Option 1: The volunteers are split into 2 groups by a random process. One
group will read the article and the other will not. Everyone will then look at
the city pictures and the diameter of their pupil will be measured while
they look at the pictures. *
Option
Survey
Observational study
Experimental study

Answers

Answer 1

Answer:

Experimental study

Step-by-step explanation:

experimental studies are controlled by the researcher and often the participants are grouped randomly. An difference in the data observed of both groups would be due to intervention of the experimenter.


Related Questions

Andrea wanted to know how much farther she ran on
Tuesday than on Monday. Her work is below.

What mistake did Andrea make when solving the problem?
A. She did not align the decimal points.
B.She did not rename correctly.
C.She added instead of subtracted.
D.She did not subtract 15 and 6 correctly.​

Answers

She did not align the decimal points

Answer:

A

Step-by-step explanation:

edge 2021

The base of a prism has an area of 27 square inches and a perimeter of 36 inches. The surface area of this prism is 144 square inches. Which equation below could be used to find h, the height of this prism, in inches?

A 27h = 144
B 36h = 144
C 2(27) + 36h = 144
D 2(36) + 27h = 144

Answers

The base of a prism has an area of 27 square inches and a perimeter of 36 inches. The surface area of this prism is 144 square inches. Which equation below could be used to find h, the height of this prism, in inches?

The base of a prism has an area of 27 square inches and a perimeter of 36 inches. The surface area of this prism is 144 square inches. Which equation below could be used to find h, the height of this prism, in inches?

what is 4x - 13x =18 will mark brainliest

Answers

Answer:

X = -2

Step-by-step explanation:

4x - 13x = 18

(4 - 13 = -9)

-9x = 18

Divide both sides by -9

x = -2

Answer:

x=-2

Step-by-step explanation:

They already explained ig ^

How much longer does it take a automoblie to travel one mile at 20 miles per hour than at 30 miles per hour? show your work.
a. 1 minute
b. 10 minutes
c. 20 minutes
d. none of these answers.

Answers

Answer:

A

Step-by-step explanation:

At the rate of 20 miles per hour, the car will travel 20 miles every 60 minutes, or a third of a mile every minute. This means that it will travel a mile in 3 minutes. For the car travelling at 30 miles per hour, it will travel half a mile every minute, or a mile every 2 minutes. 3-2=1 minute, or choice A. Hope this helps!

The answer is A ! 1 minute


A line passes through the point (9, 4) and has a slope of
4 over 3
Write an equation in slope-intercept form for this line.

Answers

Answer: y = 4/3x-9

Step-by-step explanation:

We just need to find the y-intercept, b. Recall that y-intercept form is y=mx+b. Plug in what we have. y=-4, m= 4/3, x=-9.

4= 4/3(9)+b

4=13+b

-9=b

now rewrite the equation with b now. y= 4/3x-9

How is the the graph of y=
1
2x - 6
obtained from the graph of y = ?
A)
Vertically stretched by a factor of 2 and shifted right by 3 units.
B)
Vertically stretched by a factor of 3 and shifted right by 2 units.
Horizontally stretched by a factor of 2 and shifted left by 3 units.
D)
Horizontally compressed by a factor of 2 and shifted right by 3 units.

Answers

Answer:

did u ever find out the answer ?

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

In two the three sentences, explain how you find the value that would complete the ordered pair if the point is on the
graph of f(x) = 4x - 6?
(3,_____)

Answers

To find the value that would complete the ordered pair you would have to plug x, which is 3, into the x in the equation f(x)=4x-6. So, you would multiply 4 by 3 and then subtract 6. The answer you get from that is 6 which is y, or f(x).

4x — 9 = 6 — x
Help please

Answers

Step-by-step explanation:

4x - 9 = 6- x

4x + x = 6 + 9

5x = 15

x = 15/5

x = 3

Answer:

X=3

Step-by-step explanation:

4x — 9 = 6 — x

Add 9 on both sides

4x=15-x

add x on both sides

5x =15

divide by 5

x=3

A bag contains 21 red marbles, 4 white marbles, and 3 gray marbles. Do you randomly pick out a marble recorded color and put it back in the bag. You repeat this process 84 times. How many white or gray marbles do you expect to get?

Answers

Answer:

28

Step-by-step explanation:

you add 21, 4, and 3 to find the total

then you find how many are white or gray

7/28= 1/3

1/3 times 84

84 times 1 divided by 3

84/3

What is the value for y?
Enter your answer in the box.

Answers

Answer:

y = 14

Step-by-step explanation:

The sum of the angles in a triangle add to 180 degrees

50 + 2x+ 5y + 10 = 180

We know that 2x = 50 since they are the base angles of sides that have the same length, they must be the same

50 + 50 + 5y+10 =180

Combine like terms

110 + 5y =180

Subtract 110 from each side

110+5y-110 = 180-110

5y = 70

Divide each side by 5

5y/5 =70/5

y = 14

The answer is y = 14

what is the value of x?
help PLS

Answers

The value of X is 80 degree.

Please see the attached picture for full solution

Hope it helps...

Good luck on your assignment

A cylinder has a base radius of 6 centimeters and a height of 20 centimeters. What is
its volume in cubic centimeters, to the nearest tenths place?

Answers

Solution,

Radius(r)=6 cm

Height(h)=20 cm

Volume of cylinder= pi (r)^2 h

=3.14*(6)^2*20

=3.14*36*20

=2260.8 cm^3

Hope it helps

Good luck on your assignment

The required volume of the given cylinder is 2260.8  cubic centimeters.

What is the volume of a cylinder?

The volume of a cylinder is equal to the product of the area of the circular base and the height of a cylinder. The volume of a cylinder is defined as the space occupied by the cylinder as the volume of any three-dimensional shape is the space occupied by it

V = πr²h

where 'r' is the radius of the base (circle) of the cylinder

'h' is the height of the cylinder

As per the given question, we have data as:

Radius(r) = 6 cm

Height(h) = 20 cm

Volume of cylinder = πr²h

Volume of cylinder = 3.14 × (6)² × 20

Volume of cylinder = 3.14 × 36 × 20

Volume of cylinder = 2260.8 cm³

Thus, the required volume of the given cylinder is 2260.8  cubic centimeters.

Learn more about the volume of cylinder here :

brainly.com/question/16134180

#SPJ2

*ANSWER WITH DETAILS PLS*

Answers

Answer:

last one is the answer

(x-a)^2 + (y-b)^2 = r^2

where (a ,b) are the coordinates of the centre and r, the radius

A radio costs $45.00 and is on sale for 30% off. Find the final price of the radio after the discount.

Answers

Answer:

The original price is $45

Theres a discount of 30%

30% of 45 is found by multiplying both of the numbers:

30% x 45 = $13.5

The final price after the discount is $13.5

pls hit the thx button and mark me brainliest if this helped :)

Hey!!

Solution,

Marked Price(MP)=$45.00

Discount percent=30%

Now,

Discount amount=Discount % of MP

= 30% of 45

=$13.5

Again,

Sale price(SP)=MP-Discount

= 45-13.5

=$31.5

The final price of the radio after the discount is $ 31.5

Hope it helps

Good luck on your assignment

PLEASE HELP WITH THIS CONDITIONAL PROBABILITY QUESTION AND PLEAS COULD YOU SHOW A STEP BY STEP EXPLANATION.

Adam and Boris regularly play each other at chess and in 60% of their games each player is subject to ta time limit but only 30% of the games played without a time limit.

(a) Find the probability that Adam wins his next game of chess against Boris

(b) Given that Adam wins a game, find the probability that it was played with a time limit.

Answers

Hello I know this may be difficult on your end but you don’t always have to get the answer from someone you can contact a teacher and get help this keep be very helpful keep this in your head you are intelligent no matter what anyone tells you ask your teacher a question about the problem tell them you don’t get how to do it if you have to just whatever it takes for you to learn how to do it have a wonderful day or night bye!!!...

The following blueprint of a kitchen has dimensions of 8 inches by 8 inches. The island has been highlighted in red.


The island's actual dimensions are feet by feet. If the scale of the blueprint is 1 inch = feet, what are the dimensions of the island on the blueprint?

Answers

Answer:

so assuming 1 3/4 feet by feet means 1 3/4 feet by 1 foot,

island actual dimentions=1 3/4 feet by 1 foot

scale=1 inch=1 feet

logically, blueprints are smaller so for every real foot, 1 inch is drawn on the scale

so change every foot to inch

so the island on the blueprint=1 3/4 inch by 1 inch

Step-by-step explanation:

this is for 7 not 8 just switch up the numbers

If f(x) = -2x2 + x – 5, what is f(3)?

Answers

F(3)=2x2-3-5

= 4-3-5

=1-5

=-4

PLZ HURRY

The graphed line shown below is y = negative 3 x + 6. On a coordinate plane, a line goes through points (1, 3) and (2, 0). Which equation, when graphed with the given equation, will form a system that has no solution? A)y = 3 x + 6 B)y = negative 3 (x + 6) C)y = negative 3 (x minus 2) D)y = 3 (x minus 2).

Answers

Answer:

y = -3 (x + 6)   when graphed with the given equation, will form a system that has no solution

Step-by-step explanation:

Given line equation: [tex]y=-3x+6[/tex]

We are supposed to find Which equation, when graphed with the given equation, will form a system that has no solution.

We know that a system of two linear equations has no solution if and only if the two equations have the same slope, but not the same y-intercept.

General equation of line = [tex]y=mx+c[/tex]

A)y = 3 x + 6

So, Slope = 3

B)y = -3 (x + 6)

y=-3x-18

So, slope=-3

C)y=-3(x-2)

y=-3x+6

So, Slope = -3

D)y=3(x-2)

Slope =3

So, B has the same slope but different intercept

So,y = -3 (x + 6)   when graphed with the given equation, will form a system that has no solution

Answer:

B) y= -3(x+6)

Step-by-step explanation

SOMEONE PLEASE HELP ME ASAP PLEASE!!!​

Answers

Answer:

C = 81.64 cm

Step-by-step explanation:

You are given the circumference formula. Simply plug in your radius and multiply to get your final answer of 81.64 cm.

Answer:

C =81.64 cm

Step-by-step explanation:

The circumference is given by

C = 2 * pi *r

The radius is 13 and pi = 3.14

C = 2 * 3.14 * 13

C =81.64 cm

Translate the sentence into an equation.
Five times the sum of a number and 3 equals 4.
Use the variable y for the unknown number.

Answers

Answer:

5*x+3=4

Step-by-step explanation:

-2

The expression can be written as 5x + 3 =4 and the value of y is 0.2.

What is an expression?

Expression in maths is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

Given that five times, the sum of a number and 3 equals 4. the expression can be written as,

5x + 3 = 4

5x = 4 - 3

5x  = 1

x = 1 /5 = 0.2

To know more about an expression follow

https://brainly.com/question/25968875

#SPJ2

Please help I’m second guessing this and I know I shouldn’t be but I need need an second opinion. Thanks ps the questions are on the bottom!

Answers

Answer:

The kangaroo and Sugar glider

Step-by-step explanation:

They both have 4 x’s (relations) and are found in Australia

The rat snake is least related looking on the chart there’s only one relation between the animal and the others

A school is painting its logo in the shape of a triangle in the middle of its sports field. The school wants the height of the triangle to be 8 feet. The area of the logo must be less than 20 square feet. (The school doesn't want to buy more paint.) Write an inequality that describes the possible base lengths (in feet) of the triangle.



Use b for the base length of the triangular logo

Answers

Answer:

Step-by-step explanation:

Bilal has made a box in the shape of a cuboid with sides 4cm, 5cm and 32cm. He wants to make another different shaped box but with the same volume. This box will have a height of 10cm and a square base. What will be the length on the base?

Answers

Answer:

64

Step-by-step explanation:

v=l×b×h

4×5×32

640

v=hb

640=10x

10x=640

x=640/10

x=64

Answer:

4 x 5 x 32 = 640

640/10=64

since length squared = area of square we square root

64 square root is 8

10 x 8 x 8 = 4 x 5 x 32

Hope this helps. Answer is 8

Step-by-step explanation:

Create two one-step equations and explain how to solve them.

Answers

Answer:

x+3=6

x=3 (subtract 3)

3x=9

x=3 (divide 3)

Answer:

4x=20 and x+7=19

Step-by-step explanation:

4x=20.  To solve this you divide both sides by 4 and get x=5.

x+7=19.  To solve this you subtract both sides by 7 and get x=12

I really need this done because it's the end of the year. 15 POINTS! asap please :D

Answers

Answer:

im not sure that seams hard but if you take some graph stuff off all of them exept for the biggest one and try to even it out then that should help you out.

Step-by-step explanation:

Answer:

16

Step-by-step explanation:

because the it is the highest number on the chart

5) What is the difference between a debit card and a credit card? What are some advantages and disadvantages of using a credit card?

Answers

Answer:The difference is that a debit card has a Visa® or Mastercard® logo on its face. When you use a debit card, the money is deducted from your checking account. With a credit card, you're borrowing money to be repaid later. ATM and debit cards allow you to use ATMs, a safe and convenient way to manage your money.

Step-by-step explanation:

Credit is important when wanting to buy a house or a car and much more.

Simple answer is that a debit card is money and only your money whatever to earn and deposit is all yours, and a credit card is borrowed money for example if you want to buy something a bit expensive you can use a credit card and pay it in payments to the bank instead of directly to a store

Select the correct answer from the drop-down menu.
Which expression represents the quotient of this model?
-x-2
X-2
-X + 2
x+2
quotient:

Answers

Answer:

The correct option is C.

C) -x + 2

Step-by-step explanation:

In mathematics, the term which is being divided is called a dividend. The term by which the dividend is getting divided is called a divisor. The quotient is the term we get after dividing the dividend by a divisor.

Here in this case, the dividend is written.

-x²    x    x

which in the equation form is written as

-x² + x + x

add the x terms to simplify

-x² + 2x

The divisor is given as x, divide the equation by x:

(-x² + 2x)/x

(-x²/x) + (2x/x)

-x+2

Which is the quotient.

Answer:

C

Step-by-step explanation:

What is the value of the expression shown when n = 6?

“8 less than the quotient of 42 and a number”
8 minus StartFraction 42 Over n EndFraction; when n = 6 the expression equals 1
StartFraction 42 Over n EndFraction minus 8; when n = 6 the expression equals –1
42 minus 8 n; when n = 6 the expression equals –6
8 n minus 42; when n = 6 the expression equals 6

Answers

Answer:

StartFraction 42 Over n EndFraction minus 8; when n = 6 the expression equals –1

Step-by-step explanation:

Let's put the equation into numbers:

“8 less than the quotient of 42 and a number”

= 42/n - 8

Now, substitute 6 into this expression:

42/6 - 8

= 7 - 8

= -1

Answer:

its b

Step-by-step explanation:

3. Which of the following
expressions can be
used to find how many
kilograms of sweet
potatoes are needed
for the recipe?
Soup Recipe
DATA
1 onion
2,000 grams sweet potatoes
3 liters water
15 milliliters chicken stock
A 1,000 divided 2,000
B 2,000 divided 1,000
C 2,000 X 1,000
D 2,000 X 100

Answers

The answer is B.
Every 1 kilogram is 1000 grams, so 2000 grams is equal to 2 kilograms. 2000 divided by 1000 is equal to 2.

write an equation that can be used to find the value of x.

Answers

Answer:

x=29

Step-by-step explanation:

Since you have a 90° angle drawn, all of those angles added together has to equal 90. To solve this you add all of them to get 3x+3=90°. First, subtract the 3 to get the x variable on one side. After this, you get 3x=87. Then, divide by 3 to get x=29. To check this, plug in 29 for x in the equation and add them altogether, it should equal 90° :)

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