A Rectangular Garden Is to Be Surrounded on Three Sides

question 22

Multiple Choice

A rectangular garden is to be surrounded on three sides by a fence costing $5 per foot and on one side by a stone wall costing $15 per foot. Let x be the length of the side with the stone wall, and let y be the length of each of the other three sides. Express the cost of enclosing the garden as a function of two variables.

• A) C(x, y) = (15x)(5y)
• B) C(x, y) = 15x + 5y
• C) C(x, y) = (20x)(10y)
• D) C(x, y) = 15x + 15y
• E) none of these

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