math
posted by Jane .
Please show me how to work this problem:
Fran makes a rectangular tablecloth that has an area of 5 ft squared. Her mother makes a tablecloth that is three times the length and three times the width of Fran's. What is the area, in square feet, of her mother's tablecloth?

Think about it.
the current dimensions are x and y and xy=5
The new dimensions are 3x and 3y and the area is (3x)(3y) = 9xy = 9(xy) = 9 times the original area.
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