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Mathematics 8 Online
OpenStudy (anonymous):

Select the set of equations that represents the following situation: The cost of eight CDs and fifteen DVDs is $186.31; and the cost of nine DVDs and thirteen CDs is $167.09. How much do a CD and a DVD cost? A. 8x • 15y = 186.31; 9x • 13y = 167.09, B. 8x + 15y = 186.31; 13x + 9y = 167.09, C. 8x + 15y = 186.31; 9x + 13y = 167.09, D. 8x • 15y = 186.31; 13x • 9y = 167.09

OpenStudy (anonymous):

I selected option B. It reprsents variable x and y remaining constant. x = CDs and y = DVDs.

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