Part a: explain why x = 5 makes 4x − 1 ≤ 19 true but not 4x − 1 < 19. (5 points) part b: what value from the set {6, 7, 8, 9, 10} makes the equation 5x + 2 = 47 true? show your work. (5 points)

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:

the train arrives at 20: 27 hope i