A teacher would like to estimate the percentage of her students who play chess.

Which method should the teacher use to select the sample?


A. select all students who are currently in the chess club

B. use a computer to randomly select 30 student IDs from all her students

C. use a computer to randomly select 30 student IDs from all students

D. select every other student in her classes until she has selected a total of 30 students

Answers

Answer 1

Answer:

D

Step-by-step explanation:

because it's normal reasonal if it is wrong i will look for a better answer

Answer 2

Answer:

A. select all students who are currently in the chess club

Step-by-step explanation:

If the teacher randomly selects students, there is a greater chance that many don't play chess. But, if the teacher selects all the students who are currently in the chess club, most likely all of them play chess because they are in the chess club.


Related Questions

Twelve movie tickets cost $84. How much does a single movie ticket cost?

Answers

Answer:

The answer would be 7 dollars.

Step-by-step explanation:

Hope this helps!

Answer:

$7

Step-by-step explanation:

84 divided by 12 is 7 so it would be 7 dollars

what’s the answer to this?

X/3+1 = 6

Answers

Answer: x=15

Step-by-step explanation:

x/3+1= 6

Step 1: Subtract 1 from both sides (always do inverse operations with the number, not the x term(s))

x/3 + 1-1 = 6-1

x/3= 5

Step 2: Now we need to isolate x (get it on its own). To do this, we must move the 3 to the other side, which we will do by multiplying the 3 and the 5 (as since the 3 was used for divisision, its inverse operation is multiplication).

x/3 = 5

x = 5x3

x= 15

Step 3: Check by using PITA, or "Plugging In the Answers"

We came to the conclusion that x=15. Now, we can "plug in", or substitute the x in the equation for 15:

x/3 + 1= 6

15/3 + 1= 6

5+ 1= 6

6=6

Correct ✔️

Answer:

X = 24

Step-by-step explanation:

3 + 1 = 4

X/4 = 6

Multiply both sides by 4

X = 24

solve the inequality
1/5x+3>9

Answers

Answer:

Step-by-step explanation:
First, you would want to subtract the 3 on the left side to the right side to get the 1/5x to be alone.
1/5x>6
Next, we need to solve for x, by multiplying 5 to cancel out the 1/5.
(5)1/5x>6(5)
That leaves us with x>30
treat the inequality sign as an equal sign, that should help

its gonna be x>30 because x+15>45 then u subtract .

Plis help with this problem! (Screenshot attached)

"Find the surface area of each pyramid. Round to the nearest tenth if necessary."

Answers

Answer: The total surface area is 633.9

Step-by-step explanation:

12.25 times 15.75, then divide by 2 = 96.46875 (this is the area of the triangle

Then times 4 = 385.875 (Because there are four triangles

15.75 times 15.75 = 248.0625 (The area of the square)

The sum is 633.9375

Rounded = 633.9

yes because when u ok so he said yes would go

How to solve this? WILL GIVE BRAINLIEST

Answers

8x-10=6x
8x-6x=10
2x=10
X/2 10/2 = x=5
X=5 that will be your answer

The table shows the cost of hiring a plumber for the first 3 hours of a job.

Which graph shows the points in this table?


Ps: sorry there are too many screen shots.

Answers

Answer: it's A

Step-by-step explanation:

since the cost for hiring a plumber for three hours costs $120 so in graph A the graph has more likely stopped at $120 on the y axis which can be said as the cost axis too. I'm pretty sure the answer is A!

A
The cost of working is$150

turn this fraction into a decimal 3 3/8

Answers


The answer for this equation would be 3.375

Answer:

3.375

Step-by-step explanation:

divide 3/8 and you get 0.375 then add 3 and you get 3.375

A prism has a length of 4 centimeters, width of 2 centimeters, and height of 10 centimeters. Use the prism to complete the statements. The surface area of the prism is cm2. The volume of the prism is cm3.

Answers

Answer:

Surface area = 136 cm²    Volume = 80cm³

Step-by-step explanation:

Surface Area = face 1 + face 2 + face 3 + face 4+ face 5 + face 6

SA = 2(4) + 2(4) + 2(10) + 2(10) + 4(10) + 4(10)

SA = 8 + 8 + 20 + 20 + 40 + 40

SA = 16 + 40 + 80

SA = 136

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

Volume = l*w*h

Volume = 4*2*10

Volume = 8*10

Volume = 80

Answer:

4

Step-by-step explanation:

*

PLS HELP WILL GIVE BRANLIEST: The angle measurements in the diagram are represented by the following expressions. ∠A=5x-5 ∠B=3x+13
solve for x then find the measurement for ∠B

Answers

Answer: x = 9

Angle B = 40

Step-by-step explanation:

5x-5 = 3x+13 Those angles are the same, they are corresponding angles

5x = 3x + 18 Solve the equation

2x = 18

x = 9


3(9)+13 Solve it

Angle B = 40


Hope this helps.

I think the answer is x=9 and angle B=40

A warehouse holds 94,896 bottles of water. There are the same number of bottles in each
aisle. How many aisles could there be?
Select all the possible numbers.
4
8
9
2
Submit

Answers

there are 3 answers which are 4 8 and 2
They have 3 answers 2 , 4 and 8

Find the surface are of this figure

Answers

Answer:

If I am correct, I think the surface area is 448.

Step-by-step explanation:

First start by finding the area of all the sides

Front side. 12 x 10 = 120

2 triangle sides: 8 x 10 = 80, 80 x 2 = 160

Bottom side: 6 x 12 = 72

Back side: 8 x 12 = 96

Then add up the surface area

120 + 160 + 72 + 96 = 448

Btw I don't know if I am correct, but I think this is the way you find surface area.

the surface of this figure is 448

9-2x=-8-4x Its for math

Answers

Answer:

x=-8.5

Step-by-step explanation:

Combine like terms:

9+8=-4x+2x

Solve:

17=-2x

Divide:

17/-2=x

-8.5=x

Hope this Helps!

Answer:

your answer is x=-8.5

Step-by-step explanation:

HELP MEEEE!!!!!!!!!!!!!!!!!

Answers

The answer is D.

9*(8+4)/4=27
The Answer would be D.27

Which figure is a trapezoid?

A 4-sided shape with 2 parallel sides.
A 4-sided shape with 4 parallel sides.
A 4-sided shape with 4 parallel sides.
A 5-sided shape with 2 parallel sides.

Answers

Answer:

none of those

Step-by-step explanation:

A trapezoid is a 4-sided shape with 1 parallel side

Could you pls choose this as brainliest???!!!

The answer would be a four sided shape with one set of parallel sides. Parallel sides are two sides that will never touch or intersect. To further explain, if we take the left and right sides of the trapezoids and extend them, they will eventually intersect meaning that they aren’t parallel. This will go for and trapezoid, no matter the side lengths. However, if we take the top and bottom sides of a trapezoid and extend them left and right, we will find that they will never intersect which is how we know that a trapezoid only has one pair of parallel sides.

one step equation Y/1.8=80 what’s the answer?? ( with steps )

Answers

Answer:

5) Y = 144

Step-by-step explanation:

[tex]\frac{Y}{1.8} = 80[/tex]

Bring 1.8 from the numerator to the denominator and change the sign from divide to multiply. Also, the 1.8 switches sides so the equation looks like:

Y = 80*1.8

Y = 144

Hence, Y is equal to 144.

Hope this helps!!!

Please mark me as brainliest!!!

Y / 1.8 = 80
X1.8 X1.8
Y = 144


Not entirely sure if this is correct

Triangles A and B have vertical heights x cm and (x+3) cm respectively. The areas of Triangles A and B are 30cm² and 32cm² respectively. (a) Find, in terms of x, an expression for the base of: (i) Triangle A (ii) Triangle B (b) Given that the base of Triangle B is 4 cm less than the base of Triangle A, form an equation and show that it reduces to x² + 4x - 25 = 0 (c) Solve the equation and hence, find the height of Triangle B.​

Answers

Answer:

Hi,

Step-by-step explanation:

Let say a the base of the triangle A and b the base of the triangle B.

[tex]a)\\\left\{\begin{array}{ccc}\dfrac{a*x}{2}&=&30\\\dfrac{b*(x+3)}{2}&=&32\\b=a-4\\\end{arraqy}\right.\\\\(i): a=\dfrac{60}{x}\\\\(ii): b=\dfrac{64}{x+3}\\\\b)\\\dfrac{64}{x+3}=\dfrac{60}{x}-4\\\\64x=(60-4x)*(x+3)\\\\4x^2+16x-180=0\\\\x^2+4x-45=0\\\\\Delta=16+4*45=196=14^2\\x=\dfrac{-4+14}{2}=5\ or\ x=\dfrac{-4-14}{2}=-9\ (impossible)\\So\ x=5,\ a=\dfrac{60}{5}=12, b=\dfrac{64}{5+3}=8\\\\Area\ of\ A=12*5/2=30\\Area\ of\ B=8*8/2=32\\\\Height\ of\ triangle\ B=x+3=5+3=8.\\[/tex]

It should equal to eight.

Find the solution to:
y=0.5+1
y=2x-2

Answers

The answer is A because once you plug them in the equation the answers will be the same
A should be the answer

Can someone answer this

Answers

Answer:

2÷1 =2

2x1 =2

2-1 = 1

Step-by-step explanation:

Hopw this helps

2 divided by 1 = 2
2 X 1 = 2
2 - 1 = 1

What is the area of this figure?

_______ square kilometers

Answers

Answer:

90 square kilometers

Step-by-step explanation:

1. split the figure in small definite sections

2. find the areas of the smaller sections.

3. find the sum of the areas.

Answer : 90
Step-by-step explaining
Split this figure into three different figures
The first figure will be 8x4 = 32
The second figure will be 8×6 = 48
The last figure is 2×5 = 10
Done we add 32+48+10= 90

Which relationships describe angles 1 and 2?

Select each correct answer.


adjacent angles

complementary angles

supplementary angles

vertical angles

Answers

Answer:

Complementary Angles

Step-by-step explanation:

They are both in right angles

complementary angles they are both on the origin line

whats greater brianliest + MAX ponits or 4 x 2160 4 x 2610

Answers

It is equal. The same either way. :)

Hey there!

PROBLEM #1. 4 * 2,160

4 * 2,160
= 2,160 * 4

= 2,160 + 2,160 + 2,160 + 2,160

= 4,320 + 4,320

= 8,640
Therefore, the answer should be: 8,640

Problem #2. 4 * 2,610
4 * 2,610
= 2,610 * 4

= 2,610 + 2,610 + 2,610 + 2,610

= 5,220 + 5,220

= 10,440

Therefore, the answer should be:

10,440


Good luck on your assignment & enjoy your day!



~Amphitrite1040:)

what does x equal in this y=2x + 3

Answers

Answer:

y=bh

Step-by-step explanation:


It depends on your y, assuming that you're trying to find the x-intercept;
y = 0,

x = -3/2

ik yall brainly ppl know what this is.

Answers

Lol absolutely no idea so sorry but I would like to know the answer too
This should be right. Just counted the blocks for all, but for the ramp I used pythag. All the adding us for the total surface area which is just the area of all the individual shapes added together

What is the value of x and y please explain will give brainliest if you give me a good explanation!!

Answers

x = 30
y = 120

30 x 4 = 120
120 + 120 = 240
240 + 120 = 360
The first number in an ordered pair is a value for x, and the second number is a value for y.

calling brainiacs... probably some math logic question that im not getting.

Answers

The picture blurry can we get a better picture
All I need is for you to tell me what the first question is asking, which citrus fruit?

Put the following equation of a line into slope-intercept form, simplifying all fractions. 2x-10y=-20

Answers

y = 1/5x + 2


Slope-intercept form:

y = mx + b

First, you must get y alone by subtracting 2x on both sides of the equation and then dividing both sides by -10:

-10y = -2x - 20

y = -2/-10x - 20/-10


Simplify: y = 1/5x + 2

Answer: y = 1/5x + 2

Check out the workings I have done in the document I have uploaded :)

How do you find the surface area of this?

Answers

Answer:

132

Step-by-step explanation:

No way you can find the whole area with one solution. So we have to go by each shape.

Let's start with the triangle on top, only one part of it. We know that half of the base is 3. We could go long and hard and use the pythagorean theorem and then repeat that 8 times. Instead, you can imagine moving the 2 triangles into a rectangle. Now you have a rectangle that is 3x4 inches. Repeat 4 times for each of the triangles. Then just the square which is 6x6. Add them and bam!

The circumference of a circle is 125.6 millimeters. What is the circle's diameter?
Use 3.14 for ​.

Answers

Answer:

C = 2 pi r, so diameter is 40!

Step-by-step explanation

125.6 = 2 pi r

125.6 divided by 2 is 62.8.

Now its, 62.8 = pi times r

62.8/3.14 = 20.

r = 20

but this is the radius so the diameter is 2 times for than the radius. 20 x 2 = 40

The answer to your question is 40

PLEASE HELP!!

Hhuhuhihihi

Answers

Answer: adjacent and complimentary

Step-by-step explanation:

adjacent because they are next to each other and complimentary because they together make 90 degrees

Answer:

The answers are B and D, I did this one.

Yw guys

PLEASE HELP ASAP!!! Which of the ten groups show at least one 8th grader?
A. 3, 7, 8, 10
B. 4
C. 1, 2, 5, 7, 8, 10
D. 1, 3, 4, 5, 6, 7, 8, 10

Answers

Answer:

1 3 4 5 6 7 8 10

Step-by-step explanation:

the numbers 7,8,9,0 represent 8th graders and the groups 1 3 4 5 6 7 8 10 all contain at least one of the numbers while the others groups dont meaning they are no 8th graders in groups 2 or 9

The correct awnser is D, 1,3,4,5,6,7,8,10
Other Questions
These children are facing threats similar to the forceful conscription of child soldiers by warlords in Sudan or during the civil war in Bosnia. Being forced to sell drugs by narcos is no different from being forced into military service.Read the excerpt from Enriques Journey.The MS gangsters decide to retaliate and throw the gangster off the train. Enrique refuses to participate, creating a rift. "If you are MS, you have to kill 18th Streeters. And if you are 18th Street, you must kill MS. I wasn't like that," Enrique says.After the fight with his friends, halfway through Chiapas, the gang members stop riding with Enrique. That night, without their protection, the six men beat him on top of the train.How is the authors purpose similar in both excerpts?Both describe situations in which people have to leave their country to find a better life. Both describe situations in which people are expected to commit crimes or face violence.Both describe situations in which people have the ability to improve their lives by following orders.Both describe situations in which people are given a choice between doing what is expected or doing what is right. Carlos has at most $40 to spend on food for a barbeque. He wants to buy hot dogs and hamburgers and thenAlls for each. Carlos has already spent $31.50 on the hot dogs and hamburgers. Let r represent the amount ofnoney that Carlos can spend on the rolls.Write and solve an inequality. A computer randomly picks a number from the group 20, 21, 22, 23, 24, 25, 26, 27. What is the probability the number is greater than 24 or less than 21? Julia wants to be sure that she can listen effectively to the speaker at the town hall meeting. which strategy will help her succeed?jumping to conclusionsmulti-tasking during the speechprejudging the speakerresearching the topic in advance 18. Identify the constant term in the algebraic expression*A.-1B. 1C. -2D. 2 ____ is knowingly making false statements or representation of material facts to obtain a benefit or payment for which a lesser amount or no amount at all was actually earned. the enclosures in which animals are kept in reserves like the masai mara and at the london zoo are different.use details from both sources to write a summary of the different enclosures. Elisa's location made her friendlier to the man in the carvana. If she lived somewhere else, she might have not paid him any attention. In which location would Elisa most likely have ignored the man? 17) Dr. Lawson receives a check on 10/02/20XX for the previous month for 150 patient. The check is for the amount of $400. Attached to the check is a listing of patients. During the month of September, Dr. Lawson treated only 55 of the patients on that list. What type of insurance plan is Dr.Lawson participating in? 1.Which of these is equivalent toA. 2-191B.271C.223D.(2-4)x2-52-6-? 6/(x^2-3x)=12/x+1/(x-3) with full expanation from the internet What animal would you be and how would it help the environment? PLEASE PLEASE PLEASE HELPPPPPP ??????????!! Select the correct answer. which of these technologies helps to improve employee efficiency? a. augmented reality b. personal information management c. real-time analytics d. robotics e. automated locomotives In the circular flow model, households sell resources to and buy products from _______. Multiple choice question. consumers the government firms other household WILL MARK BRAINLIEST in a paragraph or two explain if world war 2 was a continuation of world war 1 circle the odd one out. give reason for your choice a number, n is multiplied by -5/8 the product is -0.4 how would you set this up to solve Subtract -2x-10from 10x^2+3 Please help i been asking since yesterdayCalculate the perimeter of the triangle for problems B. Calculate the area of the triangle for problems