Johnetta simplified seven over nine divided by three over eight.; her work is shown below. identify where she made her error.
original division problem: seven over nine divided by three over eight.
step 1: seven over nine multiplied by three over eight.
step 2: seven times three over nine times eight.
step 3: twenty-one over seventy-two.
step 4: seven over twenty-four.

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:

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x

probably the last option

step-by-step explanation: