Which of the following statements correctly uses the distributive property? A:-3(12 + 5) = -3(12) - (-3)(5)
B:7(9 - 8) = 7(9) - 8
C:-2(15 - 3) = -2(15) + (-2)(3)
D:9(-7 + 6) = 9(-7) + 9(6)

answer: true

step-by-step explanation:

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

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