Select the correct answer. Which expression is equivalent to this polynomial? x2 + 8
A. ( x + 2 ⁢ 2 ) ⁢ ( x − 2 ⁢ 2 )
B. ( x + 4 i ) ⁢ ( x − 4 i )
C. ( x + 2 ⁢ 2 ) 2 D.

Step-by-step explanation:

a probability is always the ratio of

desired cases / totally possible cases

in our case, where we pull one card out of 52, the totally possible cases are, of course, 52.

now, we need to find the number of desired cases.

8 of diamonds is pulled.

well, that is one specific card. no other card matches this criteria. so, the probability is

1/52 = 0.019230769... ≈ 0.019

heart or spade is selected.

we have 13 cards of heart.

we have 13 cards of spades.

there is no overlap, so, together they are 26.

the probably is then

26/52 = 1/2 = 0.5

number smaller than 7 is pulled.

"smaller than 7" means 1..6.

that means 6 cards of each of the 4 suits = 24 cards.

the probability is then

24/52 = 6/13 = 0.461538462... ≈ 0.462

Answer:

[tex]y=1-Ae^{\frac{1}{2}x^2-x}[/tex]

Step-by-step explanation:

Given equation:

[tex]\dfrac{\text{d}y}{\text{d}x}=(1-x)(1-y)[/tex]

Separate the variables by moving all the y terms to one side of the equation and all the x terms to the other side:

[tex]\implies \dfrac{1}{(1-y)}\;\text{d}y=(1-x)\;\text{d}x[/tex]

Integrate both sides of the equation separately:

[tex]\implies \displaystyle \int \dfrac{1}{(1-y)}\;\text{d}y= \int (1-x)\;\text{d}x[/tex]

[tex]\implies -\ln |1-y|+C=x-\dfrac{1}{2}x^2+D[/tex]

[tex]\implies \ln |1-y|-C=\dfrac{1}{2}x^2-x-D[/tex]

Write the two constants as one (a = -D + C):

[tex]\implies \ln |1-y|=\dfrac{1}{2}x^2-x+a[/tex]

Take exponents of both sides:

[tex]\implies e^{\ln |1-y|}=e^{\frac{1}{2}x^2-x++a}[/tex]

[tex]\textsf{As }\; e^{\ln y}=y:[/tex]

[tex]\implies 1-y=e^{\frac{1}{2}x^2-x+a}[/tex]

[tex]\textsf{Apply exponent rule} \quad a^{b+c}=a^b \cdot a^c:[/tex]

[tex]\implies 1-y=e^{\frac{1}{2}x^2-x}e^{a}[/tex]

As [tex]e^{a}[/tex] is just a constant, replace it with A:

[tex]\implies 1-y=Ae^{\frac{1}{2}x^2-x}[/tex]

Rearrange to make y the subject:

[tex]\implies y=1-Ae^{\frac{1}{2}x^2-x}[/tex]

Answer: Each meat patty would have 72 ounces of hamburger divided by 24 patties, which is equal to 3 ounces per patty.

Step-by-step explanation:

Using Trigonometric identities, On the interval 0 2, we wish to locate all solutions to the equation 2sin() = 3. The sole answer is = 1.05.

Trigonometric Identities are equality statements that hold true for all values of the variables in the equation and that use trigonometry functions. There are numerous distinctive trigonometric identities that relate a triangle's side length and angle.

Determining the answer to the following equation is therefore important: 2sin(θ) = √3

To begin, split both sides by two to obtain:

sin(θ) = (√3)/2

Now consider the behavior of the inverse sine function:

Asin(x) = sin(x) and Asin(x) = x

We can therefore apply this to both sides to obtain:

Asin(sin(s)) = Asin(sin(s))/3)

θ = Asin((√3)/2) = 1.05

The single solution in the interval is: because we know that the sine function's period is 2 and that there is only one solution on the range between 0 and 2:

θ = 1.05

sin(3θ) = √3/2

θ = π/9 + 2kπ/3, 2π/9 + 2kπ/3

We obtain = /9, 2/9 if k = 0.

We obtain = 7/9 and 8/9 if k = 1.

We obtain = 13/9 and 14/9 if k = 2.

Other values of k produce values of beyond the range [0, 2].

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Answer:

To find the roots of 4x² - 12x + 9 = 0 graphically, we need to plot the equation on a graph and find the x-intercepts, which are the roots.

Here are the steps to graph the equation:

Plot the x-axis and y-axis on the graph

Plot the points (x, 4x² - 12x + 9) for several values of x within the range of -1 to 4.

Connect the points to form a smooth curve.

Find the x-intercepts, where the curve intersects the x-axis. These points represent the roots of the equation.

After finding the x-intercepts, we can use the x-value of each intercept to substitute back into the original equation to find the corresponding y-value. This confirms that the x-intercepts are indeed the roots of the equation.

Note: The above steps can also be done using a graphing calculator or software.

Answer:

The equation has 3 solutions x(1) = -2 x(2) = 0 x(3) = 3

Step-by-step explanation:

1.When the product of the factor equals 0, atleast one of the factors is 0

x=0

x^2 - x - 6 = 0

2.solve the equation for x

x = 0

x = -2

x = 3

hope this helped :D

A graph of the linear equation -3x + 5y = 7 in slope-intercept form is shown in the image attached below.

In Mathematics, a graph is a type of chart that is typically used for the graphical representation of data points or ordered pairs on both the horizontal and vertical lines of a cartesian coordinate respectively.

Next, we would rearrange and simplify the given given linear equation in slope-intercept form in order to enable us plot it on a graph:

-3x + 5y = 7

5y = 3x + 7

y = 3x/5 + 7/5

Lastly, we would use an online graphing calculator to plot the given function as shown in the graph attached below.

In conclusion, the slope of this linear equation is equal to 3/5 and it does not represent a proportional relationship.

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Surface area is, [tex]225\pi (yd^{2})[/tex] or [tex]706.86(yd^{2})[/tex] .

As we may see in the image, the surface area has the shape of a circle.

Formula: [tex]A=\pi r^{2}[/tex]; where "r" is the radius of the circle.

As we can see in the image, the radius of this circle is 15 yd (yards).

[tex]A=\pi (15yd)^{2}\\ \\A=225\pi (yd^{2}) =706.86(yd^{2})[/tex]

Surface area is, [tex]225\pi (yd^{2})[/tex] or [tex]706.86(yd^{2})[/tex] (706.86 square yards).

Hence proved  f is not one-to-one.

A function is a mathematical concept that assigns a unique output value for each input value.

In mathematical notation, a function is usually expressed as "f(x)" where "x" is the input and "f(x)" is the corresponding output. For example, a function could be defined as f(x) = x^2, which means that for any value of x, the function will calculate and return the square of that value.

Functions play a central role in mathematics and are used to model real-world phenomena and to study the relationships between variables. They are also used in computer programming to perform specific tasks, such as converting temperatures from Celsius to Fahrenheit or calculating the square root of a number.

Suppose that f is a function from S to T, where |S| > |T|. This means that there are more elements in S than there are in T.

Since f maps elements of S to elements of T, we can think of f as pairing elements of S with elements of T. However, since |S| > |T|, there will be at least two elements of S that are paired with the same element of T, and these two elements are s1 and s2.

Therefore, f is not one-to-one, as f(s1) = f(s2), meaning that two different elements of S are mapped to the same element of T.

This shows that if f is a function from S to T, where |S| > |T|, then there must exist elements s1 and s2 in S such that f(s1) = f(s2), and hence f is not one-to-one.

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The slope of one of the dotted lines is equal to 1.

The slope of the line of reflection is equal to -1.

In Mathematics, the slope of any straight line can be determined by using this mathematical equation;

Slope (m) = (Change in y-axis, Δy)/(Change in x-axis, Δx)

Slope (m) = (y₂ - y₁)/(x₂ - x₁)

Substituting the given data points into the slope formula, the slope of one of the dotted lines include the following;

Slope, m = (4 - 1)/(-1 - (-4))

Slope, m = 3/(-1 + 4)

Slope, m = 3/3.

Slope, m = 1.

For the line of reflection, the slope is given by:

Slope, m = (2 - 4)/(1 - (-1))

Slope, m = -2/(1 + 1)

Slope, m = -2/2.

Slope, m = -1.

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The independent variable, x, represents the number of questions Maya answered correctly, and the dependent variable is the score, because the score depends on the number of questions Maya answered correctly. A function relating these variables is R(x) = [5x].

So R(14) = [70], meaning 14 correct answers will give a score of 70.

What is a variable?

In mathematics, a variable is referred to as the alphanumeric symbol used to represent a number or numerical value. An unknown quantity is represented as a variable in algebraic equations.

The variables can be divided into two groups, including dependent variable and independent variable.

We are given that each question answered correctly on a test would be worth 5 points.

So, the dependent variable is the score as it depends on the number of questions Maya answered correctly.

The independent variable is the number of questions Maya answered correctly.

From this, we get the function as R(x) = [5x].

Substituting 14 in place of x, we get

R(14) = [70]

This means that 14 correct answers will give a score of 70.

Hence, the independent variable, x, represents the number of questions Maya answered correctly, and the dependent variable is the score, because the score depends on the number of questions Maya answered correctly.

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The empirical rule states that for a normal distribution, approximately 68% of the data falls within one standard deviation of the mean, 95% falls within two standard deviations, and 99.7% falls within three standard deviations.

It is a statistical calculation that provides a way of summarizing how much a set of values deviates from the mean, or average, of those values.

The standard deviation is calculated by first finding the difference between each value in the set and the mean, squaring these differences, summing the squares, and dividing by the number of values in the set. The square root of this result gives the standard deviation.

A low standard deviation indicates that the values in a set are closely clustered around the mean, while a high standard deviation indicates that the values are more spread out. The standard deviation is useful in many applications, including quality control, finance, and social sciences, as it provides a way to quantify the variability of a set of values and to make meaningful comparisons between different sets of data.

We can estimate the answer by using the cumulative distribution function (CDF) of the normal distribution. The CDF gives us the probability that a random variable is less than or equal to a certain value. We would need to use a calculator or software to determine the exact value of the CDF, but we can estimate it using the empirical rule.

Since approximately 68% of regular grade gasoline falls within one standard deviation of the mean, we can estimate that roughly 68% of gasoline is less than 83.75.

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Answer: To find the angle θ in a right triangle given the cosine value, we can use the inverse cosine function, also known as arccos.

cos θ = A/H = 22/38

θ = arccos (22/38)

Using a table of trigonometric values or a calculator, we can find the value of arccos (22/38) to be approximately 56.3 degrees.

So, θ = 56.3° (rounded to the nearest degree).

Step-by-step explanation:

Compared with the parent function y= sin(x), the graph of 4 sin[ (π/6)x ] + 1 will be stretched vertically by a scale factor of 4, translated 1 unit up, and with a shorter distance between the peaks.

What is a function?

Each element of X receives exactly one element of Y when a function from one set to the other is used. The sets X and Y are collectively referred to as the function's domain and codomain, respectively. Initially, functions represented the idealized relationship between varied quantities and other variables.

Here, we have

1) The parent function is sin(x)

2) sin(x) has:

Middle line: y = 0

Amplitude: 1 because the function goes from 1 unit up to 1 unit down the middle line.

Period: 2π because the sine function repeats every 2π unit.

y-intercept: (0,0) because sin(0) = 0.

Now look at how these changes in the function reflect on the parameters:

A sin (ωx + B) + C:

That function will have:

amplitude A, because the amplitude is scaled by that factor

Period: 2π / ω, because the function is compressed horizontally by that factor.

It will be translated B units to the left

It will be translated C units up.

And you need

Period = 12 => 2π / ω = 12 => ω = π/6

A = 4

Translate the midline from y = 0 to y = 1 => shift the function 1 unit up => C = 1.

Translate the y-intercept from y = 0 to y = 1, which is already accomplished when you translate the function 1 unit up.

So, this is the function searched

y = A sin (ωx + B) + C = 4 sin[ (π/6)x ] + 1

Now you can check the amplitude, the period, the middle line, and the y-intercept of that y = 4 sin[ (π/6)x ] + 1.

Hence, compared with the parent function y= sin(x), the graph of 4 sin[ (π/6)x ] + 1 will be stretched vertically by a scale factor of 4, translated 1 unit up, and with a shorter distance between the peaks.

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When a singular die is rolled once, the results are represented by the probability distribution P(X = x) = 1/6, 1,2,3,4,5,6 for random variable X.

Probability is the potential outcome of any random occurrence. This expression relates to estimating the chance that any certain event will take place. How likely are we to get a head, for example, if we flip the coin into the air? The solution to this question is based on the potential number of occurrences.

When one die is rolled, there are only six possible outcomes: 1, 2, 3, 4, and 5. Due to the equal likelihood of each scenario, its sp risk is 1/6. The following is true for the required posterior distribution of the random variable x:

P(X = x) = 1/6, 1,2,3,4,5,6

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Answer:  V=144π  cm³

Step-by-step explanation:

Answer:

y = - [tex]\frac{1}{3}[/tex] x + 3

Step-by-step explanation:

the equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = 3x + 2 ← is in slope- intercept form

with slope m = 3

given a line with slope m then the slope of a line perpendicular to it is

[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{m}[/tex] = - [tex]\frac{1}{3}[/tex] , then

y = - [tex]\frac{1}{3}[/tex] x + c ← is the partial equation

to find c substitute (- 9, 6 ) into the partial equation

6 = - [tex]\frac{1}{3}[/tex] (- 9) + c = 3 + c ( subtract 3 from both sides )

3 = c

y = - [tex]\frac{1}{3}[/tex] x + 3 ← equation of perpendicular line

The Hypergeometric distribution is 0.7717, and the binomial distribution is 0.7763. The probability from the binomial approximation is greater than the probability from hypergeometric distribution.

In statistics, a hypergeometric distribution is a distribution function in which members of two groups are chosen from without being replaced. The absence of replacements in the hypergeometric distribution sets it apart from the binomial distribution. As a result, it is frequently used in random sampling to ensure statistical quality.

Given that,

The number of defective bolts are 5 out of 200.

Thus, the probability of 0 defective bolts is given as:

1. Hypergeometric distribution:

P (X= 0) = 5C 0 (195C 10) / (200C 10)

= 0.7717

2. Binomial approximation:

B(n, m/ N)

P (X= 0) = 10C 0 (0.025)^0 (1-0.025)^10

= 0.7763

Thus, probability from the binomial approximation is greater than the probability from hypergeometric distribution.

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The benefits and limitations of quadratic models in real-world applications such as bridge design are listed below.

Quadratic models are often used in real-world applications, such as bridge design, because of their ability to describe complex relationships between variables.

Some benefits of using quadratic models in these applications include:

1. Flexibility: Quadratic models are more flexible than linear models and can better capture non-linear relationships between variables.

2. Accuracy: Quadratic models can provide a more accurate representation of the data compared to linear models, especially when the data exhibits a curved trend.

3. Prediction: Quadratic models can be used to make predictions about the future based on past data. For example, they can be used to predict the load-bearing capacity of a bridge over time.

However, there are also some limitations of using quadratic models in real-world applications such as bridge design:

1. Overfitting: Quadratic models have the potential to overfit the data, leading to poor generalization to new data. This can result in an overly complex model that does not accurately represent the underlying relationships in the data.

2. Computational complexity: Quadratic models can be computationally more complex than linear models and require more advanced optimization techniques to solve.

3. Interpretation: Quadratic models can be difficult to interpret, making it challenging to understand the underlying relationships between variables.

4. Unpredictable behavior: Quadratic models can exhibit unpredictable behavior for certain input values, which may not be suitable for certain applications such as bridge design where the model must be reliable and predictable.

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It would be A. y = -log x

I did it on desmos the graph website

Answer:

9.80

Step-by-step explanation:

x²=14²-10² = 196-100 = 96

x=√96 = √(16*6 ) = 4*√6 =4*2.45=9.80

The probability that a randomly selected Atlantic cod has a length of 53.68 cm or less is given by the equation P ( x < 53.68 ) = 0.8439

The relationship between a value and the mean of a set of values is expressed numerically by a Z-score. The Z-score is computed using the standard deviations from the mean. A Z-score of zero indicates that the data point's score and the mean score are identical.

The Z-score is calculated using the formula:

z = (x - μ)/σ

where z: standard score

x: observed value

μ: mean of the sample

σ: standard deviation of the sample

Given data ,

Let the probability that a randomly selected Atlantic cod has a length of 53.68 cm or less be represented as P

Now , the equation will be

The observed value of x = 53.68 cm

The mean of the sample μ = 49.9 cm

The standard deviation of the sample σ = 3.74 cm

Now , z-score is calculated using the formula:

z = (x - μ)/σ

Substituting the values in the equation , we get

z = ( 53.68 - 49.9 ) / 3.74

z = 1.0107

Now ,the p value from the z table is

P ( x < 53.68 ) = 0.84392

And , the probability is P ( x < 53.68 ) = 84.392 %

Hence , the probability is 84.392 %

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Using the midpoint formula, B is: (-9, 1).

The midpoint of a line segment is given by the average of the coordinates of the endpoints. So, the midpoint of AB is (-2,4), and A = (5, 7), we can find B by using the midpoint formula:

M(x, y) = [(x1 + x2)/2, (y1 + y2)/2]

Given:

A(5, 7) = (x1, y1)

B(?, ?) = (x2, y2)

M(x, y)

Plug in the values:

(-2, 4) = [(5 + x2)/2, (7 + y2)/2]

Solve for each coordinates of B:

-2 = (5 + x2)/2

-4 = 5 + x2

-4 - 5 = x2

x2 = -9

4 = (7 + y2)/2

8 = 7 + y2

8 - 7 = y2

y2 = 1

B is: (-9, 1)

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If C.)Angle B is congruent to angle E then ∆ABC and ∆DEF are congruent by the ASA criterion.

In geometry, two figures or objects are said to be congruent if their shapes and sizes match, or if one is the mirror image of the other.

According to the ASA congruence postulate, two triangles are congruent when two angles and the included side of one triangle are congruent with two angles and the included side of another triangle.

Looking at our diagram, we can see that the angle C and side CB of ABC are, respectively, congruent with the angle F and side FE of DEF.

Since CB is a side of ABC between angles C and B and FE is a side of DEF between angles F and E, angle B must be equal to angle E for these two triangles to be congruent by ASA.

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1. If , _____ then ∆ABC and ∆DEF are congruent by the ASA criterion.

A.) AB=DE

B.)CA=FD

C.)Angle B is congruent to angle E

D.)Angle A is congruent to angle D

Answer:.

Step-by-step explanation:

.

Answer:

144 feet

5 seconds

Step-by-step explanation:

A directly proportional distance between s and  t can be written as
s ∝ t²

or in equation form

s(t) = k · t²

k = constant of proportionality

Given s = 16 feet for t = 1 second we get

16 = k (1)²

or

k = 16

and the equation is s(t) = 16t²

In 3 seconds the object will fall
s(3) = 16 (3)²

= 16 x 9

= 144

s(3) = 144

To find time taken to fall 400 feet, substitute for s s(t) = 400

400 = 16t²

16t² = 400

t² = 400/16 = 25

t = ± √25 = ± 5 seconds

Since time is non-negatiive,

t = 5 seconds

The p=value of this sample is p = 0.076

You should understand that the p value is a number, calculated from a statistical test, that describes how likely you are to have found a particular set of observations if the null hypothesis were true.

P values are used in hypothesis testing to help decide whether to reject the null hypothesis. The smaller the p value, the more likely you are to reject the null hypothesis.

This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

µ = 73.8

For the alternative hypothesis,

µ ≠ 73.8

Since the number of samples is small and no population standard deviation is given, the distribution is a student's true

Since n = 59,

Degrees of freedom, df = n - 1 = 59 - 1 = 58

t = (x - µ)/(s/√n)

Where

x = sample mean = 76.6

µ = population mean = 73.8

s = samples standard deviation = 8.6

t = (76.6 - 73.8)/(8.6/√58) = 2.8/1.13=  2.4779

We would determine the p-value using the t-test calculator. It becomes

p = 2.4779

Since alpha, 0.01 < than the p-value, 2.4779, then we would fail to reject the null hypothesis. Therefore, At a 1 % level of significance, the sample data showed that there is no significant evidence that μ ≠ 73.8

Therefore, this p-value leads to a decision to accept the null hypothesis

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The equation of the required perpendicular  line is    6y = x - 48

With an example, define perpendicular line?

Lines at right angles to one another are referred to as perpendicular lines (90 degrees). A parallel line is shown as "||," which stands for the symbol. Perpendicular lines are denoted with the symbol "". Illustration of parallel lines The opposite sides of a rectangle.

equation = y =−6x+3

               m₁ = -6

Let's consider the slope of the line perpendicular to the given line as m₂

          m₁ * m₂  = -1

         -6 * m₂  = -1

               m₂ = 1/6

The equation of the line perpendicular to the given line and passing through the point  (12,10)

       y - y₁ = m (x - x₁ )

       y - 10 = 1/6( x - 12 )

        6( y - 10 ) = (x- 12 )

        6y - 60 = x - 12

          6y = x - 12 + 60

           6y = x - 48

Thus, the equation of the required line is    6y = x - 48

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