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3 years ago

3. Show how √5 can be represented on the number line.

Mathematics

1 answer:

asambeis [7]3 years ago

3 0

Answer:

Take a line segment AB = 2 units (consider 1 unit = 2 cm) on x-axis.

Draw a perpendicular on B and construct a line BC = 1 unit length.

Join AC which will be √5 (Pythagoras theorem). Take A as center, and AC as radius draw an which cuts the x-axis at point E.

The line segment AC represents √5 unit

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Nataly_w [17]

Answer:

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Step-by-step explanation:

Given the data:

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Using the online regression calculator :

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3 years ago

Which image shows the correct position of M(-4,3)? is it Graph A, B, C, D! Please help

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Grading managers. Some companies "grade on a bell curve" to compare the performance of their managers and professional workers.

Monica [59]

Answer:

$\mu = 250, \sigma = 175.781$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the grades of a population, and for this case we know the distribution for X is given by:

$X \sim N(\mu,\sigma)$

For this case we have two conditions given:

$P(X$

$P(X>475) = 0.1$ or equivalently $P(X$

And the best way to solve this problem is using the normal standard distribution and the z score given by:

$z=\frac{x-\mu}{\sigma}$

So we can find a value from the normal standard distribution that accumulates 0.1 and 0.9 of the area in the left, for this case the two values are:

$z= -1.28, z=-1.28$

We can verify that P(Z<-1.28) =0.1[/tex] and P(Z<1.28) =0.9[/tex]

And then using the z score we have the following formulas:

$-1.28 = \frac{25 -\mu}{\sigma}$ (1)

$1.28 = \frac{475 -\mu}{\sigma}$ (2)

If we add equations (1) and (2) we got:

$\frac{25 -\mu}{\sigma} + \frac{475 -\mu}{\sigma} =0$

We can multiply both sides of the equation by $\sigma$ and we got:

$25+ 475 -2 \mu = 0$

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So then the answer would be:

$\mu = 250, \sigma = 175.781$

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3 years ago

Find the coordinates of quadrilateral PQRS with vertices P(1, 4), Q(-1, 4), R(-2, -4) and S(2, -4) under the translation (x,y)--

Georgia [21]

We apply the rule to each of the vertices:
(x, y) ---> (x-5, y + 3)
P (1,4) ---> (1-5,4 + 3) >> (-4, 7)
Q (-1,4) ---> (-1-5,4 + 3) >> (-6, 7)
R (-2, -4) ---> (-2-5, -4 + 3) >> (- 7, -1)
S (2, -4) ---> (2-5, -4 + 3) >> (-3, -1)
Answer:
<span> a.
P’(-4, 7), Q’(-6, 7) , R’(-7, -1) and S’(-3, -1)</span>

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4 years ago

3. Show how √5 can be represented on the number line.​

3. Show how √5 can be represented on the number line.