Helppppppppppp!!!!!!!!!!!!!!!!!!!

A type of article that provides a quantitative summary of the evidence is a systematic review and meta-analysis.

A systematic review is a comprehensive and rigorous approach to synthesizing existing research literature on a specific topic. It involves a systematic search for relevant studies, an assessment of their quality and relevance, and a synthesis of the findings.

A meta-analysis, on the other hand, is a statistical method that combines the results of multiple studies to generate a quantitative summary of the evidence.

Systematic reviews and meta-analyses are considered the highest level of evidence in evidence-based medicine and other fields. They provide an objective and rigorous assessment of the available evidence, helping to guide clinical practice, policy decisions, and further research.

By pooling data from multiple studies, meta-analyses can provide more precise estimates of treatment effects or other outcomes of interest.

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Answer:

x = 109

Step-by-step explanation:

The figure has one pair of parallel sides and is a trapezoid.

The lower base angle is supplementary to the upper base angle on the same side, thus

x + x - 38 = 180 , that is

2x - 38 = 180 ( add 38 to both sides )

2x = 218 ( divide both sides by 2 )

x = 109

angle ABC is being bisected, meaning the two halves are equal. Segment x and 9 are corresponding, so x = 9

Answer:

x = 11

z = 86

Step-by-step explanation:

8x + 6 and 10x-16 are vertical angles

Vertical angles are pairs of angles that are opposite each other and have the same vertex, or point of intersection. They are formed when two lines intersect at a point, and are always congruent, or of equal measure.

To solve this equation, we need to isolate the variable x on one side of the equation. To do this, we can start by subtracting 6 from both sides of the equation:

8x + 6 - 6 = 10x - 16 - 6

8x = 10x - 22

Now we can subtract 8x from both sides of the equation:

8x - 8x = 10x - 22 - 8x

0 = 2x - 22

To solve for x, we can add 22 to both sides of the equation:

0 + 22 = 2x - 22 + 22

22 = 2x

Finally, we can divide both sides of the equation by 2 to find the value of x: 22 / 2 = 2x / 2

x = 11

Therefore, the solution to the equation is x = 11.

Now that we have x, z is a supplementary angle to 8x + 6 (or you could do 10x - 16)

Supplementary angles are pairs of angles that add up to 180 degrees. They are formed when two lines intersect at a point, and the angles formed at the intersection are supplementary.

First plug in x, 8x + 6 = 8(11) + 6 = 88 + 6 = 94

180 - 94 = z

z = 86

Answer:

Thomas can choose any 4 out of 12 players, which is \($\binom{12}{4}$\) distinct possibilities for a team. Carrie can choose any 4 out of the remaining 8 players, which is \($\binom{8}{4}$\) distinct possibilities for a team. Lenny has only 1 choice for his team, whichever 4 have not yet been chosen. Combining all this yields

\(\frac{12\times11\times10\times9}{4\times3\times2}\times\frac{8\times7\times6\times5}{4\times3\times2} &= 11\times 10 \times 9 \times 7 \times 5 \\&= 99\times 35\times 10 \\&= (3500-35)\times 10 \\&= \boxed{34,650\text{ ways}}.\)

Answer:

26

Step-by-step explanation:

If n means 9 then 26 is the correct answer because 9hr. - 1hr. = 8hr. x 3 = 24 rings + 2 rings = 26.

Answer:

D. 60

Step-by-step explanation:

Add the percentages of 25% and 35% and you'll get 60.

Answer:

A 480

Step-by-step explanation:

in 2000=480 i don't know how to farther explain it to you.hope that helps.

Some of the most common symbols used in formulas include (addition), - (subtraction), * (multiplication), and / (division). These are called "operators". The correct option is c) operators.

Operators are symbols that represent a specific operation to be performed on one or more values or variables. In mathematics and programming, operators are used to build expressions that represent calculations. The most common operators include addition (+), subtraction (-), multiplication (*), and division (/), which are used to perform basic arithmetic operations.

Other operators include exponents (^), modulus (%), and comparison operators (>, <, =, etc.), which are used for more complex operations. Understanding operators is an essential part of learning mathematics and programming, as they form the building blocks for more complex calculations and algorithms. The correct option is c) operators.

The complete question is:

Fill in the blank: Some of the most common symbols used in formulas include + (addition), - (subtraction), * (multiplication), and / (division). These are called _____.

a) references

b) domains

c) operators

d) counts

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A simulation model with only discrete probability distributions produces the same results as the corresponding decision tree model.

Because both models use probability distributions to represent the uncertainty and randomness of the system being analyzed. The simulation model uses random numbers to generate outcomes based on the probability distributions, while the decision tree model uses branches and probabilities to calculate the expected value of each outcome.
Since both models use the same probability distributions, they will produce the same results when analyzing the same system. The differences in the solution methods arise because the simulation model generates outcomes through random numbers, while the decision tree model uses a deterministic approach to calculate the expected values. However, both models will converge towards the same results with a sufficiently large number of iterations or simulations.
Therefore, a simulation model with only discrete probability distributions can be an effective alternative to a decision tree model, especially when the system being analyzed is complex or has a large number of outcomes. The simulation model provides a flexible and efficient way to analyze the system and can easily incorporate additional factors and variables, making it a powerful tool for decision-making and analysis.
To rephrase, you'd like to know why a simulation model with discrete probability distributions produces the same results as the corresponding decision tree model, even though they use different solution methods.

A simulation model with discrete probability distributions and a decision tree model can both be used to analyze and make decisions under uncertainty. Even though they use different solution methods, they can produce the same results because they are essentially representing the same underlying probability distributions and possible outcomes.
In a simulation model, the discrete probability distributions are used to generate random variables that represent the uncertain elements of the problem. These random variables are then used to run multiple simulations, allowing the model to capture the range of possible outcomes.
In a decision tree model, the discrete probability distributions are directly represented as branches in the tree. Each branch represents a possible outcome, and the probabilities are assigned to each branch accordingly.
Both methods ultimately provide a way to analyze and make decisions under uncertainty by accounting for the discrete probability distributions. The simulation model does so by running multiple iterations and averaging the results, while the decision tree model does so by directly incorporating the probabilities into the tree structure. Since both methods account for the same underlying probability distributions and possible outcomes, they can produce the same results.

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Answer:

The y-int is 1

Step-by-step explanation:

random words

Answer:

y-intercept: (0,1)

Step-by-step explanation:

Solve for y by substituting x with 0:

y = 4x + 1

y = 4(0) + 1

y = 0 + 1

y = 1

Solve for x by substituting y with 0:

0 = 4x + 1

0 = 4x

x =  0

y-intercept = (0,1)

Since the range from 40 to 80 is within two standard deviations of the mean,

What is Normal distribution?

Normal distribution is a statistical concept that describes a continuous probability distribution of a random variable. It is also called the Gaussian distribution or bell curve, because of its characteristic shape that resembles a bell. The normal distribution is used to model many natural phenomena in various fields, including science, engineering, finance, social science, and others.

To use the Empirical Rule, we need to know that in a normal distribution:

About 68% of the data falls within one standard deviation of the mean.

About 95% of the data falls within two standard deviations of the mean.

About 99.7% of the data falls within three standard deviations of the mean.

In this case, we want to find the percentage of phone calls answered that are between 40 and 80. To do this, we need to find out how many standard deviations away from the mean these values are.

The lower bound of 40 is 2 standard deviations away from the mean: (40 - 60) / 10 = -2.

The upper bound of 80 is 2 standard deviations away from the mean: (80 - 60) / 10 = 2.

Therefore, we can use the Empirical Rule and say that approximately 95% of the phone calls answered by the receptionists each day fall within two standard deviations of the mean. Since the range from 40 to 80 is within two standard deviations of the mean, we can conclude that approximately 95% of the daily phone calls fall within this range.

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L = lenght = 4w + 7

W = width

Perimeter = 2L + 2W

74 = 2 (4W + 7 ) + 2 W

74 = 8W + 14 + 2 W

74 = 10W + 14

74-14 = 10W

60 = 10W

60/10 = W

6 = W

L = 4W + 7

L= 4(6) +7

L= 24+7

L= 31

Answer:

Lenght = 31 inches

Width = 6 inches

Answer:

6

Step-by-step explanation:

The common ratio (also called the growth factor or decay factor) representing the car's value every year is 0.84 and in percentage is 84%

From the question, we have the information available are:

Carmen buys a car for $28,000.

The vehicle depreciates by 16% each year.

We have to find the common ratio (also called the growth factor or decay factor) representing the car's value every year.

Now, According to the question:

Firstly, we have find the value of car in the next year:

Value next year = (100% - 16%) × 28,000

Value next year = 84% × 28,000

Value next year = 23,520

The value of the car in the next year is $23,520

Now, Find the common ratio:

Ratio = value of next year/value of recent year

Ratio = 23,520 / 28,000

Ratio = 0.84

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Answer:

Collinear because the points are all connected to each other

Noncollinear would be like Point G, I, and B (Because they're separated)

Step-by-step explanation:

The weight gained by the spot dog during his time is 57/2 ounces.

An operation is a function in mathematics that converts zero or more input values, also known as "operands" or "arguments," into a clearly defined output value. The operation's complexity is determined by its operand count.

The most frequently studied operations are unary operations (i.e., operations of arity 1), which include additive inverse and multiplicative inverse, as well as binary operations (i.e., operations of arity 2), which include addition and multiplication. The nullary operation, also known as an operation of arity zero, is a constant. A ternary operation, also known as an operation of arity 3, is an example of the mixed product.

Given that, spot the Dog gained 4 3/4 ounces each week for the first 6 weeks of his life.

Convert the mixed fraction into improper fraction:

4 3/4 = 19/4 ounces

The weight gained for 6 weeks is:

19/4 (6) = 114/4 = 57/2

Hence, the weight gained by the spot dog during his time is 57/2 ounces.

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A probability model gives information about the likelihood of different outcomes of a random event or experiment.

A probability model is a mathematical tool used to describe the likelihood of different outcomes in a random event or experiment. It provides information about the distribution of probabilities associated with the different possible outcomes, and can be used to make predictions about the likelihood of specific events occurring.

Probability models can be simple or complex, depending on the nature of the event or experiment being modeled, and can be used to make predictions in a wide range of fields, from finance to physics. By providing a framework for understanding the distribution of probabilities associated with different outcomes, probability models allow us to make informed decisions and assess risk in a variety of contexts.

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Answer:

Step-by-step explanation:

The given system of equations is:

28d + 9.5n = 552

d + n = 25

We can solve for one of the variables in the first equation and substitute that value into the second equation. Let's solve for d:

28d + 9.5n = 552

d = (552 - 9.5n) / 28

Now we can substitute this expression for d into the second equation:

d + n = 25

(552 - 9.5n) / 28 + n = 25

552 - 9.5n + 28n = 700

18.5n = 700 - 552

18.5n = 148

n = 8

So, we have found that n = 8, which represents the number of nighttime hours. To find the number of daytime hours, we can use the value of n and the first equation:

28d + 9.5n = 552

28d + 9.5 * 8 = 552

28d + 76 = 552

28d = 476

d = 17

Therefore, Esther was charged for 17 daytime hours and 8 nighttime hours, so the answer is (c) 17 daytime hours and 8 nighttime hours.

Answer:

$167.50

$1507.50

$134

Step-by-step explanation:

Given that:

Cost of sound system = 1675

APR, = 12%

Down payment = 10%

Number of monthly payments = 12

r = 0.12 / 12 = 0.01

Amount of down-payment :

10% * cost of sound system

0.1 * 1675 = $167.50

Amount to be financed :

$1675 - $167.50

= $1507.50

Monthly repayment :

Using the relation :

A / {[(1+r)^n]-1}/[r(1+r)^n]

1507.5 / (1+0.01)^12-1)/(0.01(1+0.01)^12)

1507.50 / 0.1268/(0.01 * 1.1268)

1507.50 ÷ (0.1268/0.01126)

1507.50 ÷ 11.25

= $134

The information in assertion 2 that says Retrievers make up 15 percent of the dogs at the event is untrue.

A value or ratio that may be stated as a fraction of 100 is referred to as a percentage in mathematics. If we need to compute a percentage of a number, we should divide it by its whole and then multiply it by 100. The proportion, therefore, refers to a component per hundred. Per 100 is what the term percent signifies. The letter "%" stands for it.

Given, 35% of the dogs at a dog show are German shepherds. 10% of the dogs are poodles, 45% of the dogs are spaniels, and the rest were retrievers.

Since the rest dog breed was retrievers,

Thus, retrievers = 100- 45-35-10

retrievers = 10%

Therefore, statement 2 which states Retrievers account for 15 percent of the dogs at the show is incorrect.

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The length of each line a , b and C are 0.1875, 0.5625 and 1 inch(es) respectively

From the measuring rule given ;

Therefore, using the value per tick value calculated above , we can deduce the length of the each line.

The measure of 'a':

The measure of 'b':

The measure of 'c':

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Answer:

$36 off

Step-by-step explanation:

$60 x 0.60 = 36

if you need the total cost of the item just 60 - 36 = 24

so you get $36 off of 60

and the new cost would be $24

Answer:

4(4x + 7)

Step-by-step explanation:

To answer this question you need to understand what GCF is

GCF is Greatest Common Factor

GCF is the highest number that divides exactly into two or more numbers.

The expression is 16x + 28

The highest number that can divide 16 and 28 is 4

Dividing 16x + 28 gives => 16x/4 + 28/4 => 4x + 7

So the factored expression is

4(4x + 7)

The line plot shows the favorite color of the students in the class. Option A, 9 students liked red or blue.

The line plot presents four columns with red, blue, orange, and yellow colors at the bottom. The number of students liking the color is represented by the x variable. The line plot presents five x in the column of red and four x in the column of blue. Therefore, a total number of students liking the color red and blue are option 9.

A line plot or line chart presents a chart along the number line. Line dots are often used in the line chart but variables can be presented by alphabet as well. It presents the frequency of the number of times the variable is presented in the data. If the data is big in numbers, the legend is used to present the variable. For instance, the legend of the line plot is x. Therefore, x = 5 students.

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Answer:

A

Step-by-step explanation:

Answer:

12

Step-by-step explanation:

step by step explanation

The area of the parallelogram is  192 square cm.

Height (h) = 8 cm

Base (b) = 24 cm

Side (s) = 9 cm

We need to find the area of the parallelogram.

Area of a parallelogram = base × height

We know that the base of the parallelogram is b = 24 cm and the height is h = 8 cm.

The formula for the area of a parallelogram is:

A = b × h

On substituting the values in the above equation, we get:

A = 24 × 8 = 192 cm².

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Answer:

As engine size increases, highway mileage decreases.

Step-by-step explanation:

By using the graph of the function shown above, the solution include the following:

f(-7) = -6.

f(-3) = 9.

In Mathematics and Geometry, a function can be defined as a mathematical expression which is typically used for defining and representing the relationship that exists between two or more variables.

This ultimately implies that, an input value (x-value) represents the value on the x-axis of a cartesian coordinate while an output value (y-value) represents the value on the y-axis of a cartesian coordinate.

Based on the information provided about this function, an ordered pair that models the situation is given by;

f(-7) = -6  ⇒ Ordered pair (-7, -6).

f(-3) = 9  ⇒ Ordered pair (-3, 9).

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The first derivatives for the given functions are:

For \(y = 3x^2 + 5x + 10,\) the first derivative is dy/dx = 6x + 5.

For  \(y = 100200x + 7x,\) the first derivative is dy/dx = 100207.

For \(y = ln(9x^4),\) the first derivative is dy/dx = 4/x.

To find the first derivative for each of the given functions, we'll use the power rule, constant rule, and chain rule as needed.

For the function\(y = 3x^2 + 5x + 10:\)

Taking the derivative term by term:

\(d/dx (3x^2) = 6x\)

d/dx (5x) = 5

d/dx (10) = 0

Therefore, the first derivative is:

dy/dx = 6x + 5

For the function y = 100200x + 7x:

Taking the derivative term by term:

d/dx (100200x) = 100200

d/dx (7x) = 7

Therefore, the first derivative is:

dy/dx = 100200 + 7 = 100207

For the function \(y = ln(9x^4):\)

Using the chain rule, the derivative of ln(u) is du/dx divided by u:

dy/dx = (1/u) \(\times\) du/dx

Let's differentiate the function using the chain rule:

\(u = 9x^4\)

\(du/dx = d/dx (9x^4) = 36x^3\)

Now, substitute the values back into the derivative formula:

\(dy/dx = (1/u) \times du/dx = (1/(9x^4)) \times (36x^3) = 36x^3 / (9x^4) = 4/x\)

Therefore, the first derivative is:

dy/dx = 4/x

To summarize:

For \(y = 3x^2 + 5x + 10,\) the first derivative is dy/dx = 6x + 5.

For y = 100200x + 7x, the first derivative is dy/dx = 100207.

For\(y = ln(9x^4),\) the first derivative is dy/dx = 4/x.

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