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OverLord2011 [107]
3 years ago
11

Phillip departed from town A with coordinates (1, 6) towards town B with coordinates (7, 6). At the same time Bruce headed from

town B to town A. What are the coordinates of point C where they will meet if the ratio of Phillip's to Bruce's rates is 7:5, respectively?
Mathematics
1 answer:
Lana71 [14]3 years ago
6 0

Step-by-step explanation:

First we need to determine the length of the path they're walkin on. We do this with the following equation:

\sqrt{(x1 - x2)^{2} + (y1 - y2)^{2}  }

Let's fill it in:

\sqrt{(1 - 7)^{2} +(6 - 6)^{2}  } =  \sqrt{36}  = 6

They walk 7:5 respectively 7+5=12 so on 6 units they'll walk 12/6=2 so 7/2:5/2=3.5:2.5

3.5 units right from (1,6) is 1+3.5=4.5 which gives us (4.5,6)

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Suppose that the IQs of university​ A's students can be described by a normal model with mean 150150 and standard deviation 77 p
NeX [460]

Answer:

The probability that the​ student's IQ is at least 140 points is of 55.17%.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value 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. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

University A: \mu = 150, \sigma = 77

a) Select a student at random from university A. Find the probability that the​ student's IQ is at least 140 points.

This is 1 subtracted by the pvalue of Z when X = 140. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{140 - 150}{77}

Z = -0.13

Z = -0.13 has a pvalue of 0.4483.

1 - 0.4483 = 0.5517

The probability that the​ student's IQ is at least 140 points is of 55.17%.

3 0
3 years ago
If the wages of workers for a given company are normally distributed with a mean of $15 per hour, then the proportion of the wor
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The proportion of the workers earning more than $13 per hour is greater than the proportion earning less than $13 per hour.

<h3>What is a normal distribution?</h3>

A normal distribution is a probability distribution that is symmetric around the mean of the distribution. This means that the there are more data around the mean than data far from the mean. A normal distribution is also known as the Gaussian distribution. When depicted on a graph, a normal distribution is bell-shaped.

To learn more about a normal distribution, please check: brainly.com/question/25846196

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There are 12 donuts in a dozen. You are allowed to eat 2. How many different combinations of donuts could
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Answer:

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

3 0
4 years ago
Read 2 more answers
If (x + 2) is a factor of x3 − 6x2 + kx + 10, k =
mafiozo [28]
Hello:
let : f(x) = <span>x3 − 6x2 + kx + 10
</span><span>If (x + 2) is a factor of x3 − 6x2 + kx + 10  : f(-2) = 0
(-2)^3-6(-2)² +k(-2)+10=0
-8 -24-2k +10 = 0
-2k =8+24-10
-2k = 22
k = -11</span>
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4 years ago
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