What are the dimensions of the following matrix

Answer:

Column 1(X)      Column 2(mean - X)

  125                   -13

  137                     -1

  138                     0

  145                     7

  145                     7

Mean = 138

Mean Absolute Deviation : 5.6

Answer:

for all the lazy readers on top the answer is.. B. 5.6:)

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

Answer:

question one is D I think

Answer:

2/21

Step-by-step explanation:

Answer:

3

Step-by-step explanation:

3,3,3,6,7,7

the mode is the number the occurs the most and 3 is there 3 times so it is the mode

Answer:

3

Step-by-step explanation:

Since 3 occurs the most in the set of data, it is the mode.

Mode: The mode is the value that appears most frequently in a data set.

I hope this helps! Have a great day! :)

Answer:

x+y=8

Step-by-step explanation:

x+y=8

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Answer:

a. At the 0.05 level of significance,  there is evidence that the mean life is different from 6,500 hours.

b. The p value= ≈ 0.00480 for z- test which is less than 0.05 and H0 is rejected .

The p value= 0.006913 for t- test which is less than 0.05 and H0 is rejected for 49 degrees of freedom.

c. CI [6583.336 ,6816.336]

d.  The range of CI [6583.336 ,6816.336] tells that the cfls having a different mean life lie in this range.

Step-by-step explanation:

Population mean = u= 6500 hours.

Population standard deviation = σ=500 hours.

Sample size =n= 50

Sample mean =x`=  6,700 hours

Sample standard deviation=s=  600 hours.

Critical values, where P(Z > Z) =∝ and P(t >) =∝

Z(0.10)=1.282  

Z(0.05)=1.645  

Z(0.025)=1.960  

t(0.01)(49)= 1.299

t(0.05)= 1.677  

t(0.025,49)=2.010

Let the null and alternate hypotheses be

H0: u = 6500 against the claim Ha: u ≠ 6500

Applying Z test

Z= x`- u/ s/√n

z= 6700-6500/500/√50

Z= 200/70.7113

z= 2.82=2.82

Applying  t test

t= x`- u /s/√n

t= 6700-6500/600/√50

t= 2.82

a. At the 0.05 level of significance,  there is evidence that the mean life is different from 6,500 hours.

Yes we reject H0  for z- test as it falls in the critical region,at the 0.05 level of significance, z=2.82 > z∝=1.645

For t test  we reject H0   as it falls in the critical region,at the 0.05 level of significance, t=2.82 > t∝=1.677 with n-1 = 50-1 = 49 degrees of freedom.

b. The p value= ≈ 0.00480 for z- test which is less than 0.05 and H0 is rejected .

The p value= 0.006913 for t- test which is less than 0.05 and H0 is rejected for 49 degrees of freedom.

c. The 95 % confidence interval of the population mean life is estimated by

x` ±  z∝/2  (σ/√n )

6700± 1.645 (500/√50)

6700±116.336

6583.336 ,6816.336

d. The range of CI [6583.336 ,6816.336] tells that the cfls having a different mean life lie in this range.

Answer:

157 books in each row

Step-by-step explanation:

24 rows=3768 books

1 row=3768/24 books

=157 books

Therefore,Each row contains 157 books

Mark this answer as brainliest....

=========================================================

Explanation:

There are 7 dimes and 3 pennies, leading to 7+3 = 10 coins total.

The probability of not picking a penny is 7/10. If the first coin is put back, then the probability doesn't change for the second selection.

The probability of getting two dimes is (7/10)*(7/10) = 49/100 when the first coin is replaced.

If the first coin is not replaced, then the answer would be (7/10)*(6/9) = 42/90 = 7/15

Answer:

B is your answer

Step-by-step explanation:

(50.40 + 309.60) divided by 144 = 2.50

Answer:

340.4 in³

Step-by-step explanation:

volume= (½× 8 × 6.9 × 10) + (⅓×½×8×6.9×7)

= 276 + 64.4 = 340.4 in³

Answer:

20 cyclists

Step-by-step explanation:

In 2007 only two bikes are there which mean only 20 cyclists participated and that is the least amount out of all years

Answer:

if each bicycle is ten go by multipls of 10

it's in 2007

and of you count by 10 that's 20

I'd say 13, hope this helps

Step-by-step explanation:

Answer: False

=============================================================

Explanation:

The radical is one step away from being fully isolated. We would apply the rule that [tex]\frac{\sqrt{A}}{\sqrt{B}} = \sqrt{\frac{A}{B}}[/tex]

In this case,

[tex]\frac{\sqrt{x+3}}{\sqrt{x-1}} = \sqrt{\frac{x+3}{x-1}}[/tex]

Meaning that the equation

[tex]\frac{\sqrt{x+3}}{\sqrt{x-1}} =3[/tex]

is the same as

[tex]\sqrt{\frac{x+3}{x-1}} = 3[/tex]

From here, we square both sides and use algebra to isolate x.

Answer:

gradient m = 3

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the gradient and c the y- intercept )

y = 3x - 5 ← is in slope- intercept form

with gradient m = 3

Answer:

[tex]\implies\boxed{\rm \red{ Slope (m)= 3 }}[/tex]

Step-by-step explanation:

Given :-

And we need to find out the gradient of the line . Gradient of line is nothing but the slope of the line . The given equation is in slope intercept form , so we can find out the slope by comparing .

Slope Intercept form :-

[tex]\rm\implies y = mx + c [/tex]

Given equation :-

[tex]\rm\implies y = 3x - 5 [/tex]

On comparing :-

[tex]\implies\boxed{\rm \red{ Slope (m)= 3 }}[/tex]

Hence the slope of the line is 3 .

I calculated this myself, and I got the answer 3/4, but I'm trash at explaining long problems. So here is what I found to help explain it. It's not a link.

"If (p, r) lies on the line y = x + b, then

r = p + b…. (1)

If (2p, 5r) lies on the line y = 2x + b, then

5r = 2(2p) + b

or 5r = 4p + b…. (2)

Subtracting equation (1) from (2), we get

5r - r = 4p + b - p - b

4r = 3p or r/p = 3/4"

Since I don't believe in plagiarism here's the person who is a life saver at explaining things.

(Mohammad Faizan)

PS. I really did try to explain it myself, only to give myself a headache, so please don't be mad and report me. I only wanted to help.

Answer:

a

Step-by-step explanation:

Answer:

60:90

Step-by-step explanation:

The ratio of girls (G) to boys (B) is 2 : 3.

Given the following data:

In this exercise, you're required to find the ratio of girls (G) to boys (B). In order to do this, we would divide the two values to the least.

[tex]G : B = 60 : 90[/tex]

Dividing both sides by 30, we have;

[tex]G : B = \frac{60}{30} : \frac{90}{30} \\\\G : B = 2 : 3[/tex]

Therefore, the ratio of girls (G) to boys (B) is 2 : 3.

Read more: https://brainly.com/question/12212308

Answer:

625 unit²

Step-by-step explanation:

Surface area of a rectangular pyramid :

Area of base * 4(area of triangular side)

Area of base = length * width

Area of base = 15 * 15 = 225

Height of triangular side = 15

Area of triangle = 1/2 * base * height

Area of triangle = 1/2 *15 * 15 = 112.5 unit²

Surface area = 225 + 4(112.5)

Surface Area = 225 + 450

Surface Area = 625 unit²

Answer:

Letter a)

Step-by-step explanation:

quizlet

Answer:

the second company

Step-by-step explanation:

the second company produces 50,000 more crackers an hour than the first company

Answer:

6. peach , plum, crab apple

7. pepper tree, common apple, pear

8. because the graph is lowered And that the boxes are needed to go higher to get to the other numbers and the graph is misleading and etc.

9. black cherry, magnolia, live oak, sweet cherry.

10.because the graph is lowered And that the boxes are needed to go higher ot get to the other numbers and the graph is misleading

Step-by-step explanation:

I don't really understand 8 and 10 so this all i got

Answer:

[tex]total \: balloons = (50 \times 7) \\ = 350 \: balloons \\ none \: yellow \: balloons = 350 - 40 \\ = 310 \: none \: yellow \: balloons[/tex]

Answer:

310

Step-by-step explanation:

The equation that we would use to solve this problem is 7 × 50 - 40 = b

(b is the number of non-yellow balloons)

Since Aaron bought 7 packs of balloons with 50 balloons in each pack, we would need to multiply 7 and 50 to find the total amount of balloons that he bought.

7 × 50 = 350.

Now we subtract 40 (the total number of yellow balloons) from 350 (the total number of balloons), to find the amount of balloons that are not yellow.

350 - 40 = 310

Answer:

21

Step-by-step explanation:

Add 5.3 + 1.7 and you get 7 (7 is the base of the triangle). Multiply 7 by the height (6) and you get 42. When you put 2 triangles together, it will create a quadrilateral. "Cut the quadrilateral in half" and you will get your triangle's area. The area is 21 :)

Answer:

53.9 square units was my answer, but I learned that it was 21 !

Answer:

A = 12

Step-by-step explanation:

First you need to get the length from the perimeter, the formula is l= p/2 - w

After using the formula, you would get 6 for length. The formula for the area of a rectangle is a = lw, so you would multiply 6 and 2 which would give you 12 as your answer.

I apologize if I made any grammar mistakes or if it is unclear.

Answer:

I got area is 12 too

Step-by-step explanation:

2x2=4 because 2 widths

16-4 to find the 2 lengths added up

12÷2 to find the length

6x2=12 because length times width

Answer:

5 x 2 -3 = 7

Step-by-step explanation:

i mean.... thats all

Answer:

12

Step-by-step explanation:

if x equals to 6 than

6+6=12

Answer:

A satellite is a moon, planet or machine that orbits a planet or star. ... Usually, the word "satellite" refers to a machine that is launched into space and moves around Earth or another body in space. Earth and the moon are examples of natural satellites. Thousands of artificial, or man-made, satellites orbit Earth.

Step-by-step explanation:

Answer:

Right angle 90 degrees is always going to be a right angle.

Step-by-step explanation:

Answer:

Hello! answer: 3/4

Step-by-step explanation:

9 ÷ 3 = 3 12 ÷ 3 = 4 then that is 3/4 and we can't reduce any further therefore 3/4 is the answer HOPE THAT HELPS

Answer:

20x+4

Step-by-step explanation:

4×5x=20x (Because 4×5 is 20 and just ignore the "x" for now)

4×1=4