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Verdich [7]
3 years ago
8

Determine the slope of the line passing through the given points (1,2) and (2,-1)

Mathematics
2 answers:
Semmy [17]3 years ago
8 0
The slope is 2, rise over run, 2 over 1
alex41 [277]3 years ago
3 0
I hope this helps you



slope=y2-y1/x2-x1



slope=2-(-1)/1-2


slope=3/-1


slope= -3
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2/3*2/3*1/3 + the chance that the fourth is the 5 or 6. 
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So the solution is : P=2/3*2/3*1/3 + 2/3*2/3*2/3*1/3
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A random sample of n = 9 structural elements is tested for comprehensive strength. We know the true mean comprehensive strength
irinina [24]

Answer:

Probability that the sample mean comprehensive strength exceeds 4985 psi is 0.99999.

Step-by-step explanation:

We are given that a random sample of n = 9 structural elements is tested for comprehensive strength. We know the true mean comprehensive strength μ = 5500 psi and the standard deviation is σ = 100 psi.

<u><em>Let </em></u>\bar X<u><em> = sample mean comprehensive strength</em></u>

The z-score probability distribution for sample mean is given by;

                          Z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n} } } ~ N(0,1)

where, \mu = population mean comprehensive strength = 5500 psi

            \sigma = standard deviation = 100 psi

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

Now, Probability that the sample mean comprehensive strength exceeds 4985 psi is given by = P(\bar X > 4985 psi)

    P(\bar X > 4985 psi) = P( \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n} } } > \frac{4985-5500}{\frac{100}{\sqrt{9} } } ) = P(Z > -15.45) = P(Z < 15.45)

                                                                  = <u>0.99999</u>

<em>Since in the z table the highest critical value of x for which a probability area is given is x = 4.40 which is 0.99999, so we assume that our required probability will be equal to 0.99999.</em>

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PLS HELP MY GRADES CLOSE TOMMORW Which side lengths form a right triangle?
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A. -h to the 20th power 
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