Final answer:
The additive inverse of 4.2 is -4.2, and the multiplicative inverse of -12 is -0.0833. The correct answer is A) Additive: -4.2, Multiplicative: -0.0833.
Step-by-step explanation:
The additive inverse of a number is what you would add to the original number to get zero. For example, the additive inverse of 4.2 is -4.2 because 4.2 + (-4.2) = 0.
The multiplicative inverse, or reciprocal, of a number is what you would multiply by the original number to get one. For -12, the multiplicative inverse is -1/12 or about -0.083333..., since -12 * (-1/12) = 1.
Therefore, the correct answer is:
The additive inverse of 4.2 is -4.2, and the multiplicative inverse of -12 is -0.0833. The best matching option is A) Additive: -4.2, Multiplicative: -0.0833.