit area
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