PLEASE HELP WITH MATH

Answer:

the  mean and standard error of the mean are 200 and 2 respectively.

Step-by-step explanation:

Given that ;

the sample size n = 81

population mean μ = 200

standard deviation of the infinite population σ = 18

A population  is the whole set of values, or individuals you are interested in, from an experimental study.

The value of population characteristics such as the  Population mean (μ), standard deviation (σ) are said to be known as the population distribution.

From the given information above;

The sample size is large and hence based on the central limit theorem the mean of all the means is same as the population mean 200.

i.e

[tex]\mu = \bar \mu_x[/tex] = 200

∴ The mean = 200

and the standard error of the mean can be determined via the relation:

[tex]\mathbf{standard \ error \ of \ mean = \dfrac{\sigma}{\sqrt {n}}}[/tex]

[tex]\mathbf{standard \ error \ of \ mean = \dfrac{18}{\sqrt {81}}}[/tex]

[tex]\mathbf{standard \ error \ of \ mean = \dfrac{18}{9}}[/tex]

[tex]\mathbf{standard \ error \ of \ mean =2}[/tex]

Therefore ; the  mean and standard error of the mean are 200 and 2 respectively.

Answer:

Step-by-step explanation:

|x| fails the horizontal line test, so these two functions as presented are NOT inverses of one another.

However, if we look ONLY at x < 0, the functions ARE reciprocals; a horizontal line passes through the graph of |x| only once.

The calculated division of the numbers 600 divided by 5 is 120

From the question, we have the following parameters that can be used in our computation:

600 divided by 5

When represented as an equation, we have

600 divided by 5 = 600/5

Divide 7 by 4

So, we have the following result

600 divided by 5 = 120

Using the above as a guide, we have the following:

the result is 120

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Answer:

x = -8

Step-by-step explanation:

[tex]6x - 3 = -51?\\To - find-x- collect-like-terms.\\6x=-51+3\\6x =-48\\Divide-both-sides-of-the-equation-by-6\\\frac{6x}{6} = \frac{-48}{6} \\x = -8[/tex]

Answer:

15 (x+y)

Step-by-step explanation:

Multiply 6 with inside the parenthesis 6(2x+3y) ➡ 12x + 18y

Multiply 3 with inside the parenthesis 3(x-y) ➡ 3x - 3y

Now add them up

12x + 18y + 3x - 3y = 15x + 15y ➡ 15(x + y)

Answer:

6(2x+3y) + 3(x-y)

12x + 18y + 3x - 3y

15x + 15y

15(x + y)

Step-by-step explanation:

Answer:

285

Step-by-step explanation:

use algebra

third is x

second is 4x

first is 4x-3

x+4x+4x-3

9x-3 = x+x+1+x+2

9x-3=3x+3

12x=6, divide x=2

third is 2, sec is 8, first is 5

Answer:

see below

Step-by-step explanation:

Since AB + BC = AC, x + 3x = 20 → 4x = 20 → x = 5.

AB = x = 5 and BC = 3x = 3 * 5 = 15.

answer is this down below

5

5

15

Answer:

12

Step-by-step explanation:

Take the right side of the box and subtract the left side of the box to get the interquartile range

85 - 73 = 12

Answer:

You can get 6 months

Step-by-step explanation:

Take the gift certificate and divide by the cost per month

30/5 = 6

You can get 6 months

Answer:

6

Step-by-step explanation:

You can compute this by dividing 30 by 5, or in otherwords, by finding the amount of times you can add 5 to get 30.

So 5 + 5 + 5 + 5 + 5 + 5 = 30

and since there are 6 5s, your answer is 6

Answer:

5156

Step-by-step explanation:

Let x represent the initial attendance;

Since the initial attendance dropped by 2%

New attendance = x - 2% of x = x - 0.02x

New attendance = 0.98x

Given;

New attendance = 5053

Equating the values and solving for x;

0.98x = 5053

x = 5053/0.98

x = 5156.12

x = 5156

Initial attendance before the drop = 5156

 [tex]7\frac{1}{2}[/tex] bags of coffee will last for 9 days.

A unit rate means a rate for one of something.

Given that, Ed's Café uses 5/6 of a bag of coffee every day, we need to find the number of days to use [tex]7\frac{1}{2}[/tex] bags of coffee,

Since, in one day it will use = 5/6 bag of coffee

So, 1 bag of coffee will last for 6/5 of the day,

Therefore,

[tex]7\frac{1}{2}[/tex] bags of coffee = 6/5 × 15/2 = 9

Hence,  [tex]7\frac{1}{2}[/tex] bags of coffee will last for 9 days.

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Answer:

Total number of stamps is 600

Number of stamps collected from Europe is 150

Number of stamps collected from America is 200

Step-by-step explanation:

1/3 of stamps collected are from America

1/4 of stamps collected are from Europe

While 250 stamps are from Africa and Asia

Now what this means is that the fraction remaining when we subtract the sum of 1/3 and 1/4 is what is equal to 250

Firstly, let’s say the total stamp is x

Now the fraction of x equal to 250 would be ;

1-1/3-1/4 = 1-(1/3 + 1/4) = 1-(7/12) = 5/12

Now, 5/12 of x = 250

5/12 * x = 250

5x = 12 * 250

5x = 3,000

x = 3,000/5

x = 600 stamps

Thus, the total number of stamps collected is 600

The number collected from America is 1/3 * 600 = 200

The number collected from Europe is 1/4 * 600 = 150

Answer:

87 mins

Step-by-step explanation:

The percentage of pages she read = 100-53= 47%

47%------------41 mins

53% ------------- x

x= (41×53)/47

x= 46.23 mins

nearest minute = 46 mins

Total reading assignments is 41+46= 87 mins

Answer:

87 minutes.

Step-by-step explanation:

to get the percentage of the read part, do 100% - 53% = 47%

41min = 47%

  ?        = 100%

cross multiply;

41 × 100 ÷ 47 = 87.2340...

round off to get 87 min

Answer:

234

Step-by-step explanation:

The consecutive terms of the sequence have a common difference d

d = 17 - 10 = 24 - 17 = 7

This indicates the sequence is arithmetic with n th term

[tex]a_{n}[/tex] = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = 10 and d = 7 , thus

[tex]a_{33}[/tex] = 10 + (32 × 7) = 10 + 224 = 234

I believe the answer is 2/5

Answer:

10m.

Step-by-step explanation:

Add up all the areas of the running path and then you can reach to the answer. I got 10m and most probably it should be that only.

Answer:

B, E

Step-by-step explanation:

[tex]x^{2} +y^{2}=9[/tex]

[tex]\frac{x^{2} }{3^{2}} - \frac{y^{2} }{3^{2}} =1[/tex]

[tex]x^{2} =9-y^{2} \\\frac{x^{2} }{3^{2}} - \frac{y^{2} }{3^{2}} =1[/tex]

[tex]x^{2} =9-y^{2}[/tex]

[tex]\frac{9-y^{2} }{3^{2} } -\frac{y^{2} }{3^{2} }=1[/tex]

[tex]x^{2} =9-y^{2}[/tex]

[tex]\frac{1}{9} * (9-y^{2} )-\frac{y^{2} }{9} = 1[/tex]

[tex]x^{2} =9-y^{2}[/tex]

[tex]1-\frac{2y^{2} }{9} =1[/tex]

[tex]x^{2} =9-y^{2}[/tex]

[tex]-\frac{2y^{2} }{9} =0[/tex]

[tex]x^{2} =9-y^{2}[/tex]

[tex]y^{2} =0[/tex]

[tex]x^{2} =9-y^{2}\\y=0[/tex]

[tex]x^{2} =9\\y=0[/tex]

[tex]x=3 \\y=0\\\\or\\\\x=-3\\y=0[/tex]

Answer: 232 pages

Step-by-step explanation:

Total digits = 588

1 digit page number:

1 to 9 = 1 × 9 = 9

Number of pages = 9/1 = 9

2 - digit page number :

10 - 99 = 2 × 90 = 180

Number of pages = 180/2 = 90

3 - digit page number :

588 - (9 + 180) = 588 - 189 = 399

Number of pages with 3 - digits = 399/3 = 133

Therefore, the total number of pages the book has is :

(9 + 90 + 133) = 232 pages

Answer:

y=-4/3+3 you would multiply the numerator by X

Answer:

( - 2, 1 and 2 / 3 )

Step-by-step explanation:

Check the procedure below;

[tex]y = 2 / 3 * x + 3,\\x = - 2\\\\y = 2 / 3 * ( - 2 ) + 3,\\y = - 4 / 3 + 3,\\y = 5 / 3,\\x = - 2\\\\Conclusion; y = 5 / 3, and, x = - 2[/tex]

To derive this solution, we substituted the known value of x into the top equation, to receive the y value;

Solution - ( - 2, 5 / 3 )

Answer: Mean Score = 50    Range = 31

Step-by-step explanation:

58+76+40+35+46+45+0+100=400

400/8=50

Range = subtract smallest number from largest number

54 - 23 = 31

Answer:

The mass of the chocolate will be between 2.42 ounces and 2.58 ounces, the absolute value inequality is:  [tex]|mass - 2.5| < 0.08[/tex]

Step-by-step explanation:

The ideal mass of the chocolate is 2.5 ounces, although it can vary by 0.08 ounces, this variation can occur for greater masses and lesser ones. Therefore the actual mass of the each chocolate will sit between the ideal mass minus 0.08 and the ideal mass plus 0.08. Therefore we can construct the following inequality:

[tex]-0.08 < mass + 2.58 <0.08\\ |mass - 2.5|< 0.08\\[/tex]

The mass of the chocolate will be between 2.42 ounces and 2.58 ounces, the absolute value inequality is:  [tex]|mass - 2.5| < 0.08[/tex]

Answer: B

Step-by-step explanation:

Should be B because there are no given angles.

The congruence postulate that applies is the SSS postulate

Triangles are known to be similar if the ratio of their sides is the same and they have equal angles

From the given diagram, we can see that the measure of the similar sides of the triangles is the same, hence we can conclude that the triangles are similar to the Side-Side-Side congruence triangle.

Learn more on SSS theorem here: https://brainly.com/question/4163594

Answer:

The answer is B

Step-by-step explanation:

Srry it was so late

Answer:

x = 1 and y = 4

Step-by-step explanation:

5x+2y+2x+6y = 39

7x+8y = 39

Trial and error method:

the answer that satisfies the equation are: x = 1 and y = 4

Hope this helps.

Good Luck

Answer:

(1, 4 )

Step-by-step explanation:

Given the 2 equations

5x + 2y = 13 → (1)

2x + 6y = 26 → (2)

Multiplying (1) by - 3 and adding to (2) will eliminate the term in y

- 15x - 6y = - 39 → (3)

Add (2) and (3) term by term to eliminate y

- 13x = - 13 ( divide both sides by - 13 )

x = 1

Substitute x = 1 into either of the 2 equations and evaluate for y

Substituting into (1)

5(1) + 2y = 13

5 + 2y = 13 ( subtract 5 from both sides )

2y = 8 ( divide both sides by 2 )

y = 4

Solution is (1, 4 )

Answer:9-y

Step-by-step explanation:6-7+3= 9-y

Simplified

Answer:

9-y

Step-by-step explanation:

6-y+3=

6+3-y=

9-y

If you were solving for y, then you need to provide a solution for 6-y+3.

If you were solving for the solution, then you need to give y a value.

If you needed to simplify it, then see my answer.

So the right answer is -74.

please see the attached picture for full solution

Hope it helps

Good luck on your assignment

Answer:

[tex] = ( - 74)[/tex]

Step-by-step explanation:

[tex]2(3 - 5 {(2 + 1)}^{2} + 5) \\ 2(3 - 5(2 + 1)(2 + 1) + 5) \\ 2(3 - 5 \times 3 \times 3 + 5) \\ 2(3 - 15 \times 3 + 5) \\ 2(3 - 45 + 5) \\ 2( - 42 + 5) \\ 2( - 37) \\ 2 \times - 37 \\ = - 74[/tex]

hope this helps

brainliest appreciated

good luck! have a nice day!

Answer:

x = 121°

Step-by-step explanation:

The lower left interior angle of the triangle is adjacent to 115° and are supplementary, thus

interior angle = 180° - 115° = 65°

The angle round a point is 360°

The vertex interior angle = 360° - 304° = 56°

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

x is an exterior angle of the triangle, thus

x = 65° + 56° = 121°

Please see the attached picture for full solution

hope it helps....

Good luck on your assignment.......

Answer:

-5+6-3

Step-by-step explanation:

DUH!!!!!

Answer:  

[(–5) + (–3)] + 6 = –2 and [6 + (–5)] + (–3) = –2

Step-by-step explanation:

DUH!! (as one guy said) this time im right tho.