Answer both questions for 20 points! you : )

4) cross multiply to get 3(2x - 6) = 6; multiply

6x - 18 = 6; add 18 to both sides

6x = 24; divide both sides by 6

x = 4

5) cross multiply to get 3(5x + 4) = 11x; multiply

15x + 12 = 11x; subtract 15x from both sides

12 = -4x; divide both sides by -4

-3 = x

I hope this helps!

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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step-by-step explanation: