Solve for the roots of f(x)= x^2-10x+13 by completing the square

The value of the probability P(B) is 0.67

From the question, we have the following parameters that can be used in our computation:

using the above as a guide, we have the following:

P(B) = P(A and B)/P(A)

substitute the known values in the above equation, so, we have the following representation

P(B) = 0.10/0.60

Evaluate the quotient

P(B) = 0.167

Hence, the value of P(B) is 0.167

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The contrapositive of the conditional statement is D. If the graph of two variables is not a linear function, then the two variables are not directly proportional.

"In the event that the graph of two variables fails to exhibit linearity, it can be inferred that the two variables are not directly proportional.

This contrapositive statement provides an alternative perspective on the relationship between variables and the nature of their corresponding graphs.

By examining the contrapositive, we employ an analytical approach that explores the logical implications arising from the negation of the original conditional statement. Consequently, if the graph of two variables deviates from the linear pattern, it leads us to the logical conclusion that the variables themselves are not directly proportional.

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The police can approximately stop 1990 cars if they targeted those going more than 75 mph.

To determine the number of cars that the police would stop if they were targeting those going more than 75 mph, we need to consider the normal distribution and the z-score.

Given that the mean speed is 62 mph and the standard deviation is 5 mph, we can calculate the z-score for a speed of 75 mph using the formula: z = (x - μ) / σ, where x is the given value, μ is the mean, and σ is the standard deviation. Plugging in the values, we get: z = (75 - 62) / 5 = 2.6.

To find the proportion of cars going more than 75 mph, we can consult the z-table or use statistical software. Looking up the z-score of 2.6 in the table, we find that the proportion is approximately 0.995.

Since we know there are 2000 cars on the highway, we can multiply the proportion by the total number to estimate the number of cars that would be stopped: 0.995 * 2000 = 1990.

Therefore, the police would be expected to stop approximately 1990 cars if they targeted those going more than 75 mph.

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Answer: 38.8 grams

Step-by-step explanation:

0.51*76=38.76

=38.8

Answer: 38.76 grams

Step-by-step explanation:

Well, we already know the easiest way to do this, is first figure out 50 percent, because 51 percent is so close to it. To do this, divide the original number in half (76 divided by 2), which is 38. Then we have to find one percent of 76, which means we have to move the decimal over twice, giving us .76 = 1%. Then add that and 50 percent to get 51% which is 38.75 grams.

Hope this helps :D

In this experiment, the dependent variable would be the amount of fruit production by tomato plants.

The dependent variable is the variable that is measured or observed in an experiment. It is the outcome or response that is influenced by the independent variable, which is the variable that is manipulated or controlled by the researcher. In this case, the independent variable would be the brand of fertilizer.

By testing different brands of fertilizer and measuring the resulting fruit production, the researcher can determine the impact of each brand on the tomato plants' yield. The dependent variable, which is the amount of fruit production, will vary based on the different levels or variations of the independent variable (i.e., different brands of fertilizer).

By analyzing the data collected on fruit production for each brand of fertilizer, the researcher can identify which brand yields the greatest amount of fruit. This information can be used to make informed decisions on the most effective fertilizer brand for maximizing tomato plant productivity.

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If a source of sound waves is rapidly approaching a person, the sound heard by the person appears to have a frequency higher than the original frequency.

When a source of sound waves is moving towards an observer, the sound waves become compressed or "squeezed" as the source moves closer. This compression increases the frequency of the sound waves, resulting in a higher perceived frequency or pitch. This phenomenon is known as the Doppler effect.

As the source moves closer, the waves are compressed, leading to a shorter wavelength and higher frequency.

This increase in frequency is perceived by the listener as a higher-pitched sound. Therefore, option B) "a frequency higher than the original frequency" is the correct answer in this scenario.

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The mean of the data is 41.7, the median is 41.9 and the mode of the data is 42.9.

Here,

We have,

In mathematics, the three main methods for indicating the average value of a set of integers are mean, median, and mode. Adding the numbers together and dividing the result by the total number of numbers in the list yields the arithmetic mean. An average is most frequently used to refer to this. The middle value in a list that is arranged from smallest to greatest is called the median. The value that appears the most frequently on the list is the mode.

The mean is given as:

mean = summation of the frequency / total frequency

mean = 3708/89 = 41.66

The median of the given data is the central value.

In the given data median is the mean of the ages between 56 and 57.

Median = 45 + (89/2) - 59 / 23  * (5)

Median = 41.9

The mode is given for the data having the highest frquency.

The highest frequency is observed at 40-----44:

Mode = 40 + (28 - 21) / (56 - 21 - 23) (5)

Mode = 42.9

Hence, the mean of the data is 41.7, the median is 41.9 and the mode of the data is 42.9.

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The general equation of the plane that passes through the origin and is perpendicular to the line of intersection of the planes -x+y+2=0 and z-3=0 is: x + y = 0.

What is equation?

An equation is a mathematical statement that states the equality of two expressions. It consists of two sides, often referred to as the left-hand side (LHS) and the right-hand side (RHS), separated by an equal sign (=).

To find the general equation of the plane that passes through the origin and is perpendicular to the line of intersection of the planes -x+y+2=0 and z-3=0, we need to determine the normal vector of the plane.

The line of intersection of two planes is perpendicular to the normal vectors of both planes. Therefore, we first find the normal vectors of the given planes.

For the plane -x+y+2=0, the normal vector is [coefficients of x, y, z] = [-1, 1, 0].

For the plane z-3=0, the normal vector is [coefficients of x, y, z] = [0, 0, 1].

To find the normal vector of the plane that is perpendicular to the line of intersection, we take the cross product of the normal vectors of the given planes:

[ -1, 1, 0 ] × [ 0, 0, 1 ] = [ 1, 1, 0 ].

The obtained vector, [1, 1, 0], is the normal vector of the desired plane. Now we can write the general equation of the plane:

Ax + By + Cz = 0,

where A, B, and C are the components of the normal vector.

Substituting the values A=1, B=1, and C=0, the general equation of the plane is:

x + y = 0.

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Answer:

-128

Step-by-step explanation:

Given, f(x)=2x

3

−21x

2

+36x−20

∴f

′

(x)=6x

2

−42x+36

When f(x) is a maximum or a minimum, f

′

(x)=0

Hence, 6x

2

−42x+36=0

x

2

−7x+6=0

x

2

−6x−x+6=0

x(x−6)−1(x−6)=0

(x−6)(x−1)=0

x=1,6

Again f

′′

(x)=12x−42

=6(2x−7)

Now, when x=1,f

′′

(x)=−30 ....[negative]

And when x=6,f

′′

(x)=30 ....[positive]

Hence, f(x) is maximum for x=1 and minimum for x=6.

The maximum and minimum values of f(x) are

f(1)=2(1)

3

−21(1)

2

+36(1)−20

=2−21+36−20=−3

f(6)=2(6)

2

−21(6)

2

+36(6)−20

=432−756+216−20=−128

Based on the given scenario, the most suitable recommendation for the firm would be D) Decentralize; give authority to the lower level managers regarding events in their own units.

Decentralizing decision-making in the given firm would involve granting authority to lower level managers to make decisions for their own units. This approach has several benefits. First, it empowers lower level managers and allows them to take ownership of their units, fostering a sense of responsibility and motivation.

Second, it reduces the burden on upper level managers, freeing up their time to focus on strategic planning and higher-level tasks. Third, it promotes faster decision-making at the operational level, leading to increased efficiency and responsiveness.

Fourth, it allows for better utilization of the knowledge and expertise of lower level managers who have a deeper understanding of their specific units. Decentralization can enhance overall organizational agility and adaptability to changing market conditions. So, the correct answer is D).

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--The given question is incomplete, the complete question is given below "  After extensive job cuts to reduce costs, upper level managers are spending significant amounts of time solving problems in the production units. Lower level managers are resentful that they cannot make decisions for their own units. What recommendation would you make for this firm? A) Reorganize; departmentalize around customers instead of products. B) Formalize; write explicit job descriptions, rules, and procedures so the upper managers won't have to decide each case individually. C) Centralize; create a department that does nothing but make decisions. D) Decentralize; give authority to the lower level managers regarding events in their own units."--

Answer:

Step-by-step explanation:

You can't simplify 32/23, the numerator and denominator don't have a common divisor, so you either divide 32 by 23 (32:23=1.391304347826087 which you can round to 1.4) or in mixed numbers 32/23=1 9/23

λ equals 15 when AC has a magnitude of 17.

λ is approximately -3.909 when ABC is a straight line.

λ equals 12 when ABC is a right angle.

We have,

A.

To find the value of λ in each case, we'll need to perform vector calculations based on the given information.

Find λ when AC = 17:

The position vector AC can be found by subtracting vector A from vector C:

AC = (6i + λj) - (-9i + 7j) = (6 + 9)i + (λ - 7)j = 15i + (λ - 7)j

To find the magnitude of vector AC, we can use the formula:

|AC| = √((15)² + (λ - 7)²) = 17

Squaring both sides and simplifying the equation, we get:

225 + (λ - 7)² = 289

Expanding and rearranging the equation, we have:

(λ - 7)² = 289 - 225

(λ - 7)² = 64

B.

Taking the square root of both sides (ignoring the negative root, as we are dealing with distance), we find:

λ - 7 = 8

λ = 8 + 7

λ = 15

Find λ when ABC is a straight line:

For ABC to be a straight line, the vectors AB and BC must be collinear, which means their direction ratios must be proportional.

The direction ratio of vector AB is:

(2 - (-9)) / (-1 - 7) = 11 / (-8) = -11/8

The direction ratio of vector BC is:

(6 - 2) / (λ - (-1)) = 4 / (λ + 1)

For AB and BC to be collinear, their direction ratios must be proportional. Therefore, we can set up the following equation:

-11/8 = 4 / (λ + 1)

Cross-multiplying and solving for λ, we have:

-11(λ + 1) = 32

Expanding and rearranging the equation, we get:

-11λ - 11 = 32

-11λ = 32 + 11

-11λ = 43

λ = 43 / (-11)

λ = -3.909

C.

Find λ when ABC is a right angle:

For ABC to be a right angle, the dot product of vectors AB and BC must be zero.

The dot product of AB and BC is:

(2i - j) · (6i + λj) = (2)(6) + (-1)(λ) = 12 - λ

Setting the dot product equal to zero, we have:

12 - λ = 0

λ = 12

Therefore,

λ equals 15 when AC has a magnitude of 17.

λ is approximately -3.909 when ABC is a straight line.

λ equals 12 when ABC is a right angle.

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Answer:

x=20

Step-by-step explanation:

We know that all 3 angles in a triangle must add up to 180°, so let's write an equation:

180=120+3x

subtract 120 from both sides

60=3x

divide both sides by 3

20=x

So, x=20

Hope this helps! :)

Answer:

656 nm

Step-by-step explanation:

We have the energy level transition from n = 1 to n = 2 after absorbing a photon whose wavelength is 426 nm. The photon's energy must then be equal to the difference of the energy levels  

ΔE  =
[tex]-R[\frac{1}{n_{f}^{2}} - \frac{1}{n_{i} ^{2}}][/tex]
=  -13.6(-3/4)
= 10.2
So, from n = 2 to n = 3, ΔE  = 1.89
From here, we can calculate the wavelength of that photon as 1240/1.89
= 656 nm

When quadrilateral H' is the image of quadrilateral H after a sequence of transformations. If quadrilateral H is congruent to quadrilateral H, the transformations used is

A rigid transformation also known as an isometry, is a type of transformation in mathematics that preserves the size, shape, and orientation of a geometric object. It involves moving or transforming an object without changing its overall structure or measurements.

In other words, the parts remain congruent after transformations.

Rigid transformations include three main types

Dilation is not among and this is present in all other options

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The introduction of a new battery in the computer market that requires charging only once per week would result in a shift or outward expansion of the production possibility curve.

The production possibility curve (PPC) represents the maximum combination of goods or services that an economy can produce given its resources and technology. It illustrates the trade-offs between producing different goods or services. When a new battery is introduced in the computer market that needs to be charged only once per week, it leads to an improvement in technology or an increase in productive efficiency. This technological advancement allows computer manufacturers to produce more computers or allocate fewer resources to battery charging, thus increasing their production capacity. As a result, the production possibility curve shifts outward or expands, indicating that the economy can now produce a greater quantity of computers without sacrificing the production of other goods or services. This expansion of the PPC demonstrates an increase in the economy's productive capabilities and potential for higher levels of output.

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To factor quadratics with leading coefficients other than 1, you can follow these steps:

Check your factoring by expanding the factored form to see if it simplifies back to the original quadratic equation.

Remember that factoring quadratics with leading coefficients other than 1 may involve more complex algebraic techniques, and in some cases, the quadratic equation may not factor easily. In such cases, you can resort to using the quadratic formula to find the roots of the equation.

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Considering the factors of time and cost, strategic alliances generally emerge as the quickest and cheapest way to develop a global strategy. (option c)

Strategic alliances involve partnerships or collaborations between companies from different countries, with the goal of leveraging each other's strengths to achieve mutual benefits.

By sharing resources, knowledge, and networks, companies can expand their global presence more efficiently and cost-effectively. Strategic alliances can enable faster market entry and access to new markets by leveraging the partner's existing infrastructure, distribution channels, and customer base.

Moreover, pooling resources can help reduce costs and risks associated with global expansion.

Therefore, strategic alliances can be a relatively quicker and cheaper way to develop a global strategy, as they provide an opportunity to tap into existing capabilities and market presence of the alliance partner.

Hence the correct option is (c).

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Check the picture below.

so by using that template on that picture, let's rewrite the function some and get the period.

[tex]y=\stackrel{A}{1}\cos\stackrel{ B ~\qquad ~ C }{\left(\frac{8\pi }{5}x+\frac{5\pi }{2} \right)}+\stackrel{D}{0} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{the period is}}{\cfrac{2\pi }{B}}\implies \cfrac{2\pi }{~~ \frac{ 8\pi }{ 5 } ~~}\implies \cfrac{2\pi }{1}\cdot \cfrac{5}{8\pi }\implies \cfrac{5}{4}[/tex]

The expression for his total earnings can be derived by multiplying the number of tutoring hours by the tutoring rate and adding it to the product of the number of waiter hours and the waiter rate.

Let's assume the hourly rate for Ravi's tutoring job is "t" dollars and the hourly rate for his waiter job is "w" dollars.

Since Ravi worked as a tutor for "x" hours this month, he earned a total of x * t dollars from his tutoring job.

Similarly, as he worked as a waiter for 1 hour each day this month, he earned a total of 1 * w dollars from his waiter job.

To calculate the combined total dollar amount he earned this month, we can express it as x * t + 1 * w, which represents the earnings from his tutoring job plus the earnings from his waiter job.

This expression provides the total dollar amount Ravi earned based on the given hourly rates and the number of tutoring hours.

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The members of a club are making flags that each use 2/3 yard of fabric.

They have 5 1/3 yards of fabric. Therefore,total of 8 flags can be made.

Here, Divide the total yards of fabric available by the yards of fabric used per flag.

Given: Each flag uses 2/3 yards of fabric.

The total fabric the club has is 5 1/3.

5 1/3 = (5 * 3 + 1) / 3 = 16/3

Now, calculate the number of flags:

Number of flags = Total yards of fabric / Yards of fabric per flag

= (16/3) / (2/3)

= (16/3) * (3/2)

= 16/2

= 8

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Since the fourth derivative of [tex]f(x) = e^(-2x)[/tex] is also [tex]e^(-2x),[/tex] we have:

[tex]|(e^{(-2c)})(x - a)^4| \leq 0.001 * 4[/tex]

The Taylor series is a mathematical representation of a function as an infinite sum of terms that are calculated from the function's derivatives at a specific point. It provides an approximation of a function around a particular point using a polynomial expansion.

The general form of a Taylor series for a function f(x) centered at a point a is:

[tex]f(x) = f(a) + f'(a)(x - a)/1! + f''(a)(x - a)^2/2! + f'''(a)(x - a)^3/3! + ...[/tex]

where f'(a), f''(a), f'''(a), etc., represent the derivatives of the function evaluated at the point a.

To determine the values of x for which the function[tex]f(x) = e^(-2x)[/tex]can be replaced by the Taylor polynomial with an error not exceeding 0.001, we need to consider the remainder term in the Taylor series expansion.

The Taylor series expansion of[tex]f(x) = e^(-2x)[/tex]centered at x = 0 is given by:

[tex]f(x) ≈ 1 - 2x + (2x^2)/2! - (4x^3)/3! + ...[/tex]

The remainder term for the nth-degree Taylor polynomial is given by:

[tex]R_n(x) = (f^(n+1)(c))(x - a)^(n+1)/(n+1)![/tex]

where f^(n+1)(c) is the (n+1)th derivative of f(x) evaluated at some point c between x and a, and a is the center of the Taylor series expansion.

To find the values of x for which the error does not exceed 0.001, we set the remainder term R_n(x) less than or equal to 0.001 and solve for x.

In this case, since the Taylor polynomial is given up to the third-degree term, we consider the remainder term R_3(x):

[tex]R_3(x) = (f^(4)(c))(x - a)^4/4![/tex]

To ensure the error is less than or equal to 0.001, we have:

[tex]|(f^{(4)}(c))(x - a)^4/4!| \leq0.001[/tex]

Simplifying, we get:

[tex]|(f^{(4)}(c))(x - a)^4| \leq 0.001 * 4[/tex]

Since the fourth derivative of [tex]f(x) = e^(-2x) is also e^(-2x),[/tex]we have:

[tex]|(e^{(-2c)})(x - a)^4| \leq 0.001 * 4[/tex]

Now, we can solve for the values of x that satisfy this inequality. However, without knowing the specific range or interval of x, I cannot provide the exact values or interval notation

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To find the probability that a randomly selected film is between 100 and 120 minutes long, we can use the properties of the normal distribution.

First, we calculate the z-scores for the lower and upper bounds of the desired range:

Lower z-score = (100 - 96) / 12 = 0.333

Upper z-score = (120 - 96) / 12 = 2.000

Next, we look up the probabilities associated with these z-scores in the standard normal distribution table. The probability for the lower bound is P(Z < 0.333) and the probability for the upper bound is P(Z < 2.000).

Using the table or a statistical calculator, we find that the probability for the lower bound is approximately 0.6293 and the probability for the upper bound is approximately 0.9772. To find the probability within the desired range, we subtract the lower probability from the upper probability:

P(100 < X < 120) = P(Z < 2.000) - P(Z < 0.333) = 0.9772 - 0.6293 = 0.3479

Therefore, the probability that a randomly selected film is between 100 and 120 minutes long is approximately 0.3479, or 34.79%.

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In the late Roman Republic, individuals would typically ensure they had essential items such as a tunic or clothing appropriate for the occasion, footwear, and possibly a small writing implement like a stylus.

During the late Roman Republic period, individuals would prioritize wearing appropriate clothing, such as a tunic, which was a basic garment worn by both men and women. Footwear, such as sandals or shoes, would also be essential to protect the feet while traveling. Carrying money or valuables was crucial for transactions and personal needs, ensuring they had the means to purchase goods or services.

Additionally, individuals might carry a small writing implement, such as a stylus, for taking notes, marking important information, or engaging in correspondence. These items would have been considered essential for individuals in the late Roman Republic when leaving their homes.

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The purchase of a callable municipal revenue bond at a price of 120 with a 4.37% coupon and maturity of 18 years, followed by the issuer calling the bond at par two years later, is an example of an early redemption due to the issuer's exercise of the bond's call provision.

A callable bond gives the issuer the right to redeem the bond before its maturity date, typically at a predetermined price known as the call price or par value. In this case, the bond was purchased at a price of 120, which means the investor paid 120% of the bond's face value. The bond carries a 4.37% coupon rate, indicating the annual interest payment as a percentage of the bond's face value. After two years, the issuer exercises the call provision and redeems the bond at its par value, effectively ending the bond's term before the original maturity date. This early redemption provides the issuer with the opportunity to refinance the debt at potentially lower interest rates or for other financial reasons.

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Marc's current marginal tax rate can be determined by referring to the U.S. tax rate schedule for the year 2021 based on his taxable income.

To calculate Marc's current marginal tax rate, we need to look at the U.S. tax rate schedule for the year 2021. The tax rate schedule consists of several tax brackets, each with its corresponding tax rate. As taxable income increases, individuals move into higher tax brackets and are subject to higher tax rates. Based on Marc's taxable income of $260,000, we would need to refer to the tax rate schedule to determine his marginal tax rate. As the exact tax rates within the brackets can vary, it's important to consult the specific tax rate schedule for the given year.

By locating the corresponding tax bracket for $260,000 in taxable income, we can identify the applicable tax rate. Marc's current marginal tax rate would be the tax rate associated with the bracket that includes his interest.

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The solution of expression on algebraic fractions is,

⇒ y = 47/21

We have to given that;

Expression to simplify is,

⇒ 5/y + 1/7y - 2/3y = 2

Now, WE can simplify the expression as,

⇒ 5/y + 1/7y - 2/3y = 2

⇒ (35y + y)/7y² - 2/3y = 2

⇒ 36y/7y² - 2/3y = 2

⇒ 36/7y - 2/3y = 2

⇒ (108 - 14) / 21y = 2

⇒ 94 = 21y × 2

⇒ 94 = 42y

Divide both side by 42;

⇒ y = 94 / 42

⇒ y = 47/21

Therefore, The solution of expression on algebraic fractions is,

⇒ y = 47/21

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The warmest temperature on her hike was when she was at the elevation which had 6°C degree. The Option D.

A warm temperature refers to a moderately high temperature characterized by comparatively high temperature.

Among the temperature given, at the warmest temps on the graph which is 6 degree celcius, the elevation was at 450 meter above sea level based on the graph. Therefore, the Option D is correcr.

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You would solve that problem by using one of the Trigonometric functions, setting the degrees equal to 40, and then setting 2 sides equal to the trig function(40).

You could do it in your head or by using a calculator.

Answer:

15.1 m^2

Step-by-step explanation:

Since this is a right triangle we can use trig functions

tan theta = opp side / adjacent side

tan 40 = x / 6

6 tan 40 = x

5.03 =x

To find the area,

A = 1/2 bh  where b is the base and h is the height

A = 1/2 ( 5.03) * 6

A = 15.09 m^2