What is the standard deviation of the data set? Round to the nearest tenth if needed. 2, 4, 7, 8, 9


2.6


7


6


2.9

Answers

Answer 1

https://www.superprof.es/apuntes/escolar/matematicas/estadistica/descriptiva/ejercicios-y-problemas-de-desviacion-media.html


Related Questions

67+38 (mod5)
pls can someone help me with this question ​

Answers

Answer:

67 + 38(mod5)

= 67 + 38 =105÷5 (mod5)

= 21 reminder 0 ( mod 5)

Since while handling modes or finites the reminder is always considered therefore;

67 + 38 = 0 ( mod 5)

help me solve this plz

Answers

Answer:

sorry but this photo is not clear

Answer:

blur photo cannot answered

Solve : x/3-2/5 = 2x/15-3/5

Answers

Solution:

x/3-2/5 = 2x/15-3/5

(x/3)/15 - (2/5)/15 = (2x/15)/15 - (3/5)/15
5x - 6 = 2x - 9
5x = 2x - 9 + 6
5x - 2x = -9 + 6
3x = -3
3x/3 = -3/3
x = -1

Therefore the value of x is -1


Can someone help with this please?

Answers

[tex]7^2=7\cdot7=49\\\\8^2=8\cdot8=64\\\\\sqrt{49}<\sqrt{52}<\sqrt{64}\\\\\text{Answer}:52[/tex]

Answer:

Its 52

Step-by-step explanation:

the square root of 52 is 7.2

solve for x
-2^2(-5x+10)=100

Answers

Answer:

[tex]x=7[/tex]

Step-by-step explanation:

Hi there!

[tex]-2^2(-5x+10)=100[/tex]

Solve -2^2:

[tex]-4(-5x+10)=100[/tex]

Divide both sides by -4:

[tex]\displaystyle \frac{ -4(-5x+10)}{-4}=\frac{100}{-4} \\\\-5x+10=-25[/tex]

Subtract 10 from both sides:

[tex]-5x+10-10=-25-10\\-5x=-35[/tex]

Divide both sides by -5:

[tex]\displaystyle \frac{-5x}{-5} = \frac{-35}{-5} \\\\x=7[/tex]

Therefore, x = 7.

I hope this helps!

3 3/4 + 8/5 ÷ 2 2/3

step by step please

Answers

Hope this helps!

1) convert the proper fractions into improper fractions.
2) divide the 8/5 by 8/3 (keep, change, flip)
3) multiply the first fraction by five and the second fraction by four, so each fraction has the same denominator.
4) add the fractions together, then convert to decimal points or a proper fraction.

there's a crab on the ocean floor 60 ft below sea level and a bird 120 ft in the air how far apart are the crab and the bird

Answers

Answer:

180 feet

Step-by-step explanation:

|-60+120| is 180

Answer:

is it 180 feet apart if it is then here is the steps

Step-by-step explanation:

120+60 = 180

please mark as brainiest

Which of the following are factors of 11?
A/1
B/11
C/4
D/5
E/0
F/22

Answers

Answer:

B, F

Chow,...!

7. Evaluate the following:
a. 41-81
b. 21-3| + 4(7)
c. 81-21 - 6
d. 51-41 + 21-61

Answers

a.-40

b.--280

c.54

d.30

HELPPP PLEASEEEE WILL GIVE BRAINLIEST

Answers

42 feet.

Step-by-step explanation:

I think that it is 42 but don't know

The Garcia family has two cars. Last week, the first car consumed 30 gallons of gas and the second consumed 25 gallons of gas. The two cars drove a combined total of 1,250 miles, and the sum of their fuel efficiencies was 45 miles per gallon. What was the fuel efficiency of each of the cars last week?

Answers

Answer:

25 and 20 milies/gallons

Step-by-step explanation:

Let the fuell efficientcy of the first and the second car be f and s in gallons/miles.

Then the distance traveled by car 1 is 30 f and the car 2 is 25 s.

Since we also know that 1250 is the total distance traveled then

30 f + 25 s = 1250    (1)

Moreover we know that the efficiency is 45 miles/gallon. Hence

f + s  = 45

Multiply by 30 we have

30 f  + 30 s = 1350   (2)

Subtract the (1) equation from (2) we have

5s = 100

s = 20

f + 20 =45

f = 25

So the efficiency of the first car is 25 miles/gallons while the second one is 20 miles/gallons.

A truck driver drives at a constant rate of 60 miles per hour while on the highway. Which equation represents the distance, d, in miles, the truck driver has driven as a function of time in hours, h?

A. h = 60d
B. d = 60h
C. h = 60 + d
D. d = 60 - h

Answers

Answer:

b

Step-by-step explanation:

8 less than the product of a number and 4 is 20

Answers

the answer to your question is 13

Answer:

This word phrase into a equation is

4x -8 = 20

I need help with #47 to #50 ASAP…. Please help me with it

Answers

Step-by-step explanation:

a triangular number n is the sum of all natural numbers <= n.

t1 = 1

t2 = 1+2 = 3

t3 = 1+2+3 = 6

t4 = 1+2+3+4 = 10

...

so,

tn = tn-1 + n

47.

1×8 + 1 = 9 is a square number.

3×8 + 1 = 25 is a square number

6×8 + 1 = 49 is a square number

10×8 + 1 = 81 is a square number

48.

1/3 = 0 remainder 1

3/3 = 1 remainder 0

6/3 = 2 remainder 0

10/3 = 3 remainder 1

15/3 = 5 remainder 0

21/3 = 7 remainder 0

28/3 = 9 remainder 1

so, there seems to be a pattern 1 0 0 1 0 0 1 0 0 1 ...

49.

1/4 = 0 remainder 1

4/4 = 1 remainder 0

9/4 = 2 remainder 1

16/4 = 4 remainder 0

25/4 = 6 remainder 1

36/4 = 9 remainder 0

49/4 = 12 remainder 1

so, there seems to be a pattern 1 0 1 0 1 0 1 0 1 0 1 ...

50.

polygonal numbers is the real name for this.

the formula for dimensions = 5 is

(3n² − n)/2

for dimensions = 6 it is

2n² - n

so, dimensions=5 (and therefore dividing also by 5) we get the remainders

1/5 = 0 remainder 1

5/5 = 1 remainder 0

12/5 = 2 remainder 2

22/5 = 4 remainder 2

35/5 = 7 remainder 0

51/5 = 10 remainder 1

70/5 = 14 remainder 0

92/5 = 18 remainder 2

117/5 = 23 remainder 2

145/5 = 29 remainder 0

here the pattern is 1 0 2 2 0 1 0 2 2 0 1 0 2 2 0 ...

dimensions=6 (and therefore dividing also by 6) we get the remainders

1/6 = 0 remainder 1

6/6 = 1 remainder 0

15/6 = 2 remainder 3

28/6 = 4 remainder 4

45/6 = 7 remainder 3

66/6 = 11 remainder 0

91/6 = 15 remainder 1

120/6 = 20 remainder 0

153/6 = 25 remainder 3

190/6 = 31 remainder 4

231/6 = 38 remainder 3

276/6 = 46 remainder 0

325/6 = 54 remainder 1

here the pattern is 1 0 3 4 3 0 1 0 3 4 3 0 1 0 3 4 3 0 ...

Find the measure of unknown angle​

Answers

Answer:

The angle in the upper right quadrilateral corner = 68 degrees because vertical angles are equal.

Angle Y = 68 (opposite quadrilateral angles are equal).

All quadrilateral angles add to 360 so:

68 + 68 + x + z = 360 = 292

angle X + Z = 292

Therefore angle x = angle z = 146

Step-by-step explanation:

Answer:

Step-by-step explanation:

angle Z = 68 degree (being alternate angles)

angle X = 68 degree (opposite angle of a parallelogram is equal)

y + z = 180 degree (sum of adjecent angles of a parallelogram is 180 degree)

y + 68 = 180

y = 180 - 68

y = 112 degree

What is 6(x-6)+12=6(x+1)-3x show your work.

Answers

This is your awnser I hope it helped “X=10 “

Select the function that is modeled by the graph.
A. y = 1/2x + 3
B. y = 1/2x - 3
C. y = - 1/2x + 3
D. y = - 1/2x - 3

Answers

Answer:

B is the answerrrrrrrrrr

Answer:

B

Step-by-step explanation:

The y-intercept is at -3 and the slope which is 2/4 simplified to 1/2x is going in a positive direction

Solve the following system by using substitute
x - 4y = 28
7y - 6x = - 15

Answers

Answer:

y = -9

x = -8

Step-by-step explanation:

x = 28 + 4y

7y - 6(28 + 4y) = -15

7y - 168 - 24y = - 15 ---> *distribute the -6, not positive 6*

-17y = 153

y = -9

x = 28 + 4(-9)

x = -8

There are 3 consecutive integers. Four times the smallest integer is equal to six more than three times the largest integer. What is the smallest of the 3 integers

Answers

The smallest of the three consecutive integers be x,(x+1),(x+2) = 12, 13,14  is 12

Let's consider the number will be in form of x

Consecutive Integers:

we number or count items in a sequence, we use consecutive integers. In other words, consecutive integers are integers that follow each other in a sequence with a difference that is fixed.

the three consecutive integers be x,(x+1),(x+2)

As per the problem,

Four times the smallest integer is equal to six more than three times the largest integer

4x=3(x+2) +6

∴4x=3x+6 +6

∴4x−3x=6+6

x= 12

Smallest number = x= 12

middle number   X+1 = 12+1 =13

Highest number = x+2 = 12+2 = 14

the three consecutive integers be x,(x+1),(x+2) = 12, 13,14

Learn more about the three consecutive integers: brainly.com/question/841485

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X+2/x-3 + x-3/x+2 = 5/2

Answers

Answer:

[tex]x_{1} =\frac{-17- \sqrt{129}}{2}, x_{2} =\frac{-17+ \sqrt{129}}{2} [/tex]

Step-by-step explanation:

[tex] \frac{x + 2}{x + 3} + \frac{x - 3}{x + 2} = \frac{5}{2} [/tex]

[tex] \frac{x + 2}{x + 3} + \frac{x - 3}{x + 2} = \frac{5}{2} [/tex]

[tex] \frac{x + 2}{x + 3} + \frac{x - 3}{x + 2} - \frac{5}{2} = 0[/tex]

[tex] \frac{2(x + 2 {)}^{2} + 2(x + 3) \times (x - 3) - 5(x + 3) \times (x + 2) }{2(x + 3) \times (x + 2)} = 0[/tex]

[tex] \frac{2(x + 2 {)}^{2} + 2( {x}^{2} - 9) + ( - 15x - 15) \times (x + 2) }{2(x + 3) \times (x + 2)} = 0 [/tex]

[tex] \frac{2( {x}^{2} + 4x + 4) - 3 {x}^{2} - 48 - 25x}{2(x + 3) \times (x + 2)} = 0[/tex]

[tex] \frac{2 {x}^{2} + 8x + 8 - 3 {x}^{2} - 48 - 25x }{2(x + 3) \times (x + 2)} = 0[/tex]

[tex] \frac{ - {x}^{2} - 17x - 40 }{2(x + 3) \times (x + 2)} = 0[/tex]

[tex] {x}^{2} + 17x + 40 = 0[/tex]

[tex]x = \frac{ - 17± \sqrt{ {17}^{2} - 4 \times 1 \times 40 } }{2 \times 1} [/tex]

[tex]x = \frac{ - 17± \sqrt{289 - 160} }{2} [/tex]

[tex]x = \frac{ - 17± \sqrt{129} }{2} [/tex]

[tex]x_{1} =\frac{-17- \sqrt{129}}{2}, x_{2} =\frac{-17+ \sqrt{129}}{2} [/tex]

Which of the following is a flat surface that extends infinitely, has length and width, but does not have depth?

Angle
Circle
Plane
Segment

Answers

Hey there!

The correct answer is :

'Angle'

Angle:

In Euclidean geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle. Angles formed by two rays lie in the plane that contains the rays. Angles are also formed by the intersection of two planes.

Hope it help you

PLEASE HELP!

Solve for $x$: $x = \frac{x}{6} + \frac{x}{12} + \frac{x}{7} + 5 + \frac{x}{2} + 4$

This is due today and is the last problem pleaseee

Answers

Answer:

9[tex]\frac{75}{84}[/tex]

get a common denominator between 6,12,7,2 = 84

Step-by-step explanation:

[tex]$x$: $x = \frac{x}{6} + \frac{x}{12} + \frac{x}{7} + 5 + \frac{x}{2} + 4$[/tex]

The solution is x = 84

The value of the equation is A = 84

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , the value of A is

x = ( x/6 ) + ( x/12 ) + ( x/7 ) + 5 + ( x/2 ) + 4   be equation (1)

On simplifying the equation , we get

x = [ ( x/6 ) + ( x/12 ) + ( x/7 ) + ( x/2 ) ] + 9

Now , on further simplification , we get

x = [ ( x/7 ) + ( x/2 ) ] + [ ( 2x + x ) / 12 ] + 9

x = ( 3x/12 ) + [ ( 2x + 7x ) / 14 ] + 9

x = ( 3x/12 ) + ( 9x/14 ) + 9

On simplifying the equation , we get

x = ( x/4 ) + ( 9x/14 ) + 9

x = [ ( 14x + 36x ) / 56 ] + 9

x = ( 50x / 56 ) + 9

Subtracting ( 50x/56 ) on both sides of the equation , we get

9 = x - ( 50x/56 )

9 = ( 56x - 50x ) / 56

6x/56 = 9

Multiply by 56 on both sides of the equation , we get

6x = 504

Divide by 6 on both sides of the equation , we get

x = 504/6

x = 84

Therefore , the value of x is 84

Hence , the equation is A = 84

To learn more about equations click :

https://brainly.com/question/19297665

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helpppp please asappp

Answers

Answer: i may be wrong but is it 4?

Solve for x.



3x = -39

x = 3
x = -13
x = -3

Answers

[tex]3x=-39\\\\x=-39:3\\\\\huge\boxed{x=-13}[/tex]

please help if you can, it's due soon :) ​

Answers

Answer:

<SDQ

Step-by-step explanation:

Eg if a = b, b = c, then a = c

The screen size of a tablet is determined by the length of the diagonal of the rectangular screen. The 9.7-inch iPad
Air comes in a 4:3 format, which means that the ratio of the length to width of the rectangular screen is 4:3. What is
the area of the iPad's screen?

Answers

Using area of a rectangle, it is found that the area of the iPad's screen is of 45.2 square inches.

---------------------

The area of a rectangle of length l and width w is given by:

[tex]A = lw[/tex]

---------------------

The diagonal of a rectangle is the hypotenuse of a right triangle, in which the sides are the length and the width.

---------------------

The first step before finding the area is finding the length and the width.The ratio of length to width is 4:3, thus, [tex]w = x, l = \frac{4x}{3}[/tex]The diagonal, which is the hypotenuse of a right triangle in which w and l are the sides, is 9.7, and thus, applying the Pythagorean Theorem:

[tex]x^2 + (\frac{4x}{3})^2 = (9.7)^2[/tex]

[tex]x^2 + \frac{16x^2}{9} = 94.09[/tex]

Multiplying everything by 9:

[tex]9x^2 + 16x^2 = 846.81[/tex]

[tex]25x^2 = 846.81[/tex]

[tex]x^2 = \frac{846.81}{25}[/tex]

[tex]x = \sqrt{\frac{846.81}{25}}[/tex]

[tex]x = 5.82[/tex]

---------------------

The width is of [tex]w = 5.82[/tex]The length is of [tex]l = \frac{4}{3}(5.82) = 7.76[/tex]Thus, the area is:

[tex]A = lw = 7.76(5.82) = 45.2[/tex]

The area of the iPad's screen is of 45.2 square inches.

A similar problem is given at https://brainly.com/question/10489198

help me out
help me out
help me out
help me out
help me out

Answers

Answer:

-59049/1048576

Step-by-step explanation:

using indices law you just follow the steps

What is the answer to 15+(-18)=

Answers

Answer:

-3

Step-by-step explanation:

Answer:

-3

Step-by-step explanation:

15+(-18)

15-18

NB: Negative plus positive is negative

-3

Therefore, the answer is -3.

Fulton bus company would charge $500 plus $2.50 per miles that the bus would be driven

Answers

If you’re trying to make an equation out of the given information then the correct answer would be: y=2.50x+500

Two complex numbers are given, where m, n, p, and q are real numbers.

m+ni
p+qi

For what relationship among m, n, p, and q, will be the product of these two complex numbers have only an imaginary part?

This is Algebra 2.
Answer choices:
np mq
mp-np=0
mp+nq=-1

Answers

Answer:

[tex]\displaystyle pm - qn = 0\text{ and } pn + qm \neq 0[/tex]

Or:

[tex]pm = qn \text{ and } pn + qm \neq 0[/tex]

Step-by-step explanation:

We are given two complex numbers:

[tex]\displaystyle m + ni \text{ and } p + qi[/tex]

Where m, n, p, and q are real numbers.

And we want to determine the relationship among m, n, p, and q such that the product of the two complex numbers will only have an imaginary part.

Find the product:

[tex]\displaystyle \begin{aligned} (m+ni)(p+qi) &= p(m+ni) + qi(m+ni) \\ &= (pm + pni) + (qmi + qni^2) \\ &= (pm + pni) + (qmi - qn) \\ &= (pm - qn) + i(pn + qm) \end{aligned}[/tex]

Therefore, for the product to have only an imaginary part, the real part must be zero and the imaginary part must not be zero. That is:

[tex]\displaystyle pm - qn = 0\text{ and } pn + qm \neq 0[/tex]

In conclusion, the relationship between m, n, p, and q is:

[tex]\displaystyle pm - qn = 0\text{ and } pn + qm \neq 0[/tex]

Or:

[tex]pm = qn \text{ and } pn + qm \neq 0[/tex]

(Note: I couldn't understand the provided answer choices, but the above answer is indeed correct (and the second equation can be ignored).)

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