Answer:
d
Step-by-step explanation:
y
Which situation is an example of an observational study?
O A. Finding the number of red jellybeans placed in an average jar of
O B. Having customers fill out a questionnaire about their favorite
O c. Dividing a class into thirds, giving each third a different amount of
O D. Placing different groups of people in different colored rooms and
jellybeans by counting
brand of toothpaste
time to read, and then testing comprehension
recording their mood
Answer:
it finding the number of jelly beans
Step-by-step explanation:
Having customers fill out a questionnaire about their favorite brand of toothpaste is an example of an observational study.
Option B is the correct answer.
What is an observational study?An observational study is a research method in which the researcher observes and records behavior or data without directly manipulating the variables.
We have,
In an observational study, the researcher simply observes and records data as it naturally occurs, without interfering or influencing the study participants.
This type of study is often used in social science research, as well as in medical research and epidemiology, to study the relationships between variables and to identify patterns or trends in the data.
Observational studies can be either cross-sectional, where data is collected at a single point in time, or longitudinal, where data is collected over an extended period of time.
In this case,
The researchers are simply observing and collecting data without actively manipulating any variables or performing any interventions.
Thus,
Having customers fill out a questionnaire about their favorite brand of toothpaste is an example of an observational study.
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population screening of risky alcohol and drug use via internet and interactive voice response (ivr): a feasibility and psychometric study in a random sample
There were substantial differences in alcohol and drug usage by the manner of administration, however, problem drinking and drug use were present in 21.1% and 2.8% of the group, respectively.
What do you mean by population screening of risky alcohol and drug?The topic of whether data from population surveys could be gathered more quickly and affordably than using paper questionnaires is brought up by the widespread accessibility of computer-based technologies like the Internet and Interactive Voice Response (IVR) systems. The issue extends to whether it is possible to assess the prevalence of such behaviors in the general population when dealing with potentially stigmatized behaviors like problematic alcohol and drug use without endangering the accuracy of the findings. This study evaluates the reliability, response rate, and problematic alcohol and drug use of the Internet and IVR versions of the AUDIT and DUDIT. Randomly chosen from the Swedish general population, 5000 people were contacted by mail and asked to respond to the AUDIT and DUDIT questionnaires online or over the phone.
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H E L P PLZZZ !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
138
Step-by-step explanation:
just plug in the numbers:
4*6^2 - 36/6
use pemdas
4*36 - 6 = 144-6 = 138
Answer: The answer is 138.
Step-by-step explanation: First, find 6 squared. That is 36. Multiply that by 4 to get 144. After that, find 36 divided by 6. That is 6. Finally, subtract 144 and 6.
Help I’m bad at math
Answer:
None of the answers are correct.
Step-by-step explanation:
Maria's answer is incorrect:
1. "-1" is the y-intercept. 3x/4 is your rise/run.
2. Start from -1 on the y-axis.
3. Go up 3 units above, then 4 units to the right.
4. This leads up to being not on the line.
Peter's answer is incorrect:
1. "-1" is the y-intercept. -4x/3 is your rise/run.
2. Start from -1 on the y-axis.
3. Go down 4 units below, then 3 units to the right.
4. This leads up to being not on the line.
Can somebody answer this question please? With explanation.
Best answer gets 5/5 stars + Brainliest
Answer:
23
Step-by-step explanation:
i need brainliest. i promise it is correct.
What's the exact amount of numbers that have been discovered in PI π?
First correct answer will be marked brainliest
Answer:
It has an infinite amount as the decimal keeps going to over 1 million digits and beyond.
Step-by-step explanation:
The perimeter of a rectangle is 56 inches. The length is 4 more than twice the width. Write and solve a system to determine the length of the rectangle
Answer:
56×4=x
so x=224
Step-by-step explanation:
if i am wrong sorry didnt fully understand what you wanted
A 48000 gallon water tank is being filled at a rate of 40 gallons per minute. At this rate, how many minutes will it take to fill this tank 3/5 full?
The minutes it will take for the tank to be 3/5 full is 720 minutes.
When the tank be 3/5 full?A fraction is a non-integer that is made up of a numerator and a denominator. The numerator is the number above and the denominator is the number below. An example of a fraction is 3/5.
The first step is to determine how many gallons the tank would have when it is 3/5 full. To determine this value, multiply the volume of the tank by 3/5.
Gallons when the tank is 3/5 full = 3/5 x 48,000 = 28,800
Now, divide the speed of the water by the gallons in the tank when it is 3/5 full.
28,800 / 40 = 720 minutes
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EVERYONE WE ARE MAKING MATIAS GO VIRAL ON BRAINLY CAPY AND PAST AND SPREAD THE WORD #MATIASISCOOL #GOMATIAS
Answer:
why?
Step-by-step explanation:
Answer:
OTAY
Step-by-step explanation:
simplify 6(2x + 4) – 2x + 15 – y
Please help me on this one I'm tripping on it.
Answer:
10x + 39 - y
Step-by-step explanation:
Answer:
10x - y +39
Step-by-step explanation:
What is the reciprocal of 7/18
Answer:
18/7
Step-by-step explanation:
x=reciprocal of 7/18
7/18 * x = 1 ==> the product of the reciprocal of a number and the number itself is one since the product of the numerator and the product of the denominator would be the same.
7x/18=1
7x/18 * 18=1*18
7x=18
7x/7=18/7
x=18/7
S-2
2 3 4 5
A) y--x-2
C) y = 2x - 2
B) y=-2x - 2
D) y=-2x - 1
Answer:
gmj5
Step-by-step explanation:
t5y6
Solve for
8 - 6r + 3 = 5
Answer:
r = 1
Step-by-step explanation:
8 - 6r + 3 = 5
Combine like terms
11 - 6r = 5
Subtract 5 from both sides
6 - 6r = 0
Add 6r to both sides
6 = 6r
Divide both sides by 6
1 = r
4x^2 + 4x - 3 quadratic trinomial ans pls
Answer:
(2x-1)(2x+3)
Step-by-step explanation:
4x^2 + 4x - 3
4x^2 + 6x - 2x - 3
2x(2x + 3) - 1(2x + 3)
(2x - 1) (2x + 3)
Jose rented a bike from Maurice's Bikes for $18 plus $5 per hour. If Jose paid a total of $38, how many hours did he rent the bike?
Answer: 4 hours
Step-by-step explanation:
38- 18 = 20
20 / 5 = 4
Answer:
4 hours
Step-by-step explanation:
If he paid a total of $38 then you first would subtract the $18. You are left with 20. Divide that by the $5 then you get 4
**50 POINTS + BRAINLIEST ** Does society/government have any effect on the way scientific theories are shaped. Did that have any role in forming the basis for categorizing something as "living?" Does society/government have any influence in
science today? Please give lots of information as possible it’s supposed to be for a essay :) best answer will receive brainliest
Answer:
Society helps determine how its resources are deployed to fund scientific work, encouraging some sorts of research and discouraging others. Similarly, scientists are directly influenced by the interests and needs of society and often direct their research towards topics that will serve society.
Please help me, i will give brainiest !!
Cora ran 3 miles last week and will run 7 miles per week from now on. Hana ran 9 miles last week and will run 4 miles per week from now on.
In the answer box,
Write a system of equations to describe this scenario. Identify what the variables mean in the context of the problem.
Answer:
If Cora runs 1/2 mile per week and x is the number of weeks, then she will run 5+1/2x. Then determine how many weeks are in two and a half months (depends on which month it is as there are less weeks in February than in January!) but we could estimate 6.
For Hana, you will have 3+ 3/4 x
Step-by-step explanation:
First equation is y=5+1/2 x and then plug 6 in for x to solve for y. the second equation is y=3+3/4x and plug in 6.
The system of equations to describe this scenario are
y = 3 + 7xy = 9 + 4xThe variable x means the number of weeks they ran and the y variable means the total distance they covered in miles .
The situation can be modelled like a linear equation.
Therefore,
y = mx + b
where
m = slope
b = y-intercept
Cora race will be as follows:
y = 3 + 7xHana race will be as follows:
y = 9 + 4xThe variable x which is the independent variable is the number of weeks each of them ran in the equation.
The variable y which is the dependent variable is the total distance covered in miles.
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which algebraic equation represents the words: forty percent of mrs. garcia's score is 400 points. what is mrs. garcia's score?
The algebraic equation "0.40x = 400" represents the words: forty percent of Mrs. Garcia's score is 400 points. Mrs. Garcia's score is 1000.
Algebraic equation is an equation made up of variables and coefficients that can be used to solve mathematical problems or questions.
To formulate an algebraic equation, we designate a variable for unknown values.
Mrs. Garcia's score is unknown, and so
let x = Mrs. Garcia's score
Based on the information given on the problem, forty percent of Mrs. Garcia's score is 400 points. Forty percent can be written as 0.40.
40% of x is 400
0.40x = 400
Hence, the algebraic equation for that is 0.40x = 400.
Evaluating the value of x,
0.40x = 400
x = 400 / 0.40
x = 1000
Therefore, Mrs. Garcia's score is 1000.
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I need help plsssss ...... name the transversal that connects them and classify the angle pair
Answers:
The transversal line is line s
The angles 6 and 16 are same side exterior angles
=================================================
Explanation:
Erase everything but lines p, q, and s. Also, we'll keep angles 6 and 16 as well. Check out the diagram below.
As you can see from the diagram, lines p and q act like the parallel lines. Imagine we can shift line p to make it horizontal so it's parallel to line q. This might help show that angles 6 and 16 are same side exterior angles.
Note: Because line p is not parallel to line q, this means angles 6 and 16 are not supplementary (they don't add to 180).
Write a linear function f with the values f(2)= 3 and f(4) = 3.
Answer:
y = 3
Step-by-step explanation:
Linear Function:
y = mx + b
When X = 2, Y should equal 3
(2, 3)
When X = 4, Y should also equal 3
(4, 3)
Another way to ask this question if you are curious:
"Write a linear equation that passes through the points (2, 3) and (4 , 3)
Using the points though, we can use the slope formula equation to get the slope:
y2 - y2
----------
x2 - x1
-plug in the numbers from the points-
3 - 3
------
4 - 2
=
0 / 2
So the slope is going to be 0.
y = 0x + 3
y = 3
what is the simplest form of 1/3 divided by 1/9
Answer:
3
Step-by-step explanation:
3 is the answer to the question
The cost to rent a lodge for a family reunion is $975. If 65 people attend and pay the same price, how much does each person pay? Write an expression to represent the problem.
Answer: 15
Step-by-step explanation:
if 975 dollars paid for 65
975/65=15
please help me! i will give brainlest!
Answer:
16.5 should be correct because OS is half the length.
Wang Hao wants to spend at most \$15$15dollar sign, 15 on dairy products. Each liter of goat milk costs \$2.40$2.40dollar sign, 2, point, 40, and each liter of cow's milk costs \$1.20$1.20dollar sign, 1, point, 20.
Answer:
2.40G + 1.20C ≤15
Step-by-step explanation:
The inequality function is
Given that
The cost of goat milk for each liter is $2.40 = G
And, the cost of the cow milk for each liter is $1.20 = C
Now the equation would be
2.40g + 1.20c
Now this must be lower or equal than $15
So, the inequality function would be
2.40G + 1.20C ≤15
hence, the inequality function is 2.40G + 1.20C ≤15
Answer:
2.4G + 1.2C < or = to 15
Step-by-step explanation:
We are given that each liter of goat milk costs $2.40$2.40dollar sign, 2, point, 40, and each liter of cow's milk costs $1.20$1.20dollar sign, 1, point, 20.How can we express the total cost of liters of goat milk and cow's milk that Wang Hao can buy?Hint #22 / 3The cost of GGG liters of goat milk is 2.4G2.4G2, point, 4, G, and the cost of CCC liters of cow's milk is 1.2C1.2C1, point, 2, C. Therefore, the total cost of liters of goat milk and cow's milk that Wang Hao can buy is 2.4G+1.2C2.4G+1.2C2, point, 4, G, plus, 1, point, 2, C.We are also given that Wang Hao wants to spend at most $15$15dollar sign, 15 on dairy products. This means that it is possible for Wang Hao to spend $15$15dollar sign, 15 or any amount less than this. Let's use this condition to create the appropriate inequality.Hint #33 / 3The following inequality represents the number of liters of goat milk and cow's milk Wang Hao can buy on his budget: 2.4G+1.2C≤152.4G+1.2C≤15
Consider the polynomial function q(x) = -4x5+2x4
3x2 + 12x.
What is the end behavior of the graph of q?
Answer:
B
Step-by-step explanation:
If it’s for khan positive , negative, negative, positive
Write equations for the horizontal and vertical lines passing through the point (-2,-5).
Answer:
y = -5x = - 2=============================
The horizontal line has same y- coordinate for each x- coordinate, and is parallel to the x-axis so it is:
y = - 5The vertical line has same x- coordinate for each y- coordinate, and is parallel to the y-axis so it is:
x = - 2Refer to graphs.
when the least common multiple of two positive integers is divided by their greatest common divisor, the result is 33. if one integer is 45, what is the smallest possible value of the other integer?
The smallest value of the other number will be 3 ×5× 11 =165
In the given statement is :
When the least common multiple of two positive integers is divided by their greatest common divisor, the result is 33. If one integer is 45.
To find what is the smallest possible value of the other integer
Now, According to the question
One of the numbers 3 ×3× 5 = 45
The lowest common multiple has to be a multiple of 45 i.e.,
3 ×3× 5 something when LCM is divided by the greatest common divisor
then the answer is 33 = 3 x 11 .
So the other number will have to be a multiple of 11
3 ×3× 5× 11 × ?/ some factor of 4 = 33
(3 ×5) ×3× 11 × 1 /3 × 5 = 33
So if the greatest common divisor is 3× 5 the given number is 3 ×3× 5
Hence, The smallest value of the other number will be 3 ×5× 11 =165
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what is the slope of y-14=-8(x+2)?
Answer:
slope: -8
Explanation:
[tex]\sf slope\:intercept\:form:y = mx+ b[/tex]
where:
m = slopeb = y-interceptHere equation:
⇒ y - 14 = -8(x + 2)
rewrite:
⇒ y = -8x - 16 + 14
simplify
⇒ y = -8x - 2
Here, the slope is -8 and y-intercept is -2.
what is 35300 in the sceincetific notation
35300 x 10⁰
3530 x 10¹
353 x 10²
35,3 x 10³
3,53 x 10⁴
0,353 x 10⁵
Answer:
3.53x10^4
Step-by-step explanation:
your welcome
~Ren
In ΔHIJ, the measure of ∠J=90°, the measure of ∠H=71°, and JH = 2 feet. Find the length of IJ to the nearest tenth of a foot.
Answer:
IJ is 5.8 ft
Step-by-step explanation:
Here, we want to calculate the length of IJ
to Find IJ, we need the appropriate trigonometric ratio
The trigonometric ratio to use in this case is the one that connects the opposite and the adjacent
from the question, IJ is the opposite
This is the side facing the given angle
HI is the hypotenuse which is the side facing the right-angle
HJ is the third side which is the adjacent
Mathematically;
That is the Tan
Tan 71 = IJ/2
IJ = 2 Tan 71
IJ = 5.8