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mr Goodwill [35]
3 years ago
8

A line with a slope of -2 crosses the y-axis at (0, 3). The equation of the line is ____

Mathematics
1 answer:
strojnjashka [21]3 years ago
7 0

Answer:

y=-2x+3

Step-by-step explanation:

equation for slope is y=mx+b

the slope is -2 so that equals m

(0,3) is the y-intercept

y=b

3 is the y value making it substitute b making the equation y=-2x+3

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Answer:

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yKpoI14uk [10]

Answer:

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Step-by-step explanation:

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Standard Deviation, σ = 6.4

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Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}        

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P(20 \leq x \leq 30) = P(\displaystyle\frac{20 - 24}{6.4} \leq z \leq \displaystyle\frac{30-24}{6.4}) = P(-0.62 \leq z \leq 0.94)\\\\= P(z \leq 0.94) - P(z < -0.62)\\= 0.8264 - 0.2676 = 0.5588 = 55.88\%

P(20 \leq x \leq 30) = 55.88\%

b) Sampling distribution

Sample size, n = 22

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P(20 \leq x \leq 30) =99.84\%

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In the triangle below, m ∠ 1 = 39 ° and m ∠ 4 = 85 ° . What is m ∠ 2 ?
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