Asapidentify the property used in each step. 12.2 + 18.6 + –4.3 + (–18.6) 12.2 + –4.3 + 18.6 + (–18.6) 12.2 + –4.3 + [18.6 + (–18.6)] 12.2 + –4.3 + (0) 12.2 + –4.3 7.9 asap if anyone can!

12.2 + 18.6 + –4.3 + (–18.6)

12.2 + –4.3 + 18.6 + (–18.6) This shows commutative property.

The commutative property states that order does nor matter. Multiplication and addition have commutative property.

12.2 + –4.3 + [18.6 + (–18.6)] This shows associative property.

The associative property states that we can re-group numbers in any order and get the same answer.

[18.6 + (–18.6)] ; This portion also shows additive inverse as you get 0 in the next step => 12.2 + –4.3 + (0)

The additive inverse of a number is that number, which you add to a number to get the sum of 0.

12.2 + –4.3 + (0) This shows identity property.

Identity property of addition states that when we add zero to any number, it equals the number itself. Like here adding 0 got the same number -4.3 in the next step.

3201

step-by-step explanation:

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: