HELPPP. 6th GRADE MATH!!! ITS EASY IF YOU ARE GOOD AT IT!!!
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Answer:

H0 : σ² = 10

H1 : σ² ≠ 10

X² = 20.124

Pvalue = 0.064776

there is significant evidence to conclude that the rebound lengtb of rockfall down a slope is not 10m²

Step-by-step explanation:

Given the data:

10.94 13.71 11.38 7.26 17.83 11.92 11.87 5.44 13.35 4.90 5.85 5.10 6.77

Using a calculator ;

The sample variance, s² = 16.77

α = 0.10

The null and alternative hypothesis :

H0 : σ² = 10

H1 : σ² ≠ 10

The test statistic :

X² = [(n - 1)*s² ÷ σ²]

s² = 16.77

n = sample size = 13 ; s²

X² = [(13 -1)*16.77 ÷ 10

X² = (12 * 16.77) / 10

X² = 201.24 / 10

X² = 20.124

The Pvalue using a Pvalue calculator ; degree of freedom (df) = 13 - 1 = 12

Pvalue = 0.064776

Pvalue < α ; Hence we reject the null

Hence, there is significant evidence to conclude that the rebound lengtb of rockfall down a slope is not 10m²

Answer:

313.6

Step-by-step explanation:

24 1/2 * 12 4/5 = 1568/5 = 313 3/5

= 313.6

Hope I helped (p.s. maybe brainliest?)

Answer:

24 1/2 ÷ 12 4/5 = 1 117/128

Step-by-step explanation:

:))

Answer:

3. 224 cm3

4. 35 cm3

5. 60 cm3

Step-by-step explanation:

To find the volume you need to multiple the base times the height times the length.

Answer:

12 years old

Step-by-step explanation:

7 + 5 = 12

T + 5

Answer:

I do not know the Answer I'm just trying to get my point

Step-by-step explanation:

Thank you

Thank you

Answer:

7 f + 5 ??

Step-by-step explanation:

Answer:

Steps:

x = √(15²-10²)

x = √(225-100)

x = √125

x ≈ 11.180

Answer:

Step-by-step explanation:

2/10

Answer:

what are you asking exaclty ???

Step-by-step explanation:

Answer:

8 plantains

Step-by-step explanation:

48=$24

x=. $4

192=24x , x= 192÷24= 8

Answer:

8 plantains

Step-by-step explanation:

Cost and number of plantains are in proportion

Number of plantains that can be bought for $ 4 be 'x'

48 : 24 :: x : 4

Product of means = product of extremes

24 * x = 48*4

       [tex]x = \frac{48*4}{24}[/tex]

      x = 2 * 4

      x = 8

Answer:

18.75 is the new price

Answer:

Step-by-step explanation:

It would be 2.43ft cubed. You first have to multiply 6 x 9 to get 54 and then Do 54 x 4.5 to get 243 ft cubed. Next you have to put it in fraction form 243/100. After that you have to divide 243 by hundred( you can do this by moving the decimal place two places to the left) and you get the answer 2.43 ft cubed

Answer:

x = 0 , 5

Step-by-step explanation:

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

Cross multiply,

2x* ( x - 2) = 3x *(x - 3)

2x*x - 2*2x  = x*3x - 3*3x

2x² - 4x   = 3x² - 9x

subtract 2x² from both sides

-4x = 3x² - 2x² - 9x           {Combine like terms}

-4x = x² - 9x

Add 9x to both sides

-4x+ 9x = x²

x² = 5x

x² - 5x = 0

x(x - 5) = 0

x = 0  ; x - 5 = 0

                 x = 5

Answer:

0,5

Step-by-step explanation:

took test, person who put question up was correct

Answer:

The surface area of a square pyramid is the sum of the areas of all its 4 triangular side faces with the base area of the square pyramid. If a, h, and l are the base length, the height of the pyramid, and slant height respectively, then the surface area of the square pyramid = a2+ 2al (or) a2+2a √a24+h2 a 2 4 + h 2 .

Step-by-step explanation:

Answer:

hey dude, sorry if this is wrong but i think its 6cm

Step-by-step explanation:

Answer:

80

hope this is correct

comment below

hope this helps you ☺️☺️

Answer:

Height = 2545.45cm

Step-by-step explanation:

Volume of cylinder = pie r^2 h

500 = 22/7*4*4*h

500*7/22*16 = h

2545.45cm = h

Answer:

pythagoras theorem

Step-by-step explanation:

Pythagoras theorem states that “In a right-angled triangle, the square of the hypotenuse side is equal to the sum of squares of the other two sides“.

9514 1404 393

Answer:

  5/2 = 2.5

Step-by-step explanation:

The slope is given by ...

  m = (y2 -y1)/(x2 -x1)

Using the first two lines in the table, this is ...

  m = (10 -5)/(2 -0) = 5/2

The slope of the line is 5/2.

__

As a decimal, that is 2.5.

Answer:

Step-by-step explanation:

Problem 2: In the AC circuit shown below, if Iz = 2ejoº A, perform the following: (a) Solve for all the other unknown voltage differences and currents indicated on the circuit. (b) Find the total impedance seen by the source. (c) Calculate the power factor of the whole circuit. (d) Evaluate the total time-average power dissipation. Useful Formulas: 7=0.5V, Palme Xpower factor = 0.5 Re(VI")=0.52. Re(z) V VA 4 HI 2 Ω -j2 Ω 112 113 +-j412 -000 j4 Ω

Answer:

4.32×10^5

first calculate the left side and the calculate the right side.

finaly substract the result you get when you calculate at the first the result is 4.32 ×10^5

Answer:

14

Step-by-step explanation:

365*40=14600*60 minutes = 14 miles per hour

Answer:

A. 12 ft², 16 ft², and 20 ft²

Step-by-step explanation:

Answer:

It is 72

Step-by-step explanation:

Hope it helps

Answer:

72

Step-by-step explanation:

It was very easy question.

Answer:

The number is 4

Step-by-step explanation:

Let the number  = 'x'

Reciprocal of 'x' = 1/x

Reciprocal of 2 = 1/2

8 times the reciprocal of 'x' = [tex]8*\frac{1}{x}\\[/tex]

[tex]8*\frac{1}{x}= 4* \frac{1}{2}\\\\8*\frac{1}{x}= 2\\[/tex]

Now multiply both sides by x

[tex]8*\frac{1}{x}*x = 2*x\\\\8 = 2x[/tex]

Now divide both sides by 2

[tex]\frac{8}{2}=\frac{2x}{2}\\\\4 = x[/tex]

x = 4

Answer:

my answer is negative 14/3.

Step-by-step explanation:

choice A hope that helps you if I'm wrong please tell me the right answer right away I can try another method.

Answer:

Generally, the algebraic expression should be any one of the forms such as addition, subtraction, multiplication and division. To find the value of x, bring the variable to the left side and bring all the remaining values to the right side. Simplify the values to find the result.

Step-by-step explanation:

Answer:

Step-by-step explanation:

80

Answer:

Step-by-step explanation:

E : -5 , -3

F:    2 , -7

Distance = sqrt(  ( 2 -(-5)) * ( 2 -(-5)) + (-7 -( -3)) *(-7 -( -3))  )= sqrt ( 49 + 16 ) = sqrt (65)