The statement 'a correlational study is used to examine the relationship between two variables but cannot determine whether it is a cause-and-effect relationship" is true.
What is the correlation coefficient?The correlation coefficient describes how one variable moves in relation to another. A positive correlation indicates that the two move in the same direction, with a value of 1 denoting a perfect positive correlation. A value of -1 shows a perfect negative, or inverse, correlation, while zero means no linear correlation exists.
When examining the link between two variables, a correlational analysis cannot establish if there is a cause-and-effect relationship.
This assertion is absolutely accurate. The data can only be used to infer cause and effect relationships if a proper experiment has been conducted. A control group and a sample of participants drawn using random sampling techniques are required for the study to qualify as an experiment.
Therefore, the given statement is true.
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the annual income for independent sales representatives in the united states is thought to be highly right-skewed with a mean equal to $144,300 and a standard deviation of $32,450. given this information, if a sample of 36 independent sales representatives is selected, what is the probability that the mean of the sample will exceed $130,000?
Answer: $275,000
Step-by-step explanation:
Solve please for one two three and four please
2. A table of values is given below. Write the equation of the line.
tody
0 2
-8-8
y
-7
-8
-4
<-8
10
-8
Answer:-7
Step-by-step explanation:
Here is a scatter plot that compares hits to at bats for players on a baseball team.
Here is a scatter plot that compares hits to at bats for players on a baseball team, as the number of bats increase, the number of hits increases.
A scatter plot is also known as a scatter chart, scattergram, or XY graph. The scatter diagram plots numerical data pairings, one variable on each axis, to demonstrate their connection. Today everyone is wondering when to utilise a scatter plot.
Scatter plots are used in the following scenarios.
When we have numerical data that is paired
When there are several dependent variable values for a single independent variable value
In some instances, such as finding probable root causes of issues, evaluating if two items that appear to be connected both arise with the same precise reason, and so on.
The points will fall along a line or curve if the variables are correlated. The closer the points are to the line, the better the connection. One of the seven key quality tools is this cause examination tool.
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Please help will mark branliest
I will try to give brainliest
Jason and Adam are using a kit to build their own electronics board for a computer project. They use a scale drawing included in the instructions to help build the board.
Jason will use the scale factor to find the boards actual length and width and multiply those dimensions to find the boards area.
Adam says he knows another way. (The scale drawing of the electronics board: Scale factor: 5:1 lengthy ppm 50 cm width: 36 cm. Just imagine a square with those measurements.)
Answer the questions to show Adam could find the area of the scale drawing, and then use this strategy to find the area of the electronics board.
1. What is the area of the board shown on the scale drawing? ( the measurements I provided) Explain how you found the area.
2. How can Adam use the scale factor to find the area of the actual electronics board? Remember, he uses a different method than Jason.
3. What is the area of the actual electronics board?
Please help me, thank you. I will try to give brainliest
1)
The area of the electronic board on the scale drawing is 1800 cm².
2)
Using the scale factor 5:1.
Length:
1 = 50
5 = 250 cm
Width:
1 = 36 cm
5 = 180 cm
3)
The area of the actual electronic board is 45000 cm²
What is scale factor?A scale factor is defined as the ratio between the scale of a given original object and a new object,
We have,
Scale factor = 5 : 1
Now,
Electronic board dimensions:
Length = 50 cm
Width = 36 cm
Now,
Area of the electronic board on the scale drawing.
= length x width
= 50 x 36
= 1800 cm²
Now,
Actual dimensions:
Length = 250 cm _____(1)
Width = 180 cm _____(2)
Using the scale factor 5:1.
1 = 50
5 = 250 cm
And,
1 = 36 cm
5 = 180 cm
Area of the actual electronic board.
From (1) and (2)
= 250 x 180
= 45000 cm²
Thus,
The area of the electronic board on the scale drawing is 1800 cm².
The area of the actual electronic board is 45000 cm²
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What is the binary conversion of 2?
The binary conversion of 2 is 10.
In binary, there are only two possible digits, 0 and 1. Each digit in a binary number represents a power of 2, with the rightmost digit representing 2^0 (which is 1), the second digit representing 2^1 (which is 2), the third digit representing 2^2 (which is 4), and so on.
So in the binary number 10, the rightmost digit represents 2^0, which is 1, and the second digit represents 2^1, which is 2. Adding these two powers of 2 together gives a total value of 2 in binary.
To convert a decimal number to binary, you can divide the number by 2 and record the remainder at each step until the quotient is 0. Then, the binary number is simply the remainders read in reverse order. In this case, 2 divided by 2 is 1 with a remainder of 0, so the first digit of the binary number is 0. 1 divided by 2 is 0 with a remainder of 1, so the second digit of the binary number is 1. Therefore, the binary conversion of 2 is 10.
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Finally, Jade deployed her canopy and began descending at a constant rate of 40 meters every 5 seconds. It took her exactly 57 seconds to reach the ground. How can she determine how high above the ground she was when she deployed her canopy? i need this asap
Jade was 416 meters above the ground when she deployed her canopy.
What is kinematics?
kinematics, specifically the equation of motion for constant velocity, to solve the problem of finding the height above the ground when a person deploys their canopy while descending.
We can use the formula:
height = rate x time
To determine how high Jade was above the ground when she deployed her canopy. Let's denote the height she was at when she deployed her canopy as "h".
From the given information, we know that Jade descended at a constant rate of 40 meters every 5 seconds, so her rate of descent is 40/5 = 8 meters per second.
We also know that it took her exactly 57 seconds to reach the ground. Therefore, the time she spent descending with her canopy deployed is 57 - 5 = 52 seconds.
Using the formula, we can write:
h = 8 x 52
Simplifying this equation gives us:
h = 416
Hence, Jade was 416 meters above the ground when she deployed her canopy.
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Planes X and Y intersect at a right angle. Line A B and Line C G lie in plane X and do not intersect. Line R S lies in plane Y.
Vertical plane x intersects horizontal plane y. Line R S is horizontal on plane y. Lines A B and C G are vertical and beside each other on plane x. A right angle is indicated between the lines on the y plane and x plane. Lines A B and D G are parallel.
Which statements are true? Select three options.
The following statements are true:
Line AB and line CG are parallel.
Line CG and line RS are perpendicular.
Line segment CG lies in plane X.
What is a line segment?
A line segment is a section of a straight line that is enclosed by two clearly defined endpoints and contains every point on the line located within. The Euclidean distance between two ends of a line segment determines its length.
Here, we have
Given: Planes X and Y intersect at a right angle. Line A B and Line C G lie in plane X and do not intersect. Line R S lies in plane Y.
A) Line AB and Line CG are parallel: As both lines, AB and CG lie in plane X. Thus both are parallel and option A is the correct option.
B) Line AB and Line RS are parallel: As a line, AB lies in plane X and line RS lies in plane Y. Thus both are perpendicular and not parallel. Option B is the incorrect option.
C)Line CG and Line RS are perpendiculars: As line CG lies in plane x and line RS lies in plane Y. Thus both are perpendicular. Option C is the correct option.
D) Line AB and Line RS must intersect: line RS passes from the middle of plane Y and line AB passes from the left of plane X center. Thus they do not intersect each other. Option D is the incorrect option.
E) Line segment CG lies in plane X: As shown in the diagram, line CG lies in plane X. Thus option E is the correct option.
F) Line segment RS lies in plane X: As shown in the diagram, and the line lies RS in plane Y. Thus option F is the incorrect option.
Hence, The following statements are true:
Line AB and line CG are parallel.
Line CG and line RS are perpendicular.
Line segment CG lies in plane X.
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What is 4 Tablespoons (4Tbsp) in Cups (cup)?
A tablespoon is a volume measurement unit based on a piece of flatware (symbol: Tbsp). The value of 4 tablespoons is equivalent to 0.25 cups.
A metric tablespoon is exactly 15 mL, but a tablespoon in the United States is around 14.8 mL.
In both the imperial and American customary systems of measurement, a cup is a unit of volume.
250 millilitres is the definition of a metric cup.
There are 4.25 tablespoons in 0.25 cups (4 tbsp).
You may use the formula below to convert tablespoons to cups:
16 tablespoons make create a cup.
So, you may divide 4 by 16 to convert 4 tablespoons to cups:
4 tbsp / 16 tbsp/cup equals 0.25 cups.
Hence, 4 tablespoons are equal to 0.25 cups.
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Solve the system by substitution
-2x+ 7y = 15
6y=x
The solution to the system of equation is x = -2 and y = -3.
What is system of equations?System of equation can be solved using different method such as elimination method, graphical method and substitution method,
here we have,
Therefore, let's solve the system of equation by using substitution method.
-2x+ 7y = 15
6y=x
substitute the value of x in equation(i)
-2* 6y+ 7y = 15
or, -12y + 7y = 15
or, -5y = 15
or, y = -3
so, we get,
x = 6/ -3
or, x = -2
Hence, The solution to the system of equation is x = -2 and y = -3.
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How do you know when you have understood a math concept???????
what is chi square critical value
In statistics, the chi-square critical value is the threshold value that is used to determine whether the calculated chi-square test statistic is significant or not.
The chi-square critical value is determined based on the significance level (also known as alpha), which is the probability of rejecting the null hypothesis when it is true. The significance level is typically set at 0.05 or 0.01.
The chi-square critical value can be found using a chi-square distribution table or a statistical software program. The critical value is determined based on the degrees of freedom (df), which is the number of categories minus one.
Once the chi-square critical value is determined, it can be compared to the calculated chi-square test statistic to determine whether the test is statistically significant or not. If the calculated chi-square test statistic is larger than the critical value, we can reject the null hypothesis and conclude that there is a significant association between the variables.
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Anita bought her phone one year ago for $400, and she wants to eventually sell it to help pay for an upgrade. She checked the manufacturer's website and found that her phone is currently valued at $308, and it will continue to depreciate each year.
Write an exponential equation in the form y - a(b)* that can model the value of Anita's phone, y, × years after purchase.
Use whole numbers, decimals, or simplified fractions for the values of a and b.
Answer:
y= 400(0.77)^x
Step-by-step explanation:
The value decreases by 23% from,400 to 308 in 1 year. so if this continues then the equation would be y=400(0.77)^x.
The 0.77 comes from decaying 23%, meaning 1-0.23 = 0.77
this is just a quick addition to the good reply above by "varnanaik"
so she bought it for 400 bucks, but hell a year later went down to 308? Let's find the rate of depreciation
[tex]\qquad \textit{Amount for Exponential Decay} \\\\ A=P(1 - r)^t\qquad \begin{cases} A=\textit{current amount}\dotfill & \$ 308\\ P=\textit{initial amount}\dotfill &\$400\\ r=rate\to r\%\to \frac{r}{100}\\ t=years\dotfill &1 \end{cases}[/tex]
[tex]308 = 400(1 - \frac{r}{100})^{1} \implies \cfrac{308}{400}=1-\cfrac{r}{100}\implies \cfrac{77}{100}=\cfrac{100-r}{100} \\\\\\ 77=100-r\implies r+77=100\implies r=\stackrel{ \% }{23} \\\\[-0.35em] ~\dotfill\\\\ A=400(1-\frac{23}{100})^x\implies A=400(1-0.23)^x\implies {\Large \begin{array}{llll} A=400(0.77)^x \end{array}}[/tex]
A system of equations is shown below.
y=2/3x−5
y=1/2x+3
How many solutions does the system have?
A.2 solutions
B.no solutions
C.infinite solutions
D.1 solution
The solution to the system is (x,y) = (48,19).
To find the solutions to the system of equations, we need to find the values of x and y that satisfy both equations simultaneously. One way to do this is to set the two expressions for y equal to each other and solve for x:
2/3x−5 = 1/2x+3
Multiplying both sides by 6 (the least common multiple of 3 and 2) to clear the fractions, we get:
4x - 30 = 3x + 18
Simplifying, we get:
x = 48
Now that we know x, we can substitute it into either of the original equations to find the corresponding value of y. Let's use the first equation:
y = 2/3(48) - 5 = 19
So the solution to the system is (x,y) = (48,19).
Since there is exactly one solution, the answer is (D) 1 solution.
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in 2004,Kenenisa Bekele of ethiopia ran 5,000 meters in 12 minutes, 37.35
what is this distance to the nearest tenth of a mile
In 2004, as per the run, the distance to the nearest tenth of a mile is 3.11 miles.
The distance that Kenenisa Bekele of Ethiopia ran in 2004 is equal to 5,000 meters, which is equivalent to 3.11 miles to the nearest tenth of a mile. To calculate this distance, you can use a simple conversion formula.
To convert meters to miles, you need to divide the number of meters by 1609.34.
In this case, we would divide 5,000 meters by 1609.34, which gives us 3.11 miles.
=> 5000/ 1609.34 = 3.11 miles.
This is the total distance that Kenenisa Bekele ran in 2004 to the nearest tenth of a mile.
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The equation for line j can be written as y+5=5(x+5). Line k includes the point (5,3) and is perpendicular to line j. What is the equation of line k?
Therefore , the solution of the given problem of equation comes out to be y = (-1/5)x + 4 is the required equation.
How do equations work?The equivalent sign (=) is used in arithmetic equations to signify the equality of two propositions. It is shown that it is possible to compare various numerical factors by using mathematical techniques, which have served as manifestations of reality. For instance, the equal sign divides the number 12 even the solution y + 6 = 12 in two distinct portions. How many characters also are present from either end of such a character can be calculated. Conflicting symbol readings are prevalent.
Here,
The given equation of line j is y+5=5(x+5) which can be rewritten in slope-intercept form as y = 5x + 20.
Since line k is perpendicular to line j, the slope of line k will be the negative reciprocal of the slope of line j. The slope of line j is 5, so the slope of line k will be -1/5.
We are also given that line k includes the point (5,3). We can use this point and the slope of line k to find the equation of line k using point-slope form:
y - 3 = (-1/5)(x - 5)
Simplifying and rearranging, we get:
y = (-1/5)x + 4
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x/6 - 6 = x/18 + 6, what value of x makes the equation true?
Answer:
x = 108
Step-by-step explanation:
To solve the equation x/6 - 6 = x/18 + 6, we first need to get rid of the fractions by multiplying both sides by the least common multiple of the denominators, which in this case is 18.
So, we have:
18(x/6 - 6) = 18(x/18 + 6)
Simplifying this, we get:
3x - 108 = x + 108
Next, we want to isolate the variable x on one side of the equation, so we'll subtract x from both sides:
2x - 108 = 108
Finally, we'll add 108 to both sides to get:
2x = 216
Dividing both sides by 2, we get:
x = 108
Therefore, the value of x that makes the equation true is 108.
Given h(x) = -5x – 5, solve for x when h(x) = 0. answer
Answer: -5
h(0) = -5(0) - 5
h(0) = -5
Factorise the following:
a) x² + 6x +9
b) x² - 6x + 8
c) x² - 4x - 32
d) x² + x-42
On factorizing each equation we get
a) x² + 6x + 9 = (x + 3) (x + 3)
b) x² - 6x + 8 = (x - 4) (x - 2)
c) x² - 4x - 32 = (x - 8) (x + 4)
d) x² + x - 42 = (x + 7) (x - 6)
FactorizationFactorization is the process of finding the factors of an expression or number. In algebra, factorization involves expressing an algebraic expression as a product of its factors.
To factorize the following split the middle term and group out the common factors as given below.
Here we have four equations that can be factorized as follows
a) x² + 6x + 9
=> x² +3x + 3x + 9 [ Split middles term ]
=> x(x + 3) +3(x + 3) [ Grouping the terms ]
=> (x + 3) (x + 3)
∴ a) x² + 6x + 9 = (x + 3) (x + 3)
b) x² - 6x + 8
=> x² - 4x - 2x + 8 [ Split middles term ]
=> x(x - 4) -2(x - 4) [ Grouping the terms ]
=> (x - 4) (x - 2)
∴ x² - 6x + 8 = (x - 4) (x - 2)
c) x² - 4x - 32
=> x² - 8x + 4x - 32 [ Split middles term ]
=> x(x - 8) + 4(x - 8) [ Grouping the terms ]
=> (x - 8) (x + 4)
∴ x² - 4x - 32 = (x - 8) (x + 4)
d) x² + x - 42
=> x² + 7x - 6x - 42 [ Split middles term ]
=> x(x + 7) - 6(x + 7) [ Grouping the terms ]
=> (x + 7) (x - 6)
∴ x² + x - 42 = (x + 7) (x - 6)
Therefore,
On factorizing each equation we get
a) x² + 6x + 9 = (x + 3) (x + 3)
b) x² - 6x + 8 = (x - 4) (x - 2)
c) x² - 4x - 32 = (x - 8) (x + 4)
d) x² + x - 42 = (x + 7) (x - 6)
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Membership at the Lose for Less Gym requires new members to pay an
enrollment fee of $79. 95 and purchase a key card for $19. 95, in addition to
the regular monthly fee of $24. 95.
Write an equation that represents the cost C for membership for m months.
What is the cost of a 2-year membership?
$1,157. 55
$698. 70
$678. 75
$2,422. 55
What is weight of gallon of water?
The weight of gallon of water is 8.345 pounds according to density of water.
The gallon is a unit of volume and we need to find the weight of one gallon of water. So, the weight and volume are related to each other by the formula -
Density = mass/volume
Now, we know the volume and need the density of water in pounds per gallon.
The density of water is 8.345 pounds per gallon.
So, keeping the values in formula
Mass = density × volume
Mass = 8.345 × 1
Performing multiplication on Right Hand Side of the equation
Mass = 8.345 pounds
The weight of water is 8.345 pounds.
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Jessica rode her bicycle 128 miles in 8 weeks, riding the same distance each week. Pablo rode his bicycle 95 miles in 5 weeks, riding the same distance each week. Which statement correctly compares the number of miles per week they rode?
Answer:
Jessica rode her bike 16 miles per week and Pablo rode his bike 17 miles per week.
Step-by-step explanation:
Answer:
Jessica's and Pablo's statement both are correctly comparing the number of miles they rode per week.
Step-by-step explanation:
You are told that Jessica rode her bicycle for 128 miles in 8 weeks and equally the same distance each week.
Therefore you can easy tell how much she rode her bicycle for 8 weeks by dividing 128 by 8 which is 16miles per week
While in Pablo's statement tell us the same as Jessica's statement since you can divide it like Jessica's statement 95 divided by 5 equals 19miles per week
Am I a function? Explain how you know it is or isn't a function.
Answer:
Function.
Step-by-step explanation:
This graph is a function because all points on the line are different and do not intersect. (vertical line test)
Hope it helped!
y = 40x + 50 graph it
if you deposit $5500 in an Account that pays 1.356% annual interest
a find the balance when the compounded interest is quarterly
b find the balance when the compounded interest is monthly
A ) The balance would be approximately $5562.35 when the interest is compounded quarterly.
B) The balance would be approximately $5565.09 when the interest is compounded monthly.
What is annual interest?
Annual interest rate refers to the interest rate over a period of one year with the assumption that the interest is compounded every year.
a) If the interest is compounded quarterly, we can use the formula:
A = P(1 + r/n)^(n*t)
where
A is the balance P is the principal (the initial deposit)r is the interest rate (as a decimal)n is the number of times the interest is compounded per year t is the number of yearsIn this case, P = $5500, r = 0.01356 (1.356% as a decimal), n = 4 (since interest is compounded quarterly), and t = 1 (since we are calculating the balance after one year).
Substituting these values into the formula, we get:
A = $5500(1 + 0.01356/4)^(4*1) ≈ $5562.35
So the balance would be approximately $5562.35 when the interest is compounded quarterly.
b) If the interest is compounded monthly, we can use the same formula, but with n = 12 (since interest is compounded monthly):
A = $5500(1 + 0.01356/12)^(12*1) ≈ $5565.09
So the balance would be approximately $5565.09 when the interest is compounded monthly.
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Two supplementary angles differ by 34. Find the angles
107+73 = 180
107-73 = 34
========================================================
Explanation
Rule: Supplementary angles always add to 180 degrees.
x+y = 180 is one equation to set upx-y = 34 is the other equation since the angles differ by 34 degrees. It's implied here that x > y.This is our system of equations.
[tex]\begin{cases}x+y = 180\\x-y = 34\\\end{cases}[/tex]
Add the equations straight down.
x+x = 2xy+(-y) = 0y = 0, so the variable y goes away180+34 = 214After the y terms go away, we have this new equation: 2x = 214 which solves to x = 107 after dividing both sides by 2.
Then use this x value to find y
x+y = 180
107+y = 180
y = 180-107
y = 73
Or you could say
x-y = 34
107-y = 34
-y = 34-107
-y = -73
y = 73
Either way, we get the same y value each time. This helps confirm the answer.
Another way to confirm the answer is shown in the next section below.
---------------------
Check:
x+y = 180
107+73 = 180
180 = 180 .... confirms the 1st equation
x-y = 34
107-73 = 34
34 = 34 ... the other equation is confirmed.
In short,
107+73 = 180107-73 = 34Two softball players are practicing catching fly balls. One player throws a ball to the other and the path of the softball is modeled by the equation [tex]h=-4t^{2}+40t+5.5[/tex] where h is the height (in feet) of the softball and t is time in seconds that have elapsed.
the questions are in the pictures
The number of seconds that the ball isat its maximum height is 5 seconds.
How to calculate the number of secondsIt should be noted that to find the time at which the softball is at its maximum height, we need to find the vertex of the parabolic equation h = -4t^2 + 40t + 5.5.
The vertex of a parabola of the form h = at^2 + bt + c is given by the formula t = -b / (2a).
In this case, a = -4 and b = 40, so the time at which the ball reaches its maximum height is:
t = -b / (2a) = -40 / (2*(-4)) = 5 seconds.
Therefore, the ball is at its maximum height after 5 seconds.
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Two softball players are practicing catching fly balls. One player throws a ball to the other and the path of the softball is modeled by the equation h = -4t2 +40t +5.5, where h is the height (in feet) of the softball and is the time in seconds that have elapsed. b
After how many seconds is the ball at its maximum height?
pls help me solve theseee i’ll mark brainliest
The scale factor of the dilation that takes P to Q is,
⇒ 4/5
What is Division method?Division method is used to distributing a group of things into equal parts. Division is just opposite of multiplications. For example, dividing 20 by 2 means splitting 20 into 2 equal groups of 10.
Given that;
⇒ Quadrilateral P and Q are similar.
Hence, The scale factor of the dilation that takes P to Q is,
⇒ 2 / 2.5
⇒ 20 / 25
⇒ 4/5
Thus, The scale factor of the dilation that takes P to Q is, 4/5.
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Find g.
60°
6 km
9
30°
Write your answer in simplest radical form.
kilometers
Answer:
4√3 or 6.9282Km
Step-by-step explanation:
Let the triangle be ABC, right angled at B
Angle A = 60 degrees
Angle C = 30 degrees
BC = 6 km
To find AB,
Tan30°=AB/BC
Now we know that tan30° is 1/√3 so,
1/√3 = AB / 6
6/√3 = AB
6√3/3 =AB
2√3 = AB
Now we have the value of two sides so we can use the Pythagoras Theorem to find the hypotenuse, which is g
AB² + BC² = AC²
(2√3)² + 6² = g²
12 + 36 = g²
48 = g²
Therefore g = √48km or 4√3km or 6.9282Km