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OpenStudy (anonymous):
A library building is in the shape of a rectangle. Its floor has a length of (3x + 5) meters and a width of (5x - 1) meters. The expression below represents the area of the floor of the building in square meters. (3x + 5)(5x - 1) Which of the following simplified expressions represents the area of the floor of the library building in square meters? Answer 15x2 + 28x - 5 28x - 5 15x2 + 22x - 5 15x2 - 5
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OpenStudy (anonymous):
C
OpenStudy (anonymous):
you sure?
OpenStudy (rulnick):
trick question, C is "unsimplified" :) ... but yeah, it's C
OpenStudy (anonymous):
Oh thanks you guys :)
OpenStudy (rulnick):
That's FOIL, ICYW.
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