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Mathematics 9 Online
OpenStudy (anonymous):

A boardwalk that is x feet wide is built around a rectangular pond. The combined area of the pond and the boardwalk is 4xsquared + 140x+1200 square feet. What are the dimensions of the pond? a. 100 ft by 60 ft c. 55 ft by 70 ft b. 30 ft by 40 ft d. 15 ft by 80 ft

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