Alibrary 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? 28x − 5 15x2 − 5 15x2 + 28x − 5 15x2 + 22x − 5

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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