(A) The lack of any particular intervention or treatment is a distinguishing feature of a quasi-experiment.
What is the hallmark of a quasi-experiment?Experimental and quasi-experimental studies are characterized by testing an intervention's effects.
If a human subject is included in an intervention, the researcher will randomly assign them to either receive the independent variable, such as a modified diet or nutritional supplement or to the control group.
Putting into practice an intervention without using randomization.
"In that, an independent variable is manipulated, quasi-experimental research is comparable to experimental research.
Because there is either no control group, no random selection, no random assignment, or no active manipulation, it varies from experimental research."
Therefore, (A) the lack of any particular intervention or treatment is a distinguishing feature of a quasi-experiment.
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Complete question:
What is the hallmark of a quasi-experiment?
A. the absence of any specific intervention or treatment.
B. high levels of control over treatment conditions.
C. random assignment of participants to conditions.
D. lack of random assignment of participants to conditions.
- sports the distance between each base on a baseball infield is 90 feet. the third baseman throws a ball from third base to point p. to the nearest foot, how far did the player throw the ball?
The distance between the third base and the player is 150 feet.
Pythagoras' theorem states that “In a right-angled triangle, the square of the hypotenuse side is equal to the sum of squares of the other two sides“. The sides of this triangle have been named Perpendicular, Base, and Hypotenuse. Here, the hypotenuse is the longest side, as it is opposite to the angle of 90°. The sides of a right triangle (say a, b, and c) which have positive integer values, when squared, are put into an equation, also called a Pythagorean triple.
In the diagram attached, we can see the locations of the 1st base, 2nd base, 3rd base, and Home plate.
Since these four points form a square of which diagonals are equal in size.
So if we find the distance between the 1st and 3rd base that will be equal to the distance between the Home plate to the second base.
To find the nearest distance,
By applying "Pythagoras' Theorem"
[tex]nearest \ distance =\sqrt{120^2+90^2}\\\\=\sqrt{22500}\\\\=150\ feet.[/tex]
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when there are an even number of observations, and the observations are in order from smallest to largest, the median is... multiple choice question. the last observation the average of the two middle observations the first observation the middle observation average of the first and last observation.
When there are an even number of observations, and the observations are in order from smallest to largest, the median is:The average of the two middle observations.
The median is a measure of central tendency that is commonly used for data sets with an odd number of observations. When there are an even number of observations, the median is defined as the average of the two middle observations. This provides a representative value that splits the data set in half, with half of the observations having values lower than the median, and half having values higher.
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There are 5 red marbles, 8 blue marbles, and 12 green marbles in a bag.
Several trials are performed with the results shown in the table. What is the experimental probability of randomly drawing a green marble?
Red Blue Green
10 12 28
What is the experimental probability of randomly drawing a green marble?
What is the theoretical probability of randomly drawing a green marble?
What would you expect to happen if more trials of the experiment are performed? Explain your reasoning using complete sentences.
The probability of randomly drawing a green marble form the bag would be = 12/25
What is probability?Probability is defined as the expression that show the possible outcome of an event.
The number of red marbles = 5
The number of blue marbles = 8
The number of green marbles = 12
The total number of marbles = 5+12+8 = 25
Therefore the probability of randomly drawing a green marble = 12/25
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8 cm
7cm
6 cm
What is the surface area, in cm², of the figure?
Answer:
Here you have
Step-by-step explanation:
8 x 7 x 6 = 336 cm²
Evaluate: (1) 3p +5(2q+p)+3p-6q
(2) Z+8-6(z-2a)+5z
The values are evaluated to give;
1. 11p + 4q
2. -12a + 8
What is an algebraic expression?An algebraic expression is an expression that is composed of terms, coefficients, variables, factors and constants.
From the information given, we have that;
3p +5(2q+p)+3p-6q
expand the bracket, we get;
3p + 10q + 5p + 3p - 6q
collect and add the like terms
11p + 4q
Then,
Z+8-6(z-2a)+5z
expand the bracket
z + 8 - 6z - 12a + 5z
collect and add the like terms
-12a + 8
Hence, the expression are 11p + 4q and -12a + 8
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What if John found a coupon online for $4 off the original cost of the trip and Andy found a different coupon for 10% off. Who would have saved more and how do you know?
Answer:
There is no given price so lets say I need something that is 85$ and I have a 10% off coupon well I will be saving 8.50$ and only needing to pay 76.50.
4$ would not take that much off only would be paying 81$
Step-by-step explanation:
85 divided by 100 x10 = 8.50
85$-4=81
the manager of a used car lot took inventory of the automobiles on his lot and constructed the following table based on the age of his car and its make (foreign or domestic). a car was randomly selected from the lot. given that the car selected was a domestic car, what is the probability that it was older than 2 years?
The probability that the car selected was a domestic car and older than 2 years is 0.63 or 63%.
Probability is a mathematical concept that quantifies the likelihood or chance of an event occurring. It is a value between 0 and 1, where 0 represents an impossible event and 1 represents a certain event. In between, probabilities reflect the degree of certainty that an event will occur, with values closer to 1 indicating a higher likelihood of occurrence and values closer to 0 indicating a lower likelihood.
The probability of an event is calculated by taking the ratio of the number of favorable outcomes to the total number of possible outcomes.
domestic car older than 2 years/total domestic cars = (28 + 12 + 23)/100 = 63/100 = 0.63 = 63%
Therefore, the probability of selecting a car that is less than 2 year given that it is a domestic car is 0.63 or 63%.
*The problem seems incomplete, attached might be the complete version of it.
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Grade 8 math please help. I’m trying to sleep
The set of points for which y is a function of x is given as follows:
B.
When does a relation represents a function?A relation represents a function when each input value is mapped to a single output value.
For set B in the context of this problem, we have that:
The input of -3 is mapped to an output of 3.The input of -2 is mapped to an output of 2.The input of -1 is mapped to an output of 1.The input of 1 is mapped to an output of -1.As there are no repeated inputs, this is the set that represents y as a function of x.
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using diagonals from a common vertex, how many triangles could be formed from the polygon pictured below tiiip
5 triangles could be formed from the polygon pictured.
What is a triangle?It is a two-dimensional figure which has three sides and the sum of the three angles is equal to 180 degrees.
We have,
The given figure is an irregular heptagon (7 unequal sides).
Now,
Taking a common vertex A we can draw the triangles as given below.
We see that,
There are 5 triangles that can be drawn.
Thus,
5 triangles can be formed.
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Please help asap!! Try ur best <3 • will give u brainliest
The solution of the system of equation is , x= -4 & y= -8.
What is equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign. In its simplest form in algebra, the definition of an equation is a mathematical statement that shows that two mathematical expressions are equal. For instance, 3x + 5 = 14 is an equation, in which 3x + 5 and 14 are two expressions separated by an 'equal' sign.
here, we have,
from the given graph we get,
one line is passing through the points (0,10) , ( 4,28)
so, the equation of the line can be,
4y= 18x + 40
and, second line is passing through the points (0,8) , (1,12)
so, the equation of the line can be,
y= 4x+8
solving the equations we get,
x= -4
y= -8
Hence, The solution of the system of equation is , x= -4 & y= -8.
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What is the slope of the graphed line?
O
I
5/2
O
O
5/2
O
7/2
10
9
8
7
6
5
4
31
21
1
1 2 3
4
5
6
7
8
9 10
Answer:
Step-by-step explanation:
OK YOU ARE GOOD OH AND IT
5/8
given a two-dimensional pore geometry of packed squares as below, plot the porosity as a function of the averaging length scale. the black grains are separated by a distance equal to the grain size in the x and y directions. use a square as the averaging volume and the edge of the square as the averaging length scale. what is the representative elemental volume?
Porosity calculated as ratio of pore to total vol. Plot of porosity vs averaging length scale (edge of square used for averaging). Rep. elemental vol = vol of square used for averaging.
The porosity as a function of the averaging length scale can be calculated as follows:
Define the pore geometry: A two-dimensional pore geometry of packed squares is given, with black grains separated by a distance equal to the grain size in the x and y directions.Select the averaging volume: The averaging volume is defined as a square.Determine the porosity: The porosity is calculated as the ratio of the pore volume to the total volume of the material. In this case, the pore volume is the volume between the black grains and the total volume is the volume of the material.Plot the porosity as a function of the averaging length scale: The averaging length scale is defined as the edge of the square used for averaging. The porosity can be calculated for various values of the averaging length scale and plotted as a function of the averaging length scale.Representative elemental volume: The representative elemental volume is the volume of a single element (e.g. a square in this case) used in the averaging calculation. In this case, the representative elemental volume is equal to the volume of the square used for averaging.Learn more about geometry :
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HELP ASAP
The graph of y = g(x) is shown here. Choose the description that matches how the graph y = g(x+4) shifts relative to y = g(x)
Options
a. left 4
b. right 4
c. down 4
d. up 4
The curve will get shifted left side by four units. Then the correct option is A.
What is a function?A function is an assertion, concept, or principle that establishes an association between two variables. Functions may be found throughout mathematics and are essential for the development of significant links.
The function is given below.
y = g(x)
If the g(x) is replaced with g(x + 4). Then the curve will get shifted left side by four units.
Thus, the correct option is A.
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susan can pick 4 lbs of coffee beans in an hour or gather 2 lbs of nuts. tom can pick 2 lbs of coffee beans in an hour or gather 4 lbs of nuts. each works 6 hrs per day. if they only pick coffee, what is the maximum amount of coffee the two can gather in a day? if they only pick nuts, what is the maximum amount of nuts the two can gather in a day? write the answer as x lbs, y lbs.
Answer:
see below
Step-by-step explanation:
Susan
4lbs of coffee
2lbs of nuts
Tom
2lbs of coffee
4lbs of nuts
6 hrs per day.
if only coffee x = (4+2)*6=36lbs
if only nuts y = (4+2)*6=36lbs
The line representing the equation part of the constraint 7x1 + 4x2 28 goes through the following two points a. (4,0) and (7,0)b. (0,4) and (7,0) c. (4,0) and (0,7) d. (0,4) and (0,7) e. none of the above
The line representing the equation part of the constraint 7x1 + 4x2 28 goes through the following two points e. none of the above.
The equation of a line can be represented as y = mx + b, where m is the slope of the line and b is the y-intercept. The line representing the equation of a constraint, such as 7x1 + 4x2 = 28, would be a straight line in a two-dimensional graph.
The points given in the options a, b, c, and d are pairs of x and y coordinates. To determine if any of these points lie on the line representing the constraint equation, we would need to substitute the x and y values into the equation and see if the equality holds.
For example, for option a, if we substitute x = 4 and y = 0 into the equation, we get 7 * 4 + 4 * 0 = 28, which is not true. Hence, none of the given points in the options lie on the line representing the constraint equation.
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Directions: Based on the information given in the following problem, compute the gross pay.
Annual pay: $14,900. Calculate monthly pay.
Round your answers to two decimal places.
gross pay: $
per month
The gross monthly pay for the given service is $1241.67
What is monthly pay?Monthly pay means the wages paid by an employer to an employee for the whole or part of the month during which the employee is employed by the employer.
Given that, the annual pay of some service is $14900, we need to calculate the monthly pay of same,
Therefore,
To find, monthly pay, we will divide annual pay by 12, because there are 12 months in a year,
Monthly pay = annual pay / 12
= 14900 / 12
= 1241.67
Hence, the gross monthly pay is $1241.67.
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Sales : 1,253.70 commision : 18.6%
The commission earned on the sale of $1253.70 is $233.20
What is commission?A fee paid to an agent or employee for transacting a piece of business or performing a service is called commission.
Given that, there is a commission of 18.6% on the sale of $1253.70
Therefore,
The commission earned = 1253.70 × 18.6%
= 1253.70 × 18.6 / 100
= 233.20
Hence, the commission earned on the sale of $1253.70 is $233.20
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When you left the next morning you needed to fill the car up. 50l of diesel from Sasol costs R799,59 and 40l of diesel from Shell costs R619,60. Which quantity of diesel works out the cheapest per litre?
The rate of diesel in the second case is less. Then the Shell cost is the cheapest per liter.
What is the rate?The rate is the ratio of the amount of something to the unit. For example - If the speed of the car is 20 km/h it means the car travels 20 km in one hour.
50L of diesel from Sasol costs R 799.59. Then the rate is given as,
⇒ 799.59 / 50
⇒ R 15.9918 per liter
40L of diesel from Shell costs R 619.60. Then the rate is given as,
⇒ 619.60 / 40
⇒ R 15.49 per liter
The rate of diesel in the second case is less. Then the Shell cost is the cheapest per liter.
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Solve the inequality -8 < 32.
-8x < 32
?
on both sides. ?
the inequality.
x>-4 is the solution of the inequality -8x < 32
What is Inequality?A relationship between two expressions or values that are not equal to each other is called 'inequality.
The given inequality is -8x < 32
Minus eight times of x less than thirty two.
We need to solve for x which is a variable.
Divide both sides by 8
-x<4
x>-4
Hence, x>-4 is the solution of the inequality -8x < 32
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Calculate the sum of the partial sequence.
[tex]\sum_{n=1}^{75} (12n-9)[/tex]
The required sum of the given partial sequence is 33525.
What is simplification?The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
Here,
The sum of the partial sequence.
[tex]= \sum_{n=1}^{75}12n - 9[/tex]
[tex]= \sum_{n=1}^{75}12n - \sum_{n=1}^{75} 9\\= 34200-675\\=33525[/tex]
Thus, The required sum of the given partial sequence is 33525.
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the mean (average) of 6, 9 and 18 is equal to the mean (average) of 12 and $y$. what is the value of $y$?
Answer:
y = 10
Step-by-step explanation:
[tex]\displaystyle \frac{6+9+18}{3}=\frac{12+y}{2}\\ \\\frac{33}{3}=\frac{12+y}{2}\\ \\11=\frac{12+y}{2}\\ \\22=12+y\\\\10=y[/tex]
3
6+9+18
=
2
12+y
3
33
=
2
12+y
11=
2
12+y
22=12+y
10=y
answer: 10=y
Every matrix transformation is a linear transformation.a. Trueb. false
True , Every matrix transformation is a linear transformation.
Is there a linear transformation for every matrix operation?
Despite the fact that every linear transformation is a matrix transformation, not all linear transformations are matrix transformations.
Because of this, it's possible that we'll encounter a linear transformation in which we're unable to locate a matrix to carry out the mapping.
What alteration does matrix entail?
In a two-dimensional or three-dimensional space, the transformation matrix converts one vector into another vector, which may be comprehended geometrically.
Stretching, squeezing, rotation, reflection, and orthogonal projection are some of the often utilized transformations.
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The cost of breakfast cereal is R36 for 1kg. Calculate how much 5kg of breakfast cereal will cost.
Step 1: To calculate the cost of 5kg of breakfast cereal, we need to multiply the cost of 1kg by 5.
Step 2: R36 x 5 = R180
Step 3: Therefore, 5kg of breakfast cereal will cost R180.
Dominick’s grandfather gave him $300 to start his college savings account. Dominick’s grandfather also gives him $75 each month to add to the account. Dominick’s mother gives him $40 each month, but has been doing so for 3 fewer months than Dominick’s grandfather. Write a simplified expression for the amount of money Dominick has received from his grandfather and mother after m months.
Simplified expression for the amount is 5(36+23m) .
What is an expression?An expression is any mathematical statement which consists of numbers, variables and an arithmetic operation between them. In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.
here, we have,
Step 1: Form an equation for the amount of money Troy has received after m months.
If the total months that Troy's grandfather has given him money is m, then the number of months that Troy's mother has given him money is m - 3.
⇒ Total amount in account = 300 + 75m + 40(m - 3)
= 300 + 75m + 40m-120
=180 + 115m
=5(36+23m)
Hence, Simplified expression for the amount is 5(36+23m) .
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Victor has saved $89.25 for the bicycle that he wants .the bicycle cost $129.85
The model used by Victor in the linear equation is incorrect,
How to identify Linear Equation Models?The parameters are that;
Victor saved: $89.25
Cost of the bicycle = $129.85
Thus, to find the amount extra that he will need to purchase the bicycle, the equation model should be;
$89.25 + x = $129.85
This can be expressed in words as;
The amount of money he already has saved + the amount of money he still requires = the total price of the bike.
An equation that correctly represents this problem can show the sum of the amount of money he already has and the amount of money he needs equals the total cost of the bicycle
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Complete question is;
Victor has saved $89.25 for the bicycle that he wants. The bicycle costs $129.85. Victor writes the equation below to help him determine the additional amount that he needs to solve to have enough to buy the bicycle.
89.25 + 129.85 = x
Does Victor's equation correctly model the problem?
Which are always attributes of both rectangles and squares?
Answer:right angles, two sets of parallel sides, and opposite sides equal.
Step-by-step explanation:
The figure is made up of a semicircle and a triangle.
Find the area of the figure.
Use
�
=
3.14
π=3.14
The area of the figure made up of a semicircle and a triangle is 63.25 ft²
How to solve an equation?An equation is a mathematical expression that contains two or more numbers and variables linked together by mathematical operations such as exponents, multiplication, division, addition, subtraction and so on.
The figure is made up of a semicircle and a triangle.
The semicircle has a diameter of 10 feet. Hence:
Area of semicircle = (1/2) * π * diameter²/4
Substituting:
Area of semicircle = (1/2) * π * 10²/4 = 39.25 ft²
The triangle has a base of 8 ft and height of 6 ft. hence:
Area of triangle = (1/2) * base * height
Substituting:
Area of triangle = (1/2) * 8 ft * 6 ft = 24 ft²
The area of the figure = Area of triangle + Area of semicircle
Area of figure = 24 ft² + 39.25 ft² = 63.25 ft²
The area of the figure is 63.25 ft²
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Please help me with this
The value of the variable, x is 45 degrees
How to determine the valueWe have that the polygon is one with eight sides, that is, it is a regular octagon.
To determine the interior angle, we have
(n - 2) 180
n is the number of sides
(8-2)180
1080 degrees
Now, divide it by the number of sides
1080/8 = 135 degrees
Note that angles on a straight line is equal to 180
Then,
x + 135 = 180
Collect like terms
x = 180 -135
subtract the values
x = 45 degrees
Hence, the value is 45 degrees
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What is the slope of the line that contains the points (7, -1) and (6, - 4)?
Answer:
-1/-3 s the slope
Step-by-step explanation:
(7,-1) and (6,-4)
-4-(-1)=-3
6-7=-1
so -1/-3 is the slope
write an exponential expression for the value of each investment. do not evaluate
can someone please help me on number 27 i kind of understand it but i don’t really understand where you have to do the fraction part :)
The exponential function is A = $2000 × (1 + .03)⁴⁰ and the amount is $6524.1.
What is an exponent?Let a be the initial value and x be the power of the exponent function and b be the increasing factor.
The exponent is given as
y = a(b)ˣ
y = a (1 ± r)ˣ
The rate is 6% for 20 years semiannually. Then the rate is given as,
r = 0.06 / 2
r = 0.03
Then the time is given as,
x = 20 (2)
x = 40
Then the exponential function is given as,
A = $2000 × (1 + 0.03)⁴⁰
A = $2000 × (1.03)⁴⁰
A = $2000 × 3.262
A = $6524.1
The exponential function is A = $2000 × (1 + .03)⁴⁰ and the amount is $6524.1.
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