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Advanced Math Difficulty: Medium

The area A, in square centimeters, of a rectangular painting can be represented by the expression ww+29, where w is the width, in centimeters, of the painting.  Which expression represents the length, in centimeters, of the painting?

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Explanation

Choice C is correct. It's given that the expression ww+29 represents the area, in square centimeters, of a rectangular painting, where w is the width, in centimeters, of the painting. The area of a rectangle can be calculated by multiplying its length by its width. It follows that the length, in centimeters, of the painting is represented by the expression w+29.

Choice A is incorrect. This expression represents the width, in centimeters, of the painting, not its length, in centimeters.

Choice B is incorrect. This is the difference between the length, in centimeters, and the width, in centimeters, of the painting, not its length, in centimeters.

Choice D is incorrect. This expression represents the area, in square centimeters, of the painting, not its length, in centimeters.