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Montano1993 [528]
2 years ago
6

Plot and label all the points that are 4 units from point P AND that share the same x coordinate as point P. Write the coordinat

es for all the points in the box below. Point P (-2,1) NO FILES.
Mathematics
1 answer:
Lilit [14]2 years ago
7 0
The answers should be: (-2,5), (-2,-2), (-6,-1), (2,1)





Hope this helped :)
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3 years ago
What is the value of the expression shown? 4(-2) + (-10) + 3(-8)
Vlad [161]

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-42

Step-by-step explanation:

1. 4(-2)

2. 3(-8)

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7 0
2 years ago
The comprehensive strength of concrete is normally distributed with μ = 2500 psi and σ = 50 psi. Find the probability that a ran
VARVARA [1.3K]

Answer:

The probability that the diameter falls in the interval from 2499 psi to 2510 psi is 0.00798.

Step-by-step explanation:

Let's define the random variable, X = "Comprehensive strength of concrete". We have information that X is normally distributed with a mean of 2500 psi and a standard deviation of  50 psi (or a variance of 2500 psi). In other words, X \sim N(2500, 2500).

We want to know the probability of the mean of X or \bar{X} that falls in the interval [2499;2510]. From inference theory we know that :

\bar{X} \sim N(2500, \frac{2500}{5}) \Rightarrow \bar{X} \sim N(2500,500)

Now we can find the probability as follows:

P(2499 \leq \bar{X} \leq 2510) \Rightarrow P(\frac{2499 - 2500}{500} \leq \frac{\bar{X} - 2500}{500} \leq \frac{2499 - 2500}{500} ) \Rightarrow\\\Rightarrow P(-0.002 \leq \frac{\bar{X} - 2500}{500} \leq 0.02 ) \Rightarrow P(-0.002 \leq Z \leq 0.02 )

Where Z \sim N(0,1), then:

P(-0.002 \leq Z \leq 0.02 ) \approx P(0 \leq Z \leq 0.02 ) = P(Z \leq 0.02 ) - P(Z \leq 0) \\P(0 \leq Z \leq 0.02 ) = 0.50798 - 0.5 = 0.00798

8 0
3 years ago
What is the answer to this question?
tia_tia [17]

Answer:

b 20.6

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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