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AysviL [449]
3 years ago
7

In a class of 7 there are 2 students who forgot their lunch. If the teacher chooses 2 students what is the probability that both

of them forgot their lunch
Mathematics
1 answer:
Sever21 [200]3 years ago
6 0
It is about a 28% chance.
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Simplify:<br>(ay<br>8<br>6.<br>5x - 25 30 - 6x​
maw [93]

Answer:

-x - 2530

Step-by-step explanation:

5x - 2530 - 6x

5x - 6x = -x

-x - 2530

6 0
3 years ago
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Which points are the verticles of the ellipse? Equations of ellipse
Mashutka [201]

Answer:

This question is solved in detail below. Please refer to the attachment for better understanding of an Ellipse.

Step-by-step explanation:

In this question, there is a spelling mistake. This is vertices not verticles.

So, I have attached a diagram of an ellipse in which it is clearly mentioned where are the vertices of an ellipse.

Vertices of an Ellipse: There are two axes in any ellipse, one is called major axis and other is called minor axis. Where, minor is the shorter axis and major axis is the longer one. The places or points where major axis and minor axis ends are called the vertices of an ellipse. Please refer to the attachment for further clarification.

Equations of an ellipse in its standard form:

\frac{x^{2} }{a^{2} }  + \frac{y^{2} }{b^{2} } = 1

This is the case when major axis the longer one is on the x-axis centered at an origin.

\frac{x^{2} }{b^{2} } + \frac{y^{2} }{a^{2} }  = 1

This is the case when major axis the longer one is on the y-axis centered at an origin.

where major axis length = 2a

and minor axis length = 2b

3 0
3 years ago
Suppose that you are asked if there would be a strong or weak correlation between the number of people shopping in malls and the
solong [7]

There could be a strong correlation between the proximity of the holiday season and the number of people who buy in the shopping centers.

It is known that when there are vacations people tend to frequent shopping centers more often than when they are busy with work or school.

Therefore, the proximity in the holiday season is related to the increase in the number of people who buy in the shopping centers.

This means that there is a strong correlation between both variables, since when one increases the other also does. This type of correlation is called positive. When, on the contrary, the increase of one variable causes the decrease of another variable, it is said that there is a negative correlation.

There are several coefficients that measure the degree of correlation (strong or weak), adapted to the nature of the data. The best known is the 'r' coefficient of Pearson correlation

A correlation is strong when the change in a variable x produces a significant change in a variable 'y'. In this case, the correlation coefficient r approaches | 1 |.

When the correlation between two variables is weak, the change of one causes a very slight and difficult to perceive change in the other variable. In this case, the correlation coefficient approaches zero

6 0
3 years ago
Read 2 more answers
Find the quotient of quantity of 4 times x to the 3rd power minus 12 times x to the 2nd power plus 8 times x all over negative 4
Readme [11.4K]

\displaystyle \frac{4x^3-12x^2+8x}{-4x}=\frac{4x^3}{-4x}+\frac{-12x^2}{-4x}+\frac{8x}{-4x}\\\\=-x^2+3x-2

This result corresponds to the first selection.

5 0
3 years ago
Which statements are true regarding the prism ?
DochEvi [55]

Answer:

Step-by-step explanation:The prism has 9 edges; the bases of the prism are triangles; and the prism has 5 faces.

Step-by-step explanation:

The bases of a prism are the faces that are parallel.  In this prism, the only faces that are parallel are the two triangles.  This means the bases are triangles.

In addition to the two parallel bases, there is a are three faces that join the sides of the bases.  This makes a total of 2+3 = 5 faces.

The edges are where the faces meet.  There are 3 edges around each base; this is 6.  There are also 3 edges connecting the lateral faces; this makes 6+3 = 9 edges.

4 0
3 years ago
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