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9 months ago

Multi step equation -3x-2=-1

Mathematics

1 answer:

Shkiper50 [21]9 months ago

8 0

x = -1/3

Explanation:

-3x-2=-1

collect like terms by adding +2 to both sides:

-3x -2 + 2 = -1 + 2

-3x = 1

Divide both sides by the coefficient of x:

coefficient of x = -3

-3x/-3 = 1/-3

x = -1/3

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Answer:

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For z1, where x1 = 460, μ = 500, σ = 20, n = 140

z score formula = (460 - 500)/ 20

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We find the probability of the z score using the z score table.

P(x = 460) = P(z = -2)

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For z2, where x2 = 540, μ = 500, σ = 20

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Converting to percentage

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= 95.45%

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