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DIA [1.3K]
3 years ago
12

What is the standard deviation for the data set? 138, 129, 145, 134, 142, 159, 153, 142, 127 Express your answer as a decimal to

the nearest tenth. Enter your answer in the box.
Mathematics
1 answer:
morpeh [17]3 years ago
6 0

Answer:

9.9107124982123

Step-by-step explanation:

You might be interested in
f(x) = -4x^2+12x-9f(x)=−4x 2 +12x−9f, left parenthesis, x, right parenthesis, equals, minus, 4, x, squared, plus, 12, x, minus,
Olin [163]

Answer:

The graph has only one x-intercept

Step-by-step explanation:

we have

f(x)=-4x^2+12x-9

we know that

The discriminant of a quadratic equation of the form

ax^{2} +bx+c=0

is equal to

D=b^{2}-4ac

in this problem we have

f(x)=-4x^2+12x-9

so

a=-4\\b=12\\c=-9

substitute

D=12^{2}-4(-4)(-9)

D=144-144

D=0

The discriminant is zero

That means ----> The quadratic equation has one real solution

The graph has only one x-intercept

3 0
3 years ago
Perform the indicated operations and chose the correct answer from the listed options.
ehidna [41]

Answer:

The correct answer is option C.  3

Step-by-step explanation:

It is given an expression in variable x

(x² + 3x²)/(x + 1) ÷ (x² - 9)/(3x + 3) * (x - 3)/x

<u>To find the simplified answer</u>

x² + 3x² = x(x + 3)

x² - 9 = (x + 3)(x - 3)

The given expression can be written as,

(x² + 3x²)/(x + 1) ÷ (x² - 9)/(3x + 3) * (x - 3)/x

 = x(x + 3)/(x + 1) * 3(x + 1)/(x + 1)(x - 1) * (x -3)/x

 =[ x(x +3) * 3(x +1) *  (x -3)]/[(x + 1) * (x + 3)(x - 3) *x]

 = 3

The correct answer is option C.  3

3 0
3 years ago
If DE = 37 cm and EF = 16 cm, then what are the possible lengths for DF so that DE,EF, and DF can form a triangle? Explain your
chubhunter [2.5K]

Answer:

The length of DF must be between 21 and 53.

Step-by-step explanation:

In a triangle, the length of two sides added together must exceed the length of the 3rd side. So, since EF is the shortest of the two givens, we know that EF + DF must be greater than DE. So we can plug in these numbers to find the minimum.

EF + DF > DE

16 + DF > 37

DF > 21

Now, for the upper maximum, we know that the two given lengths must be greater than the length of DF. So again, we can solve for the maximum using the amounts.

DE + EF > DF

37 + 16 > DF

53 > DF

With these two in mind, we know that DF must be between 21 and 53

4 0
3 years ago
The highest mountains in the world are the Himalayas, at the border between the Indian and Eurasian plates. The Himalayas formed
Advocard [28]

Answer:

transform boundary

Step-by-step explanation:

I'm not too sure, but a transform boundary is where two plates crash into each other, creating mountains.

5 0
3 years ago
What is revenue from property taxes usually used for?
grandymaker [24]
Revenue from property taxes is used to fund all the services the municipal government provides us with, such as building a new park in the neighbourhood.
4 0
3 years ago
Read 2 more answers
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