Answer:
length of base = 17 cm
Step-by-step explanation:
Area of a triangle A = 1/2 bh where b = base h = height
We are given
b = 2h - 7
A = 102
or
2h = b + 7
h = (b+7) /2
use this in the equation for A
1/2 (b) (b+7)/2 = 102
1/4 x b(b+7) = 102
b(b+7) = 4 x 102
b² + 7 b = 408
b² + 7b - 408 = 0
This is a quadratic equation which can be solved by factoring or using the quadratic formula
We can factor b² + 7b - 408 as follows
Find factors u, v of -408 (one factor positive, the other negative)See which of these factors will add(or subtract) to 7Factors of -408 areCheck if b = 17 is correct
With b = 17
h = (b+7) /2
= (17 + 7)/2
= 24/2
= 12
Therefore A = 1/2 x 17 x 12
= 17 x 6
= 102
What is the length of jg? 4 units 5 units 6 units 9 units
The length of JG is 5 units if ∠EDH ≅ ∠EDG. Thus option b is the correct answer as per the given relation.
The Given data is as follows:
∠EDH ≅ ∠EDG
Here in the question it is given that, ∠EDH is similar to ∠EDG
The corresponding sides of two triangles are congruent are similar to each other.
EH=9, EJ=4.
EH = EG
EG = 9 -------equation(1)
EG = EJ+JG
EG = 4+JG -------equation(2)
From equations 1 and 2, we get
9 = 4 + JG
9 - 4 = JG
JG = 5 units
Therefore, we can conclude that the length of JG is 5 units.
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The complete question is-
In circle D, ∠EDH ≅ ∠EDG. What is the length of JG?
a. 4 units
b. 5 units
c. 6 units
d. 9 units
Answer: 5
Step-by-step explanation:
∠EDH ≅ ∠EDG, EH=9, EJ=4.Corresponding sides of two triangles are congruent. (CPCTC) .... (1)From the given figure it is clear that ... (2)Using (1) and (2), we getSubtract 4 from both the sides.
The equation 2 = (1.01)* models a population that has doubled. What is the rate of increase? What does x represent?
The rate of increase is 1% and the variable x represents when the population will double
Calculating the rate of increaseThe rate of increase is determined by the value of the exponent x. In this case, x represents the number of years that have passed since the population was at its initial value.
The exponent x increases by 1 for each year that passes, indicating that the population is increasing by a factor of 1.01 each year.
Therefore, the rate of increase is 1%, or 0.01 as a decimal.
What does x represent?The variable x represents when the population will double
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For the following exercises, find the function if sint=x+1x. cost 44. sect cott 46. cos(sin−1(x+1x)) 47. tan−1(2x+1x) For the following exercises, simplify the first trigonometric expression by writing the simplified form in terms of the second expression. 16. cscxtanx+cotx;cosx 17. 1+tanxsecx+cscx;sinx 18. 1+sinxcosx+tanx;cosx 19. sinxcosx1−cotx;cotx For the following exercises, verify the identity. 29. cosx−cos3x=cosxsin2x 30. cosx(tanx−sec(−x))=sinx−1 31. cos2x1+sin2x=cos2x1+cos2xsin2x=1+2tan2x 32. (sinx+cosx)2=1+2sinxcosx 33. cos2x−tan2x=2−sin2x−sec2x For the following exercises, determine whether the identity is true or false. If false, find an appropriate equivalent expression. 40. 1−tan2θcos2θ−sin2θ=sin2θ 41. 3sin2θ+4cos2θ=3+cos2θ 42. cotθ+cosθsecθ+tanθ=sec2θ
44. cos(x+1x)
46. sec(x+1x)
47. tan−1(2x+1x)
16.cscxcosx+cotx
17.1+sinx
18.1+cosx
19. cotx−1
29. True
30 True
31. True
32. True
33. True
40. False. The equivalent expression is sin2θ−1+tan2θcos2θ
41. False. The equivalent expression is 3sin2θ+4cos2θ−3
42. False. The equivalent expression is cotθ+cosθsecθ+tanθ−sec2θ
For the following exercises, find the function if sint=x+1x:
cos 44: cos(x+1x)sec cott 46: sec(x+1x)cos(sin−1(x+1x)) 47: cos(sin−1(x+1x))tan−1(2x+1x) 47: tan−1(2x+1x)For the following exercises, simplify the first trigonometric expression by writing the simplified form in terms of the second expression:
16. cscxtanx+cotx;cosx: cscxcosx+cotx17. 1+tanxsecx+cscx;sinx: 1+sinx18. 1+sinxcosx+tanx;cosx: 1+cosx19. sinxcosx1−cotx;cotx: cotx−1For the following exercises, verify the identity:
29. cosx−cos3x=cosxsin2x: True.30. cosx(tanx−sec(−x))=sinx−1: True.31. cos2x1+sin2x=cos2x1+cos2xsin2x=1+2tan2x: True.32. (sinx+cosx)2=1+2sinxcosx: True.33. cos2x−tan2x=2−sin2x−sec2x: True.For the following exercises, determine whether the identity is true or false. If false, find an appropriate equivalent expression:
40. 1−tan2θcos2θ−sin2θ=sin2θ: False. The equivalent expression is sin2θ−1+tan2θcos2θ.41. 3sin2θ+4cos2θ=3+cos2θ: False. The equivalent expression is 3sin2θ+4cos2θ−3.42. cotθ+cosθsecθ+tanθ=sec2θ: False. The equivalent expression is cotθ+cosθsecθ+tanθ−sec2θ.Learn more about Trigonometry
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why does tangent function have asymptotes when sine and cosine fjnction have none ?
The tangent function has asymptotes because it is defined as the ratio of the sine and cosine
Why does tangent function have asymptotes?The tangent function has asymptotes because it is defined as the ratio of the sine and cosine functions:
tan(x) = sin(x) / cos(x)
When the cosine function approaches zero, the denominator of the tangent function becomes very small, and the tangent function grows to infinity or negative infinity. Therefore, the tangent function has vertical asymptotes where the cosine function is equal to zero.
In contrast, the sine and cosine functions do not have vertical asymptotes because they are periodic functions that oscillate between -1 and 1. They do have horizontal asymptotes at positive and negative infinity, but these are not vertical asymptotes.
Note that the tangent function is not defined at the points where the cosine function is equal to zero because the division by zero is undefined. This also contributes to the existence of the vertical asymptotes in the tangent function.
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sampling refers to a method to select a subset of individuals for the sample from the population so that each has an equal chance of being assigned to the various study conditions. a. random b. snowball c. stratified d. convenience
Random sampling is the correct answer. Which is option (A).
Sampling refers to a method to select a subset of individuals for the sample from the population so that each has an equal chance of being assigned to the various study conditions is referred to as Random sampling.
What is sampling?
In statistics, sampling is the selection of a subset of individuals from within a statistical population to estimate characteristics of the whole population. Sampling is frequently employed in social science research. The method employed to select a subset of individuals for the sample from the population so that each has an equal chance of being assigned to the various study conditions is known as random sampling.
Content-loaded sampling refers to a form of sampling that is more sophisticated than simple random sampling.
In order to form a sample, it involves first determining which variables (or characteristics) are essential to the study, and then choosing people based on those variables, hence the name "content-loaded."On the other hand, in Stratified sampling, the population is divided into subgroups (strata) based on one or more characteristics that are expected to impact the study's outcomes. The proportion of people chosen from each group should reflect the group's percentage of the overall population.
Snowball sampling is a method for selecting a sample of individuals by locating others who share the characteristics being studied and asking them to suggest additional individuals who might participate in the study. Among the given options, (A) random sampling is the correct answer.
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Thank you so much for answering this!!!
If x^7=2.5, then what is x^14?
Answer:
6.25
Step-by-step explanation:
The diagram shows the graph of y = f(x) for -3.5 ≤ x ≤ 1.5
Find fg(-3)
From the graph and the given information, the value of the given function, fg(-3), is 9
Evaluating a functionFrom the question, we are to determine the value of the function, fg(-3).
First , we will determine the value of g(-3)
From the given information,
g(x) = 1/(2 + x)
Substitute x = -3 in the function to determine the value of g(-3)
g(-3) = 1/(2 + (-3))
g(-3) = 1/(2 - 3)
g(-3) = 1/-1
g(-3) = -1
Now,
fg(-3) = f(g(-3))
Thus,
fg(-3) = f(-1)
Now, we will determine the value of f(-1) from the given graph.
From the graph, we can read that the value of f(-1) is 9
Hence,
The value of fg(-3) is 9
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Mr. Phillips is mixing paint for his art class. How many 6-ounce bottles of paint can he fill with the quantities of pain. 64 ounces of blue
12 ounces of yellow
32 ounces
Mr. Phillips can fill 10 bottles of paint with the 64 ounces of blue paint and five bottles of paint with the 12 ounces of yellow paint, for a total of fifteen 6-ounce bottles.
He has 64 ounces of blue paint and 12 ounces of yellow paint. In order to figure out how many 6-ounce bottles of paint he can fill with the quantities of pain, he must divide the amount of paint by the size of the bottles. For the blue paint, he needs to divide 64 ounces by 6 ounces, which will equal 10.6 (rounded down to 10). For the yellow paint, he needs to divide 12 ounces by 6 ounces, which will equal 2 (rounded up to 3). This means that he can fill 10 bottles of paint with the 64 ounces of blue paint and three bottles of paint with the 12 ounces of yellow paint, for a total of thirteen 6-ounce bottles. The process of figuring out how many bottles of paint can be filled with the given amounts of paint is a simple one. It requires the painter to divide the amount of paint by the size of the bottles. Once the painter knows the answer, they can use it to accurately fill the appropriate number of bottles for their project. This is an important skill for a painter to have as it helps them plan for the necessary supplies and create a successful project.
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Write an exponential function that passes through (0,3) and (1,6). Write your answer in the form f(x) = ab^x
The exponential function that passes through (0,3) and (1,6) is [tex]f(x) = 3(2^{x})[/tex]
What is the exponential function?An exponential function is a mathematical function in which an independent variable appears in the exponent. In other words, the function has the form f(x) = [tex]a^{x}[/tex], where 'a' is a constant greater than 0 and not equal to 1, and 'x' is the independent variable.
To find the exponential function that passes through (0,3) and (1,6), we need to determine the values of 'a' and 'b' in the function [tex]f(x)=a(b^{x})[/tex].
First, we can use the point (0,3) to find the value of 'a'. Plugging in x=0 and y=3, we get:
3 = [tex]ab^0[/tex]
3 = a
Next, we can use the point (1,6) to find the value of 'b'. Plugging in x=1 and y=6, we get:
6 = [tex]ab^1[/tex]
6 = 3b
b = 2
Now that we have the values of 'a' and 'b', we can write the exponential function in the form [tex]f(x)=a(b^{x})[/tex]. Substituting 'a' and 'b' into the equation, we get: [tex]f(x) = 3(2^{x})[/tex]
Therefore, the exponential function that passes through (0,3) and (1,6) is [tex]f(x) = 3(2^{x})[/tex]
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In one lottery, a player wins the jackpot by matching all five distinct numbers drawn in any order from the white balls (1 through ) and matching the number on the gold ball (1 through ). If one ticket is purchased, what is the probability of winning the jackpot?
Answer: The total number of possible outcomes in the lottery can be calculated by finding the number of ways to choose 5 distinct numbers out of 70, and then multiply that by the number of possible choices for the gold ball (1 out of 25). So:
Total number of outcomes = (70 choose 5) * 25 = 25,989,600
To win the jackpot, the player must match all 5 white ball numbers and the gold ball number. The number of ways to do this is simply 1, since there is only one winning combination.
Therefore, the probability of winning the jackpot with a single ticket is:
Probability of winning = (number of winning outcomes) / (total number of outcomes) = 1 / 25,989,600
So the probability of winning the jackpot with a single ticket is approximately 0.00000003846, or 1 in 25,989,600.
Step-by-step explanation:
If the company orders 27 boxed lunches from a deli for $245. 70 and each boxed lunch costs the same amount then the unit cost of each boxed lunched is $9. 1. What is the unit cost of each boxed lunch?
Given that;
27 boxed lunches from a deli cost $245. 70
Cost of 1 box = ?
To determine the unit cost of each
If the company orders 27 boxed lunches from a deli for $245.70 and each boxed lunch costs the same amount then the unit cost of each boxed lunch is $9.1.
This example belongs to a word problem.
What is the unit cost of each boxed lunch?
Given that;
27 boxed lunches from a deli cost $245.70
Cost of 1 box =?
To determine the unit cost of each boxed lunch, we say;
Cost of each box = $245.70 ÷ 27
Cost of each box = $9.1
Hence, if the company orders 27 boxed lunches from a deli for $245.70 and each boxed lunch costs the same amount then the unit cost of each boxed lunch is $9.1
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what are some issues you must consider when choosing the appropriate number of treatment conditions for your experiment? what does it mean to have conditions that are proportional to each other?
When selecting the appropriate number of treatment conditions, it is essential to consider factors such as resources, research complexity, and confounding variables.
Having conditions that are proportional to each other means that the level or intensity of each condition varies in direct proportion to the others, such that if one condition is increased or decreased, the others are also adjusted in a corresponding manner.
When choosing the appropriate number of treatment conditions for an experiment, there are several issues to consider. One of these is the ability to distinguish differences between treatment conditions.
A suitable number of treatment conditions for an experiment should be able to identify important differences between them. If there are too few treatment conditions, differences may not be identified, while if there are too many treatment conditions, resources may be wasted, making it difficult to obtain meaningful results.Another factor to consider is the need for replicability. The more treatment conditions that are used, the more difficult it is to replicate the experiment. A suitable number of treatment conditions should allow for replicability, meaning that the experiment can be repeated with similar results.To have proportional treatment conditions means that the levels of the independent variable (the treatment) are proportionate. This means that the differences between the levels of the independent variable are proportional to each other. This is important because it ensures that the treatment conditions are balanced and that the results obtained are valid. If the levels of the independent variable are not proportional, it can be difficult to interpret the results and draw conclusions.Having conditions that are proportional to each other means that the differences between treatment conditions are consistent across all levels of the independent variable. In other words, if the independent variable increases by a certain amount, the difference between the treatment conditions remains constant. This can be important for ensuring that the treatment effects are interpretable and generalizable to other populations.
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A cone of radius rcm and height 3rcm is removed from a cone of radius 10 cm and height 30 cm to give a frustum. The volume of the frustum is 2855 cm³ Calculate the value of r. Show all your working.
If the volume of the frustum is 2855 cm³ and the value of r = 28.4
What is a cone?A cone is a three-dimensional shape in geometry that narrows smoothly from a flat base (usually circular base) to a point called the apex or vertex.
Volume of the = (1/3*п*R²*H) + 1/3*п*r²*h
2855 = 1/3*22/7*10*30 + 1/3*22/7*r²*3
2855 = 314.3 + 66r²/21
2540.7 *21= 66r²
53354.7 = 66r²
r² = 808.4
r √808.4
Therefore the value of r = 28.4
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The value for 4/m+1 at m=1
Answer:
5 is the answer
Step-by-step explanation:
Joe ran 10 kilometers in 5 hours. what is joe’s unit rate
Answer:
2 kph
Step-by-step explanation:
10 kilometers in 5 hours.
1 hour = ?
10/5 = 2 Kilometers
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factorise 4px-3my-2pm-6xy
Answer:
E
Step-by-step explanation:
NO
Can someone help me with this? I dont know whats its trying to ask. It decreases by 1/2 every year. URGENT
Answer:
Below
Step-by-step explanation:
Year 0 = 800
Year 1 = 400
Year 2 = 200
Year 3 = 100
Year 4 = 50
Year 5 = 25
From year 2 to year 4 = 150 dollars decrease in 2 years = 75 dollars per year
this is just a quick addition to "jsimpson11000" good reply above
so we know the decrease is exponential, that means we have an equation about V = abᵗ, now, hmmm who knows what "ab" is, now, once we know that, then we can get the "slope" from t=2 to t=4, so let's use the table to get it.
[tex]{\Large \begin{array}{llll} V=ab^t \end{array}} \\\\[-0.35em] ~\dotfill\\\\ \begin{cases} t=3\\ V=100 \end{cases}\implies 100=ab^3 \\\\[-0.35em] ~\dotfill\\\\ \begin{cases} t=5\\ V=25 \end{cases}\implies 25=ab^5\implies 25=ab^3b^2\implies \stackrel{\textit{substituting from above}}{25=(100)b^2} \\\\\\ \cfrac{25}{100}=b^2\implies \cfrac{1}{4}=b^2\implies \sqrt{\cfrac{1}{4}}=b\implies \boxed{\cfrac{1}{2}=b} \\\\[-0.35em] ~\dotfill[/tex]
[tex]100=ab^3\implies 100=a\left( \cfrac{1}{2} \right)^3\implies 100=\cfrac{a}{8}\implies \boxed{800=a} \\\\\\ ~\hfill {\Large \begin{array}{llll} V=800\left( \frac{1}{2} \right)^t \end{array}}~\hfill[/tex]
now let's find the slope
[tex]\begin{array}{llll} f(x)~from\\\\ x_1 ~~ to ~~ x_2 \end{array}~\hfill slope = m \implies \cfrac{ \stackrel{rise}{f(x_2) - f(x_1)}}{ \underset{run}{x_2 - x_1}}\impliedby \begin{array}{llll} average~rate\\ of~change \end{array} \\\\[-0.35em] ~\dotfill\\\\ V(t)= 800\left( \frac{1}{2} \right)^t\qquad \begin{cases} t_1=2\\ t_2=4 \end{cases}\implies \cfrac{V(4)-V(2)}{4 - 2} \\\\\\ \cfrac{(50)~~ - ~~(200)}{2}\implies \text{\LARGE -75}[/tex]
so is a negative slope, because is Decay or decrement, however you're expected to enter it as positive, so in essence just the absolute value change.
A farmer pays $50 to rent a booth at a farmers market. She is selling watermelons for $8 each. At the end of the day, she wants to have earned at. least $200 after she pays to rent the booth. How many watermelons does the farmer need to sell?
Answer:
Let x be the number of watermelons the farmer needs to sell to earn at least $200.
The amount of money earned from selling x watermelons is 8x dollars.
After paying $50 to rent the booth, the farmer's profit is 8x - 50 dollars.
The problem states that the farmer wants to earn at least $200, so we can set up the following inequality:
8x - 50 ≥ 200
Adding 50 to both sides, we get:
8x ≥ 250
Dividing both sides by 8, we get:
x ≥ 31.25
Since the number of watermelons must be a whole number, the farmer needs to sell at least 32 watermelons to earn at least $200 after paying for the booth.
write the variable and constant for the expression : 2x+1
Answer:
Step-by-step explanation:
variable means we can put any value to it.
the variable is 2x
the constant is +1
Find the measure of x. 8 62° X x = [?]
Answer:
x ≈ 17
Step-by-step explanation:
using the cosine ratio in the right triangle
cos62° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{8}{x}[/tex] ( multiply both sides by x )
x × cos62° = 8 ( divide both sides by cos62° )
x = [tex]\frac{8}{cos62}[/tex] ≈ 17 ( to the nearest whole number )
Adam drove to his grandmother's house 24 miles away.
How many meters did Adam drive?
Answer:
Step-by-step explanation:
1 mile = 1609 meters
24 miles = 38624 meters
So, Adam drives 38624 meters.
The Blacktop Speedway is a supplier of automotive parts. Included in stock are 12 speedometers that are correctly calibrated and two that are not. Three speedometers are randomly selected without replacement. Let the random variable z represent the number that are not correctly calibrated Complete the probability distribution table. (Report probabilities accurate to 4 decimal places.) P(x) N 3 3 Find the mean of this probability distribution. (Appropriate rounding rules apply.) mean = Submit Question
The mean of the given probability distribution is 0.2007.
The probability distribution table for the given scenario can be completed as follows:
| x | P(x) |
|---|------|
| 0 | 0.8036 |
| 1 | 0.1929 |
| 2 | 0.0036 |
| 3 | 0.0000 |
The probabilities are calculated using the hypergeometric distribution formula:
P(x) = (C(N-K, n-x) * C(K, x)) / C(N, n)
Where N is the total number of items (14), K is the number of items that are not correctly calibrated (2), n is the number of items selected (3), and x is the number of items that are not correctly calibrated in the selection.
For x = 0:
P(x) = (C(14-2, 3-0) * C(2, 0)) / C(14, 3) = (C(12, 3) * C(2, 0)) / C(14, 3) = (220 * 1) / 364 = 0.8036
For x = 1:
P(x) = (C(14-2, 3-1) * C(2, 1)) / C(14, 3) = (C(12, 2) * C(2, 1)) / C(14, 3) = (66 * 2) / 364 = 0.1929
For x = 2:
P(x) = (C(14-2, 3-2) * C(2, 2)) / C(14, 3) = (C(12, 1) * C(2, 2)) / C(14, 3) = (12 * 1) / 364 = 0.0036
For x = 3:
P(x) = (C(14-2, 3-3) * C(2, 3)) / C(14, 3) = (C(12, 0) * C(2, 3)) / C(14, 3) = (1 * 0) / 364 = 0.0000
The mean of this probability distribution can be calculated by multiplying each value of x by its corresponding probability and summing the results:
mean = (0 * 0.8036) + (1 * 0.1929) + (2 * 0.0036) + (3 * 0.0000) = 0.2007
Therefore, the mean of this probability distribution is 0.2007.
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ABCE is a trapezium
AD is parallel to BC
DE = 4cm
Area of ABCE = 60cm^2
Area of ABCD = 48cm^2
Work out the values of f and g
The values of f and g that has been worked out is given as 6 and 8
How to solve the trapeziumThis is a question that would examine the combination of two shapes into one.
We have area of a triangle = base * height / 2
this would give
f * 4 / 2 = 60 - 48
2f = 12
divide through by 2
f = 12 / 2
f = 6
we have f * g = 48
given that the value of f = 6
g * 6 = 48
6g = 48
Divide through by 6 to get the value of f
6 g / 6 = 48 / 6
g = 8
Hence the value of f is given as 6 and the value of g is given as 8
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researchers are testing a new diagnostic tool designed to identify a certain condition. the null hypothesis of the significance test is that the diagnostic tool is not effective in detecting the condition. for the researchers, the more consequential error would be that the diagnostic tool is not effective, but the significance test indicated that it is effective. which of the following should the researchers do to avoid the more consequential error? responses increase the significance level to increase the probability of type i error. increase the significance level to increase the probability of type 1 error. increase the significance level to decrease the probability of type i error. increase the significance level to decrease the probability of type 1 error. decrease the significance level to increase the probability of type i error. decrease the significance level to increase the probability of type 1 error. decrease the significance level to decrease the probability of type i error. decrease the significance level to decrease the probability of type 1 error. decrease the significance level to decrease the standard error.
To decrease the probability of type I error in order to avoid the more consequential error of falsely concluding that the diagnostic tool is effective.
The researchers should decrease the significance level to decrease the probability of type I error. This is because a type I error occurs when the null hypothesis is rejected when it is actually true. In this case, the null hypothesis is that the diagnostic tool is not effective in detecting the condition.
If the researchers decrease the significance level, they are decreasing the probability of making a type I error, which means they are less likely to conclude that the diagnostic tool is effective when it is actually not. This will help the researchers avoid the more consequential error of falsely concluding that the diagnostic tool is effective.
In general, the significance level (also known as the alpha level) is the probability of making a type I error. By decreasing the significance level, the researchers are making the criteria for rejecting the null hypothesis more stringent, which reduces the likelihood of making a type I error.
It is important to note that decreasing the significance level will also decrease the power of the test, which is the probability of correctly rejecting the null hypothesis when it is false.
However, in this case, the researchers are more concerned with avoiding the more consequential error of falsely concluding that the diagnostic tool is effective, so decreasing the significance level is the appropriate action to take.
In conclusion, the researchers should decrease the significance level to decrease the probability of type I error in order to avoid the more consequential error of falsely concluding that the diagnostic tool is effective.
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Which equation forms a line that is perpendicular to y = 3x + 4?
A. y = 3x + 6
B. y = -3x + 4
C. y = -1/3x + 2
Answer:
The answer will be B. y= -3x +6
What is one example of math in mr. Maxs life outside the classroom
Here some examples of math by using Mr. Maxs life outside the classroom.
Define the examples of math?One example of math in Mr. Max's life outside the classroom could be calculating the amount of gas needed to fill up his car's tank before a road trip. This involves using basic arithmetic operations such as addition, subtraction, multiplication, and division to calculate the total distance he intends to travel, the fuel efficiency of his car, and the capacity of the fuel tank. By doing so, he can estimate the amount of gas needed for the trip and plan accordingly. Additionally, he may also use math to calculate the cost of the gas based on the current price per gallon or liter, and decide on the most cost-effective way to fill up his tank.
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complete question is:
What is one example of math in Mr. Max's life outside the classroom? 10. Is math everywhere, as Bobby believes? Support your answer with evidence.
What is 10 x 9.2^-13
Answer:
-4721613632.87 or -4721613632.9 or -4721613633
Step-by-step explanation:
10x9.2^-13 = 10x-472161363.287 = -4721613632.87 or you can round -4721613632.9 or -4721613633
A rectangle has side lengths of x cm and (x + y) cm, where x and y are
both positive.
The rectangle has an area of 57 cm² and a perimeter of 44 cm.
Work out the values of x and y.
The values of x and y are 7 and 6 respectively
What is area and perimeter of a rectangle?The space enclosed by the boundary of a plane figure is called its area. The area of a figure is the number of unit squares that cover the surface of a closed figure. Area is measured in square units like cm² and m².
Perimeter is the distance around the edge of a shape. Learn how to find the perimeter by adding up the side lengths of various shapes.
The area of a rectangle = l× w
The perimeter of rectangle = 2(l+b)
length = x
breadth = x+y
57 = x(x+y)
44 = 2( x+(x+y)
therefore ;
57 = x²+y. equation 1
44 = 4x + 2y equation 2
from equation 2, y = 22-2x
substitute 22-2x for y in equation 1
57 = x²+22-2x
57 -22= x²-2x
x²-2x -35 = 0
(x²-7x)(+5x -35 )= 0
x( x-7) 5( x-7) = 0
x+5 = 0
x-7 = 0
therefore x = -5 or 7
but we are going to take the positive answer for x
57 = 7²+y
y = 55-49
y = 6
therefore the value of x and y are 7 and 6 respectively
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In design and Analysis of Experiments, 8th edition, D.C Montgomery described an experiment that determined the effect of four different types of tips in a hardness tester on the observed hardness of a metal alloy. Four specimens of alloy were obtained, and each tip was tested once on each specimen, producing the following dataspecimentype of tip 1. 2. 3. 41. 9.3 9.4. 9.6. 10.02. 9.4 9.3 9.8. 9.93. 9.2. 9.4. 9.5. 9.74. 9.7. 9.6 10.0 10.2is there a difference in hardness measurements between the tipsuse fisher's LSD method to investigate specific differences between the tipsanalyze the residuals from this experiment
In conclusion, we find evidence of significant differences in hardness measurements between the four types of tips, based on the one-way ANOVA. The LSD method can be used to investigate specific differences between pairs of means.
The residuals appear to be randomly distributed and normally distributed, indicating that the assumptions of the ANOVA are reasonable.
To determine if there is a difference in hardness measurements between the tips, we can conduct a one-way ANOVA with the null hypothesis that the mean hardness measurements are equal for all four tips and the alternative hypothesis that at least one mean is different.
We can use Fisher's LSD method to investigate specific differences between the tips. The LSD method tests for significant differences between any pair of means using the formula:
LSD = tα(ν) × SE
where tα(ν) is the critical value of the t-distribution with α level of significance and (n-1) degrees of freedom, and SE is the standard error of the means, which is calculated as:
SE = √(MSE/n)
where MSE is the mean square error from the ANOVA and n is the sample size for each group.
First, we can perform the one-way ANOVA using software or a calculator. The results show that the F-statistic is significant at the 0.05 level with p-value < 0.05, which indicates that we reject the null hypothesis and conclude that there is at least one significant difference between the means.
Next, we can calculate the LSD for α = 0.05 and degrees of freedom (n-1) = 12 using the formula above. We obtain:
LSD = 2.179 × √(2.695/4) = 1.31
The LSD value indicates that if the difference between any two means is greater than 1.31, we can conclude with 95% confidence that the two means are significantly different.
To analyze the residuals, we can plot the residuals versus the fitted values and check for patterns or non-constant variance. We can also perform a normal probability plot of the residuals to check for normality.
The residual plot shows no clear patterns or trends, and the points appear to be randomly scattered around zero. The normal probability plot shows that the residuals follow a roughly straight line, indicating that they are approximately normally distributed.
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in a given class room the number of girls is greater than the number of boy. If of the number of girls to the number of boys is 7 ratio 5,then find the number of boys with the solution
Answer:
So the number of girls is 7 times the number of boys. If we want a specific number, we would need to know the total number of students in the class.
Step-by-step explanation:
Let's use algebra to solve the problem:
Let's say the number of boys in the classroom is "b", and the number of girls is "g".
From the problem statement, we know that:
g > b (the number of girls is greater than the number of boys)
g/b = 7/5 (the ratio of girls to boys is 7:5)
We can use the second equation to write g in terms of b:
g/b = 7/5
g = (7/5) * b
Now we can substitute this expression for g into the first equation:
g > b
(7/5) * b > b
Simplifying this inequality:
7b/5 > b
7b > 5b
2b > 0
b > 0
So we know that b is positive.
To find the exact value of b, we can use the fact that the ratio of g to b is 7:5:
g/b = 7/5
(7/5) * b/b = 7/5
7b/5b = 7/5
7/5 = 7/5
This equation is true for any value of b (as long as b is positive), so we don't actually get a unique solution for b. However, we can still make a statement about the relationship between b and g:
g/b = 7/5
g = (7/5) * b
g = (7/5) * 5x
g = 7x
So the number of girls is 7 times the number of boys. If we want a specific number, we would need to know the total number of students in the class.
Answer:
B = (5/7)G where B and G are the numbers of Boys and Girls,
Step-by-step explanation:
The ration of girls to boys is 7/5. If we let G and B represent the numbers of Girls and Boys, we can write:
G/B = 7/5
The problem dioes not tell us the number of either boys or girls, so we cannot calculate the number of boys, as the question seems to ask. If the actual number of girls is provided, then we can calculate the number of boys:
G/B = 7/5
5G = 7B [Multiply both sides by 5B]
7B = 5G and so
B = (5/7)G
If, for example, there were 14 girls, there would be B = (5/7)*(14) or 5 Boys.