Answer:
KentuckyCriedChickens
an educational psychologist wanted to know the effects of four different methods of teaching arithmetic. using 12 classrooms, each method was used in the classes. at the end of the school year, all the pupils took the same achievement test, and the means for groups receiving different methods were compared. answer the following questions about the study. a. what was the dependent variable? b. what was the independent variable? c. what was a controlled variable? d. give an example of a parameter.
The dependent variable depends on a particular situation. The independent variable does depends on the result of an experiment. The controlled variable is a variable whose value is constant.
What is dependent variable?
The variable being measured or tested in an experiment is known as the dependent variable. The results of the participants' tests, for instance, since that is what is being measured, would be the dependent variable in a study looking at how tutoring affects test scores.
What is independent variable?
This isn't the same as an experiment's independent variable, which is a variable that can stand on its own. Tutoring would be the independent variable in the aforementioned case. The dependent variable (test results), however, may alter depending on the independent variable (tutoring).
What is controlled variable?
Anything kept constant or constrained in a research study is referred to as a control variable. Despite not being relevant to the study's objectives, this variable is controlled because it might have an impact on the results.
Numbers called parameters are used to define the characteristics of entire populations. Statistics are numerical representations of sample characteristics. One population parameter is the average income in the United States.
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what is the equation of the linear graph
Answer: C
Step-by-step explanation:
All i used was a desmos graphing calculator
i^50
Answer this question, include your reasoning and steps.
Answer:
-1
Step-by-step explanation:
Given:
[tex]i^{50}[/tex]
Rewrite 50 as the product of 2 and 25:
[tex]\implies i^{(2 \cdot 25)}[/tex]
[tex]\textsf{Apply the exponent rule} \quad a^{bc}=(a^b)^c:[/tex]
[tex]\implies \left(i^2\right)^{25}[/tex]
Apply the imaginary number rule i² = -1 :
[tex]\implies \left(-1\right)^{25}[/tex]
[tex]\textsf{Apply the exponent rule} \quad (-a)^n=-a^n,\:\: \textsf{ if }n \textsf{ is odd}:[/tex]
[tex]\implies -1^{25}[/tex]
As 1²⁵ = 1 then:
[tex]\implies -1[/tex]
Answer:
(i)⁵⁰ = -1
Step-by-step explanation:
The problem is,
→ (i)⁵⁰
Formula we use,
→ i² = -1
Let's solve the problem,
→ (i)⁵⁰
→ (i²)²⁵
→ (-1)²⁵
→ -1
Hence, the answer is -1.
solve for x and y
picture provided
The value of x will be 15 and the value of y will be 4.
What is the similarity?If two objects are having the same shape then they will be termed as similar. So in mathematics, if two figures have the same shapes, lines or angles then they are called similar.
Here in the image, we have a triangle having sub-triangles. The value of x is calculated by considering two right-hand triangles.
x / ( x + 5 ) = 18 / ( 18 + 6 )
x / ( x + 5 ) = 18 / 24
24x = 18x + 90
6x = 90
x = 15
The value of y will be calculated by considering the two left-hand triangles.
12 / ( 12 + y) = 15 / 20
240 = 180 + 15y
15y = 60
y = 60 / 15
y = 4
Therefore, the value of x will be 15 and the value of y will be 4.
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Can someone pls give me the answer to this???
Answer:
By comparing both the figures there is a difference of 6
[tex]x + 1 = 24 - 6 \\ x = 24 - 6 - 1 \\ x = 17[/tex]
a wooden cube nn units on a side is painted red on all six faces and then cut into n^3n 3 unit cubes. exactly one-fourth of the total number of faces of the unit cubes are red. what is nn?
After being painted red on all six faces, a hardwood cube with nn units on each side is chopped into n3n 3-unit cubes. The unit cubes have exactly one-fourth of their faces be red, therefore nn equals 4.
On each face of the large wooden cube, there are tiny faces that have been painted red.
There are few faces overall because each unit cube has faces.
Given that one-fourth of the little faces are red,
[tex]6n^2/6n^3[/tex] [tex]= 1/4[/tex]
[tex]1/n = 1/4[/tex]
[tex]N=4[/tex]
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In ΔTUV, m∠T = 58° and m∠U = 97°. Which list has the sides of ΔTUV in order from longest to shortest?
The sides of ΔTUV in order from longest to shortest is as follows -
TV > TU > VU
What is triangle?A triangle is a polygon with three edges and three vertices. The sum of all the angles of a triangle is 180 degrees. Mathematically -
∠x + ∠y + ∠z = 180°
The sum of two sides of a triangle is greater then the third side. Mathematically -
a + b > c
There are different types of triangles such as -
equilateral triangle , scalene triangle , isosceles triangle etc.
Given is ΔTUV, m∠T = 58° and m∠U = 97°.
Refer to the image attached.
TV > VU
TU + VU > TV
TV > TU + VU
So we can arrange the sides as follows -
TV > TU > VU
Therefore, the sides of ΔTUV in order from longest to shortest is as follows -
TV > TU > VU
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Heidi thinks the rule for the table below is y = x + 3.
Is she correct?
X
-2
-1
0
1
2
y
-7
-4
-1
2
5
Which of the following statements about the box-and-whisker plot below is true?
10 20 30
40
70 80 90 100 110 120 130 140 150
There are more data points in the upper two quartiles than in the lower two quartiles.
There are more data points inside the data box than are in the outside the data box.
The midrange of the data set shown is 85.
The midrange of the data set shown is 55.
50 60
The midrange of the data set shown is 85 is true about the box-and-whisker plot below. The middle is the number in question. The least and greatest values should be added together, divided by two, or, in other words, the mean of the least and biggest values should be determined.
How do you find the midrange on a box and whisker plot?It is also helpful to know the number that lies halfway between the data set's lowest and highest values. The middle is the number in question. The least and greatest values should be added together, divided by two, or, in other words, the mean of the least and biggest values should be determined.so,The midrange of the data set shown is 85midrange: Divide by two the sum of the highest and lowest values. 125 is the range. The middle number is 82.5.The difference between the greatest and smallest numbers called the range. The midpoint represents the mean between the largest and lowest number.To learn more about midrange refer to:
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Based on the scatterplot, which statements are true? Select TWO correct answers. The kitten should weigh between 22 oz and 24 oz on Day 24. The kitten should have weighed between 5 oz and 7 oz on Day 4. The kitten should have weighed between 7 oz and 9 oz on Day 8. The kitten should have weighed between 13 oz and 15 oz on Day 12. The kitten should have weighed between 12 oz and 14 oz on Day 19.
HELP ASAP!!
The correct statements regarding the scatter plot are given as follows:
The kitten should have weighed between 5 oz and 7 oz on Day 4.The kitten should have weighed between 7 oz and 9 oz on Day 8.For what the scatter plot is used?The scatter plot is used to give the points needed to build the linear regression equation relating the output variable of the vertical axis as a function of the input variable represented by the horizontal axis.
In the context of this problem, these points are given as follows:
(0, 4), (2, 5), (7,7), (9, 10), (14, 12), (15, 15), (21, 17).
Inserting these points into a linear regression calculator, the equation is listed as follows:
y = 0.6529x + 3.65758
On each day listed on the options, the predicted weights are given as follows:
Day 4: 0.6529(4) + 3.65758 = 6.7 oz.Day 8: 0.6529(8) + 3.65758 = 8.9 oz.Day 12: 0.6529(12) + 3.65758 = 11.5 oz.Day 19: 0.6529(19) + 3.65758 = 16 oz.Day 24: 0.6529(24) + 3.65758 = 19.3 oz.From these numeric values, the correct options are selected.
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in a class of 20 students, there are two students a and b. what will be the probability of selecting these two students randomly?
The probability of selecting two students (a and b) randomly is found as 1/380.
What is referred as the word probability?The study of random experiments is what aids in determining the likelihood of an event.The study of probabilities, which are determined by the ratio of favorable cases to possible cases, is known as probability.The formula for evaluating the Probability is-
Probability = Favourable outcomes / Total outcomes.
As, per the given question.
Total number of students = 20.
The probability for selection of 'a' is 1/20.
Now, the total students left is 19.
Thus, the probability for selection of 'b' is 1/19.
The total probability for selection of both is -
Probability(a and b) = 1/20×1/19
Probability(a and b) = 1/380
Thus, the probability of selecting two students ( a and b) randomly is found as 1/380.
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A biology class examined some flowers in a local meadow. They saw 60 flowers, of which 70% were perennials. How many perennial flowers did the students see?
The number of perennials flower from 60 flowers seen by the students with of which 70% were perennials flowers is 42.
What is perennial flower?Perennials Flowers are plants that live more than two years.
To calculate the amount of perennial flowers seen by the students, we use the techniques of percentage.
Using the formula,
P = N(q)/100............. Equation 1Where:
P = Number of perennial flowers seen by the studentsN = Total number of flowers seenq = Percentage of perennials flowers from the total number of flowers seen.From the question,
Given:
N = 60 flowersq = 70%Substitute these values into equation 1
P = (60×70)/100P = 42.Hence, the number of perennials flower is 42.
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x^2-36=0
solve by graphing
The solutions for the given equation is (6, -6). The graph for the given equation is plotted below.
The given equation is x²-36=0.
What is the graph?Graph is a mathematical representation of a network and it describes the relationship between lines and points. A graph consists of some points and lines between them. The length of the lines and position of the points do not matter.
We need to graph the given equation
x²-36=0
⇒ x²=36
⇒ x=±√36
⇒ x=±6
So, solution is (6, -6)
The graph for equation x²-36=0 is given below
The solutions for the given equation is (6, -6). The graph for the given equation is plotted below.
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How will you solve problems involving equations of circles and coordinates?
NEED ASAP
An equation is a mathematical statement showing the equality of two
opposite variables
How to determine the equation of the circle using coordinates?
The equation of a circle is determined by the function r²=(x-x1)² +(y-y1)²
where :
(x1,y1,) marks the centre of the circlex,y marks the points on the circumference of the circumference of the circler marks the radius of the circlethen, the last thing is to write the equation of the circle and input the values of the coordinates to arrive at your answer,
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Find the slope of the line. Write your answer in simplest form.
HELP ME PLEASEEEEEEEEEEEEEEEEEEEEE
Answer:
0,3
Step-by-step explanation:
it between the 2 and it is negative and positive cases in the -2
Jonathan‘s scout troop tie-dyed sweatshirts and T-shirts last year for a fundraiser. For every 20 sweatshirts they dyed 30 T-shirts. This year Jonathan scout troop will keep the same ratio of sweatshirts and T-shirts. They plan to tie-dye 60 sweatshirts.
How many T-shirts with Jonathan Scout troop dye this year?
Answer:90 t shirts
Step-by-step explanation: 20:30 is the ratio and if they make 60 sweatshirts, they would have to make 90 tshirts as well. this would keep the same ratio
Could anyone solve this please.
Answer:
135 degrees
Step-by-step explanation:
a triangle rule is sum of all three angles equal 180
We know one angle of the triangle angle is 45 degrees because of the corresponding angle below it
So we just subtract 45 from 180
180-45=135
hopes this helps please mark brainliest
Look at this graph:
What is the slope?
Answer:
4/3x
Step-by-step explanation:
a plane has a cruising speed of 250 miles per hour when there is no wind. at this speed, the plane flew miles with the wind in the same amount of time it flew miles against the wind. find the speed of the wind.
The speed of the wind is 50 mph.
Define speed.Speed, expressed in terms of meters per second, is the rate at which an object's position changes. A thing moves one metre in one second, for instance, if it starts at the origin and moves three metres in three seconds. The formula for speed is as straightforward as dividing a distance by a time.
Given,
250 mph for the plane's speed when there is no wind
v is the wind speed.
Think about how the plane will move against the wind:
V' = the rate of flight of the aircraft against the wind = V + v = 250 + v
300 miles is the distance travelled in d'.
T is the passage of time over the distance.
The distance's travel time is specified as
t' = d'/V'
t' = 300/(250 + v) eq-1
Think about how the plane moves when flying against the wind:
V" is the speed of a plane travelling against the wind and equals V - v. This equals 250 - v.
D" = 200 miles of distance travelled
t" is the passage of time over the distance.
The distance's travel time is specified as
t'' = d''/V''
t'' = 200/(250 - v) eq-2
Due to this:
travelling time of 300 time required to drive 200 miles in miles
t' = t''
using eqs 1 and 2
300/(250 + v) = 200/(250 - v) (250 - v)
3/(250 + v) = 2/(250 - v) (250 - v)
750 - 3 v = 500 + 2 v
5 v = 250
v = 50 mph
The speed of the wind is 50 mph.
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Me ayudan porfavor 2 trinomios cuya diferencia sea 4x²-7x+5
Answer:
Δ = b² - 4ac
Step-by-step explanation:
do math
Determine which set of side measurements could be used to form a right triangle.
square root of 19 comma square root of 35 comma 54
square root of 15 comma 6 comma square root of 51
5, 8, 30
5, 6, 7
Answer:
Square root 19 comma, 5,8,30
Answer:5,8,30
Step-by-step explanation: i took a test
PLS HELP!!!
30 = y/2 + 8
y = ____
Answer:
y = 44
Step-by-step explanation:
y = 300
---------------------------------------
Steps are in the attached picture!
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Joke: What runs around a farm but doesn’t move?
Answer: A fence.
Have a great day and God bless! :D
[tex]\left \{ {{y=x^2+x-1} \atop {y + 2 x = 3}} \right.[/tex]
Solve the following system of equations algebraically or by graphing, and give the answer as points. Which method did you pick and why?
How could you check your answer afterwards?
Solving the system of equations using the algebraic method gives x = 1 or x = -4
How to solve the system of equations algebraically?Given: y = x²+x-1 and y+2x=3
In order to solve the system of equations algebraically
First, rewrite y+2x=3 to make y the subject:
y = 3-2x
Then, equate the two y of the equations and solve for x:
x²+x-1 = 3-2x
x²+x-1-3+2x = 0
x²+3x-4 = 0 (factorize)
x²+4x-1x-4 = 0
(x-1)(x+4) = 0
x-1 = 0 or x+4 = 0
x = 1 or x = -4
Therefore, the solution of the system of equations is x = 1 or x = -4
I pick the algebraic method because it is easier, faster and more accurate
I can check my answer by substituting the values of x into the equation
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Answer:
(-4, 11) and (1, 1)
Step-by-step explanation:
Given system of equations:
[tex]\begin{cases}y=x^2+x-1\\y+2x=3\end{cases}[/tex]
The solutions to the given system of equations are the points of intersection of the two graphs.
To solve the given system of equations algebraically, first rearrange the second equation to make y the subject:
[tex]\implies y=3-2x[/tex]
Substitute the found expression for y into the first equation:
[tex]3-2x=x^2+x-1[/tex]
Rearrange to a quadratic equation and factor:
[tex]x^2+3x-4=0[/tex]
[tex]x^2+4x-x-4=0[/tex]
[tex]x(x+4)-1(x+4)=0[/tex]
[tex](x+4)(x-1)=0[/tex]
Apply the zero-product property to solve for x:
[tex](x+4)=0\implies x=-4[/tex]
[tex](x-1)=0\implies x=1[/tex]
To find the y-values of the solutions, substitute the found x-values into the rearranged second equation:
[tex]x=-4 \implies y=3-2(-4)=11[/tex]
[tex]x=1\implies y=3-2(1)=1[/tex]
Therefore, the solutions to the given system of equations are:
(-4, 11) and (1, 1)a new car model is available with 5 choices of color, 3 choices of transmission and 4 types of interior. how many different variations of this model car are possible?
In 120 different variations of this model car are possible.
Define multiplication.One of the four fundamental mathematical operations, along with addition, subtraction, and division, is multiplication. Multiply in mathematics refers to the continual addition of sets of identical size. Let's use the ice creams as a multiplication example to help us comprehend. There are two such groupings, and each group has ice cream.
Calculating the sum of two numbers multiplied together is the process of multiplication. Simple tests in addition, subtraction, multiplication, and division will be given. 2. a noncount noun The process or occurrence of something of a certain kind multiplying occurs when their quantity or number increases.
Given,
There are five different ways to choose a car's color.
3 different car transmission selection options are available.
There are four different interior automobile selection options.
There are two different ways to pick a car's engine.
The potential number of car variations is thus:
Multiplying:
5 × 3 × 4× 2
120
In 120 different variations of this model car are possible.
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There are 15 circles and 6 squares. What is the simplest ratio of squares to total shapes?
Answer:
2/7Step-by-step explanation:
There are 15 circles and 6 squares.
Total shapes:
15 + 6 = 21Ratio of squares to total shapes:
6/21 = 2/7Answer:
the answer is 2:7
Step-by-step explanation:
6÷3 : 21÷3
=2:7
the team is going to a race and can only enter 5 participants. what is the probability of randomly selecting a race squad of 5 participants with exactly 3 women? round your answer to three decimal places. enter your solution into variable
The probability that the squad will have exactly three women members is 0.389
Total number of people in CU Boulder triathlon = 21
Number of Men = 9
Number of Women = 12
We are told that a 5-member squad is selected and now we want to find the probability that the squad will have exactly 3 women members.
Thus;
P(exactly 3 womens) = (12C3 * 9C2)/(21C5)
P(exactly 3 womens) =7920/1716
P(exactly 3 womens) = 0.389
Hence, the probability that the squad will have exactly three women members is 0.389
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please help me with this problem!!
An equation is a collection of variables and constants. The value of x and y for the system of the equation as -2x - 4y = -18 and x = y will be x = 3 and y = 3.
What is the equation?There are many different ways to define an equation. The definition of an equation in algebra is a mathematical statement that demonstrates the equality of 2 mathematical expressions.
As per the given system of equations,
-2x - 4y = -18 and x = y
Substitute, x = y
-2(y) - 4y = -18
-6y = -18
y = 3 and x = 3
Hence "The value of x and y for the system of the equation as -2x - 4y = -18 and x = y will be x = 3 and y = 3".
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help meeeeeeeee pleaseeeee rn rnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
help meeeeeeeee pleaseeeee rn rnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
help meeeeeeeee pleaseeeee rn rnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
help meeeeeeeee pleaseeeee rn rnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The total number of participants who went on the seventh-grade field trip to the Pink Palace consisted of all of the seventh-grade students and 19 adult chaperones. Two-thirds of the total participants rode a large bus, and the rest rode a smaller bus. If 104 people rode the larger bus, how many students went on the field trip? Write your answer below as a single integer.
The number of students that went on the field trip is 137.
How many students went on the field trip?Let s represent the number of seventh grade students that went on the field trip.
Total number of participants = number of students + number of teachers
a + 19
Number of participants that rode the larger bus : 2/3 x (a + 19) = 104
In order to determine the value of a, take the following steps:
Multiply both sides of the fraction by 3 / 2
a + 19 = 104 x 3 / 2
a + 19 = 156
Subtract 19 from both sides of the equation:
a = 156 - 19
a = 137
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What is the generator for the sequence: 1, 3, 9, 27, 81, ... *
O 2
O 4/3
O 8/3
O 3
Answer:
3
Step-by-step explanation:
what it means by generator is the continuance of the multiplication process so 1x3=3 and then 3x3=9 and so on.
