A rectangular-shaped carpet remnant that measures x feet by y feet is priced at $40. What is the cost of the carpet, in dollars per square yard? (9 square feet = 1 square yard) Choose the most appropriate option.
A) 50xy B) 450xy C) xy/9 D) xy/50 E) 360/(xy)
xy sq ft = $40   1 sq ft = $40/xy   multiplying by 9 on both side   9 sq ft = $360/xy   or 1 sq yard = $360/xy   Hence 360/(xy).
<result>E</result>
A rectangular-shaped carpet remnant that measures x feet by y feet is priced at $40. What is the cost of the carpet, in dollars per square yard? (9 square feet = 1 square yard)