A rectangular-shaped carpet that measures x feet by y feet is priced at $9. What is the cost of the carpet, in dollars per square yard? (1 square yard = 9 square feet) Select the correct option:	A) 90/(xy)	B) 90xy	C) xy/90	D) xy/10	E) 81/(xy)
The area of the carpet in feet is xy.   The area in square yards is xy / 9.   The price per square yard is 9 / (xy/9) = 81/(xy).   The answer is 81/(xy).
<result>E</result>
A rectangular-shaped carpet that measures x feet by y feet is priced at $9. What is the cost of the carpet, in dollars per square yard? (1 square yard = 9 square feet)