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Marianna [84]
3 years ago
11

How to solve and graph this inequality 8-u>4

Mathematics
1 answer:
xxMikexx [17]3 years ago
8 0

Answer:

u < 4

Step-by-step explanation:

<u>Step 1:  Subtract 8 from both sides</u>

8 - u - 8 > 4 - 8

<em>-u > -4</em>

<em />

<u>Step 2:  Divide both sides by -1</u>

-u / -1 > -4 / -1

<em><u>Since you divide by a negative, you flip the sign.</u></em>

<em>u < 4</em>

<em />

Answer:  u < 4

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After entering the test scores from her Statistics class of 25 students, the instructor calculated some statistics of the scores
ss7ja [257]

Answer:

Std deviation would change but IQR would not change.

Step-by-step explanation:

Given that after entering the test scores from her Statistics class of 25 students, the instructor calculated some statistics of the scores. Upon checking, she discovered that she had entered the top score as 46, but it should have been 56.

When arranged in ascending order the last entry would be 56 instead of 46.

Hence this would not affect the middle entry or quartiles

i.e. in other words there would not be any change in the Interquartile range and Quartile 1 and Quartile 3 are not changed

But standard error would change.  this is because total of all entries now increase by 10, so average would increase by 10/25 = 0.40

This in turn would change the mean deviation x-average for each entry and hence square of deviations.  Thus variance would change and also standard deviation.

4 0
3 years ago
A candidate took a phone poll of 110 people. Of the 110 people polled, 87 said they would vote for the other person. There are 9
Drupady [299]
Using simple proportion it would be

87 * 9570
------------  =   7569 people
  110
8 0
4 years ago
Read 2 more answers
Someone, please do all my answers I really do not get anything!
Marianna [84]
I can’t see anything but a black paper
3 0
3 years ago
* Jenny marked on a coordinate plane all points with the first coordinate an integer between −12 and 7 and the second coordinate
Nat2105 [25]

Answer:

Jenny marks 414 different points on the coordinate plane.

Step-by-step explanation:

A point on a coordinate plane is represented by (x, y)

The possible values of x include all the integers between -12 and 7; that is,

-11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6.

The possible values of y include all the integers between -12 and 12; that is,

-11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11.

This means that each x-value can take on each y-value.

There are 18 x-values and 23 y-values.

Each x-value can form 23 different coordinates with all the available y-values.

18 x-values will form 18 × 23 different coordinates with the all the available y-values.

The total number of points that Jenny marks = 18 × 23 = 414.

Hope this Helps!!!

5 0
3 years ago
If f (x) = 5 x minus 25 and g (x) = one-fifth x + 5, which expression could be used to verify g(x) is the inverse of f(x)?
gayaneshka [121]

Answer:

f(g(x))=x

Step-by-step explanation:

Given a certain function f(x), and then its inverse function f^{-1}(x), the following expression is valid:

(f\cdot f^{-1})(x)=x

where the expression

(f\cdot f^{-1})(x)=f(f^{-1}(x))

indicates the composite function.

In this problem, we have:

f(x)=5x-25

And then, its inverse function is

g(x)=\frac{1}{5}x+5

To verify that g(x) is the inverse of f(x), the following expression must be true:

f(g(x))=x

Substituting the expression of g(x) into f(x), we find that:

f(g(x))=5g(x)-25=5(\frac{1}{5}x+5)-25=x+25-25=x

So, g(x) is the inverse of f(x).

6 0
3 years ago
Read 2 more answers
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