Systematic random sampling has become a popular method of drawing samples in research practices because _____.

The largest value of n such that the statement "at least n people in this room have birthdays falling in the same month" is always true is 5

From the given information, we have 52 people in the room

Note that there are 12 months in a year

Let's divide the number by people by the months of the year

⇒ [tex]\frac{52}{12}[/tex]

⇒ 4 remaining 4

If 48 people are evenly distributed over twelve months, then there will be four people born in each month.

The remaining four people can be placed each in any of the twelve different months.

Hence, if 52 people are evenly distributed as possible, there will be eight months with four people and four months with five people.

Thus, the largest value of n such that the statement "at least n people in this room have birthdays falling in the same month" is always true is 5

Learn more about word problems here:

https://brainly.com/question/836348

#SPJ1

Answer:

[tex]-\frac{61}{14}[/tex]

Step-by-step explanation:

Question: 5 - 7(z+1) = 7(-9-3z)

We multiply the number in front of the bracket first, since that is multiplication.

--> 5 -7z -7 = -63 - 21z

--> -7z -2 = -63 - 21z

Now, we move all the z and all the numbers to each side.

--> -7z +21z = -63 +2

--> 14z = -61

--> z = -61/14

This cannot be simplified further, so z is -61/14.

Yes, (3, -2) is a solution for the linear system y = 2x - 8 and 2x + 4y = -2

In mathematics, the theory of linear systems is the foundation and core part of linear algebra, a subject that is used in most parts of modern mathematics. When the number of equations is the same as the number of variables, there is likely to be a solution. Not guaranteed, but likely.

If there is no solution, the equations are called "inconsistent".

One or infinitely many solutions are called "consistent"

In mathematics, a system of linear equations is a set of one or more linear equations involving the same variables

We need to find whether (3, -2) is a solution for the linear system y = 2x - 8 and 2x + 4y = -2 or not

Let y = 2x - 8.......(1)

From equation (1) we get, y - 2x = -8.....(2)

2x + 4y = -2.........(3)

Put (3,-2) in equation (2) , we get

-2 - 2(3) = -2 -6 = -8

LHS = RHS

Put (3,-2) in equation (3) , we get

2(3) + 4(-2) = 6 - 8 = -2

LHS = RHS

Hence,(3, -2) is a solution for the linear system y = 2x - 8 and 2x + 4y = -2

Learn more about linear system here:

https://brainly.com/question/28052760

#SPJ4

Answer: 2

Step-by-step explanation:

[tex]\frac{-2-14}{2-10}=\frac{-16}{-8}=\boxed{2}[/tex]

Answer:

2.5

Step-by-step explanation:

IVE BEEN WATCHING YOUR ACCOUNT STOP STEALING POINTS OR YOUR ACCOUNT WILL BE TERMINATED.

Step-by-step explanation:

Between 48% and 54% believe that their health is extremely important.

According to the statement

Given that a random sample of 1001 Americans aged 18-24 years showed that 51% believe their health is extremely important.

Here

Sample size n =1001

sample proportion p = 0.51

By these values we calculate the Standard error of proportion.

So, Standard error of proportion = 0.0158.

Since sample size is sufficiently large we can take Z critical value for confidence interval

Z critical value for 95% = 1.96

Margin of error = ±1.96*std error

= ±0.0310

confidence interval = 0.51 ±0.0310

= (0.48, 0.54)

So, Between 48% and 54% believe that their health is extremely important.

Learn more about PROPORTION here https://brainly.com/question/870035

#SPJ4

Answer:

B

hope this helps :)

Answer:

D

Step-by-step explanation:

to find the zeros, equate f(x) to zero, that is

(x - 7)(x + 8) = 0

equate each factor to zero and solve for x

x - 7 = 0 ⇒ x = 7

x + 8 = 0 ⇒ x = - 8

Step-by-step explanation:

asleep percentage :- ( 8h /24h ) 100 % = 33.33%

awake percentage :- ( 16h / 24h ) 100 % = 66.67%

The completion of the tabs are:

You may calculate how many percentage points your findings will deviate from the actual population figure by using something called a margin of error.

In conclusion

In conclusion,

Read more about the margin of error.

https://brainly.com/question/10501147

#SPJ1

88e interprets the total cost for all the economy class seats, as all seats are sold, where 88 is the number of economy class seats and e dollars is the cost of each economy class seat.

In the question, we are given an equation, C = 24f + 88e, and are informed that the cost, C, in dollars from an airplane flight given that the average cost of a first class seat is f dollars and the average cost of an economy seat is e dollars is given by the equation above if all seats are sold.

We are asked for the interpretation about the 88e as shown in the equation.

The equation given to us is a cost equation.

A cost equation comprises of two parts:

In the given equation, we have two types of quantities:

Thus, both these quantities must be having a per unit price, multiplied by the number of units sold.

Now, we are informed that e dollars is the per unit price for an economy class seat.

Thus, 88e interprets the total cost for all the economy class seats, as all seats are sold, where 88 is the number of economy class seats and e dollars is the cost of each economy class seat.

Learn more about cost equation at

https://brainly.com/question/25109150

#SPJ4

For complete question, refer to the attachment.

Answer:

[tex]400m^3[/tex]

Step-by-step explanation:

Use the formula [tex]V=\frac{1}{3}Ah[/tex]

Where h=the height of the pyramid (12cm)

A=the base area of the pyramid, also known as the area of the square (10cm*10cm=100cm)

So, inserting this into the equation:

[tex]V=\frac{1}{3} (100)(12)[/tex]

[tex]V=\frac{1}{3} (1200)[/tex]

[tex]V=400m^3[/tex]

Answer:

x = 90°

Step-by-step explanation:

The line that contains angle x and the 90° angle is a straight line.

A straight line measures as 180°.

So, subtracting the given 90° from the 180° line that the two angles share, we would get the measure of x.

[tex]180-90 =x[/tex]

Which means, [tex]x=90[/tex].

So the value of x is 90°.

Answer:

18a-8b

Step-by-step explanation:

i think this right but i think u messed up putting an equal sign instead of a subtraction.

Answer:

where is the table?

Step-by-step explanation:

Answer:

268.08 (268)

Step-by-step explanation:

The volume of a sphere is 4/3*pie*r^3

Answer:

Step-by-step explanation:

419-79= 340 assignments left to do

340/7days=48.57..... or about 46 assignments a day to finish them all in a week

(1 week= 7 days)

I don't know if you were serious but good luck with all the work if you are

Answer:

47 on 6 days and 48 on 1 day.

Step-by-step explanation:

Firstly you need to subtract 79 from 419. You will have 330 assignments left and the divide 330 by 7 since there are 7 days in a week and you get 47.142 and so if you double check by multiplying 47 times 7 it gives 329 so then you get 47 on 6 days and 48 on 1 day. Hope this helps!

Answer:

90 approximately because if AB is 80 then DC should be 90 because AB come before DC in letters

Answer:

112.6 degrees and 105 feet.

Step-by-step explanation:

took the assignment

The percentage that the number of airlines with an average airplane age of 14 is less than the number of airlines with an average airplane age of 11 is:

B. 20%.

The percentage of an amount a over a total amount b is given by a multiplied by 100% and divided by b, that is:

[tex]P = \frac{a}{b} \times 100\%[/tex]

The percentage of airlines with an average age of 14 years is:

[tex]P = \frac{2}{15} \times 100\% = 13.33\%[/tex]

The percentage of airlines with an average age of 11 years is:

[tex]P = \frac{5}{15} \times 100\% = 33.33\%[/tex]

The difference is:

33.33% - 13.33% = 20%.

Hence option B is correct.

More can be learned about percentages at https://brainly.com/question/10491646

#SPJ1

Answer:

23.53

Step-by-step explanation:

OK so we got sin 52°=0.8 and the cos 52°=0.6

but we need tan 52° because we don't want to spend our time on calculating hypothenuse so

[tex] \frac{ \sin(52) }{ \cos(52) } = 1.3 = \tan(52) [/tex]

so

[tex]1.3 = \frac{x}{18.1} = = = > x = 23.53[/tex]

The rate of change of stamp collection was $57.5 per year.

Rate is comparison of two related quantities.

Often the second quantity is time (per second, per hour, etc) but it can be anything.

Can be in the style "this per that" or as a single number calculated using division.

Example: Sam makes 3 pancakes every 6 minutes, that is a rate of:

• 3 pancakes per 6 minutes

• 0.5 pancakes per minute

• 30 pancakes per hour

• an hourly rate of 30

By formula the rate of change = Change in cost/ Time taken

=( $980 - $420)/ 8years

= $460/ 8 years

= $57.5 per year

Thus the rate of change of stamp collection was $57.5 per year.

Learn more about rate here :

https://brainly.com/question/12786410

#SPJ4

The ratio of the geometric sequence 40[tex]2^{n-1}[/tex] is 2.

Given that geometric sequence is 40*[tex]2^{n-1}[/tex] and we have to find the common ratio of all the terms.

Geometric sequence is a sequence in which all the terms have a common ratio.

Nth termof a GP is a[tex]r^{n-1}[/tex] in which a is first term and r is common ratio.

Geometric sequence=40*[tex]2^{n-1}[/tex]

We have to first find the first term, second term and third term of a geometric progression.

First term=40*[tex]2^{1-1}[/tex]

=40*[tex]2^{0}[/tex]

=40*1

=40

Second term=40*[tex]2^{2-1}[/tex]

=40*[tex]2^{1}[/tex]

=40*2

=80

Third term=40*[tex]2^{3-1}[/tex]

=40*[tex]2^{2}[/tex]

=40*4

=160

Ratio of first two terms=80/40=2

Ratio of next two terms=160/80=2

Hence the common ratio of geometric sequence is 2.

Learn more about geometric progression at https://brainly.com/question/12006112

#SPJ1

The permutations is computed below.

1. Evaluate 9P4

9P4 = 9!/(9 - 4)

= 9!/5!

= (9 × 8 × 7 × 6)

= 3024

2. How many ways can 5 students sit on a row of 15 chairs for a photograph?

= 15!(15 - 5)

= 15!/10!

= (15 × 14 × 13 × 12 × 11)

= 360360

Learn more about permutations on:

brainly.com/question/28062699

#SPJ1

(a) The value of the unknown length, a, is 18 cm
(b) The value of the unknown angle measurement, θ, is 39°

From the question, we are to determine the unknown length and angle measurement

(a)

A + B + C = 180° (Sum of angles in a triangle)

A = 180° - (B + C)

A = 180° -(68° + 59°)

A = 53°

Using the law of sines

[tex]\frac{a}{sin A}=\frac{c}{sin C}[/tex]

[tex]\frac{a}{sin 53^\circ}=\frac{19.5}{sin 59^\circ}[/tex]
[tex]a=\frac{19.5 \times sin 53^\circ}{sin 59^\circ}[/tex]

[tex]a= 18.168[/tex]

[tex]a \approx 18 cm[/tex]

(b)

[tex]\frac{sin A}{a}=\frac{sin B}{b}[/tex]

[tex]\frac{sin \theta}{15}=\frac{sin 57^\circ}{20}[/tex]

[tex]sin \theta=\frac{15 \times sin 57^\circ}{20}[/tex]

[tex]sin \theta=0.6290[/tex]

[tex]\theta=sin ^{-1} (0.6290)[/tex]

[tex]\theta=38.976 ^\circ[/tex]

[tex]\theta \approx 39^\circ[/tex]

Hence, the value of the unknown length, a, is 18 cm
The value of the unknown angle measurement, θ, is 39°

Learn more on Law of sines here: https://brainly.com/question/17021875

#SPJ1

Answer:

27

Step-by-step explanation:

(3^−9)(3^6)(3^6)

=1/19683(3^6)(3^6)

=1/19683(3^6)(3^6)

=(1/19683(729))(3^6)

=1/27(3^6)

=1/27(729)

=27

Answer:

27^3

Step-by-step explanation:

Answer:

false

Step-by-step explanation:

X is equal to Y

therefore,

X = Y

X= false

Y = false

so,

false = false

Answer:

(C)=22.5

Step-by-step explanation:

Hi! ❄

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

First, let's subtract by 23 both sides.

[tex]\sf{\dfrac{3}{2}c=15}[/tex]

Now we multiply the equation by 2.

[tex]\sf{3c=30}[/tex]. See how on the left hand side, the 3/2c*2 turned into 3c? That's because multiplication and division are operations that undo each other.

And Now we just divide by 3 both sides.

[tex]\sf{c=10}[/tex]

Hope this made sense !!

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

[tex]\star\tiny\pmb{calligraphy}\star[/tex]

There are 24 ways in which 5 guys can sit if arranged from oldest to youngest.

We have,

Five guys.

Now,

We know that,

Total number of ways to arranged around a table (n) = (n-1)!

So,

For n = 5,

I.e.

(n - 1)! = (5 - 1)! = 4!

So,

Total number of ways to arranged Five guys rom oldest to youngest (n) = (n-1)!

i.e.

= (5 - 1)! = 4!

We get,

= 4 × 3 × 2 × 1

i.e.

Total number of ways to arranged Five guys rom oldest to youngest (n) = 24.

Hence we can say that there are 24 ways in which 5 guys can sit if arranged from oldest to youngest.

Learn more about arrangement here

https://brainly.com/question/15032503

#SPJ4

The volume of the frozen figure is 736 cm³

From the question, we are to determine the volume of the frozen figure

In the given diagram,

The volume of the frozen figure = a³ + 1/2(a²b)

From the given information,

a = 8 cm

b = 7 cm

∴ Volume of the frozen figure = 8³ + 1/2(8² ×7)

Volume of the frozen figure = 512 + 1/2(448)

Volume of the frozen figure = 512 + 224

Volume of the frozen figure = 736 cm³

Hence, the volume of the frozen figure is 736 cm³

Learn more on Calculating volume of a prism here: https://brainly.com/question/13175744

#SPJ1

Answer: 27

Step-by-step explanation:

Mean = Sum of data/Number of data = (2 + 7 + x)/3 = 12

(x+9)/3 = 12

x+9 = 36

x = 27