QUESTION 6, Saturday, October 10th, 2020

I have some geometry questions today. Please include your thoughts or reasoning with your answer. Thanks!

Factorize the following a) 7x-xz+7z-z², b) x^4 + x^2 + 1, c) 10x² - 19xy + 6y², d) 8x² + 12x³y + 6xy² + y², e) a^5-b^5 are given below:

a) 7x - xz + 7z - z² can be factorized as: (x - z)(7 - z)

b) x^4 + x^2 + 1 cannot be factorized further using real numbers. It is a prime polynomial.

c) 10x² - 19xy + 6y² can be factorized as: (2x - 3y)(5x - 2y)

d) 8x² + 12x³y + 6xy² + y² can be factorized as: (2x + y)(4x^2 + 6xy + y)

e) a^5 - b^5 can be factorized using the formula for the difference of fifth powers: (a - b)(a^4 + a^3b + a^2b^2 + ab^3 + b^4)

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While there may not be a specific speed limit for approaching uncontrolled railroad crossings, it is advisable to reduce speed and exercise caution to ensure the safety of yourself and others on the road. Always be aware of your surroundings and be prepared to stop if necessary.

The speed limit when approaching an uncontrolled railroad crossing can vary depending on the jurisdiction and the specific regulations in place. However, in general, it is important to exercise caution and reduce speed when approaching such crossings to ensure safety.Railroad crossings are areas where the railway tracks intersect with roads or highways. Uncontrolled railroad crossings are those that do not have traffic signals or gates to regulate the flow of vehicles when a train is approaching. As a result, drivers need to be particularly vigilant and follow certain guidelines to navigate these crossings safely.

While there may not be a specific speed limit designated for uncontrolled railroad crossings, it is generally recommended to reduce speed and proceed with caution. The purpose of slowing down is to allow for better visibility and to be prepared to stop if necessary. By reducing speed, drivers have more time to react to unexpected situations, such as a train approaching or a vehicle ahead that has stopped for the train.

It is essential to approach uncontrolled railroad crossings with heightened awareness, regardless of the speed limit in the area. Drivers should be prepared to stop if they see or hear a train approaching. They should also check for any warning signs or signals, listen for train horns or whistles, and visually scan for any trains approaching from either direction.In conclusion, while there may not be a specific speed limit for approaching uncontrolled railroad crossings, it is advisable to reduce speed and exercise caution to ensure the safety of yourself and others on the road. Always be aware of your surroundings and be prepared to stop if necessary.

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Using Baye's theorem,  the probability that a randomly selected job applicant who tests positive is a drug user is approximately 0.2332, or 23.32%

Let's define the events:

A: Applicant is a drug user

B: Applicant tests positive

We are given the following information:

P(A) = 0.09 (probability that a potential hire is a drug user)

P(B|A) = 0.77 (sensitivity or true positive rate)

P(B|A') = 0.25 (complement of sensitivity, false negative rate)

P(A') = 1 - P(A) = 1 - 0.09 = 0.91 (probability that a potential hire is not a drug user)

P(B|A') = 0.75 (specificity or true negative rate)

We need to find P(A|B), which is the probability that the applicant is a drug user given that they tested positive.

According to Bayes' theorem:

P(A|B) = (P(B|A) * P(A)) / P(B)

To calculate P(B), we can use the law of total probability:

P(B) = P(B|A) * P(A) + P(B|A') * P(A')

Substituting the given values:

P(B) = (0.77 * 0.09) + (0.25 * 0.91) = 0.0693 + 0.2275 = 0.2968

Now we can calculate P(A|B):

P(A|B) = (0.77 * 0.09) / 0.2968 = 0.0693 / 0.2968 ≈ 0.2332

Therefore, the probability that a randomly selected job applicant who tests positive is a drug user is approximately 0.2332, or 23.32%.

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Answer:

the answer is 4328

Step-by-step explanation:

may God bless you and your family during spring break

Let \(\(a\)\) and \(\(b\)\) be integers such that \(\(ab = 4\)\). We want to prove that \(\((a - b)^3 - 9(a - b) = 0\).\)

Starting with the left side of the equation, we have:

\(\((a - b)^3 - 9(a - b)\)\)

Using the identity \(\((x - y)^3 = x^3 - 3x^2y + 3xy^2 - y^3\)\), we can expand the cube of the binomial \((a - b)\):

\(\(a^3 - 3a^2b + 3ab^2 - b^3 - 9(a - b)\)\)

Rearranging the terms, we have:

\(\(a^3 - b^3 - 3a^2b + 3ab^2 - 9a + 9b\)\)

Since \(\(ab = 4\)\), we can substitute \(\(4\)\) for \(\(ab\)\) in the equation:

\(\(a^3 - b^3 - 3a^2(4) + 3a(4^2) - 9a + 9b\)\)

Simplifying further, we get:

\(\(a^3 - b^3 - 12a^2 + 48a - 9a + 9b\)\)

Now, notice that \(\(a^3 - b^3\)\) can be factored as \(\((a - b)(a^2 + ab + b^2)\):\)

\(\((a - b)(a^2 + ab + b^2) - 12a^2 + 48a - 9a + 9b\)\)

Since \(\(ab = 4\)\), we can substitute \(\(4\)\) for \(\(ab\)\) in the equation:

\(\((a - b)(a^2 + 4 + b^2) - 12a^2 + 48a - 9a + 9b\)\)

Simplifying further, we get:

\(\((a - b)(a^2 + 4 + b^2) - 12a^2 + 39a + 9b\)\)

Now, we can observe that \(\(a^2 + 4 + b^2\)\) is always greater than or equal to \(\(0\)\) since it involves the sum of squares, which is non-negative.

Therefore, \(\((a - b)(a^2 + 4 + b^2) - 12a^2 + 39a + 9b\)\) will be equal to \(\(0\)\) if and only if \(\(a - b = 0\)\) since the expression \(\((a - b)(a^2 + 4 + b^2)\)\) will be equal to \(\(0\)\) only when \(\(a - b = 0\).\)

Hence, we have proved that if \(\(ab = 4\)\), then \(\((a - b)^3 - 9(a - b) = 0\).\)

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The postfix expression of "7+5-3*2(6*7)/4" is "7 5 + 3 2 * 6 7 * 2 * - 4 /". Evaluating the postfix expression gives the result of the expression. The prefix expression for the given infix expression is "/ - + 7 5 * 3 * 2 ( * 6 7 ) 4".

To convert the infix expression "7+5-3*2(6*7)/4" into postfix expression, we follow the rules of operator precedence and associativity. The postfix expression is obtained by placing operators after their operands.

The postfix expression for the given infix expression is:

"7 5 + 3 2 * 6 7 * 2 * - 4 /"

To evaluate the postfix expression, we use a stack data structure. We scan the postfix expression from left to right and perform the corresponding operations.

Starting with an empty stack, we encounter the operands "7" and "5". We push them onto the stack. Then we encounter the operator "+", so we pop the last two operands from the stack (5 and 7), perform the addition operation (7 + 5 = 12), and push the result back onto the stack.

We continue this process for the remaining operators and operands in the postfix expression. Finally, after evaluating the entire expression, the result left on the stack is the final answer.

To convert the infix expression into prefix expression, we follow similar rules but scan the expression from right to left. The prefix expression is obtained by placing operators before their operands.

The prefix expression for the given infix expression is:

"/ - + 7 5 * 3 * 2 ( * 6 7 ) 4"

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The statement "Since there is an infinite number of values a continuous random variable can assume, the probability of each individual value is virtually 0" is True

In the case of a continuous random variable, the probability of any individual value is virtually zero because there are infinite possible values that the variable can take.

Instead, we typically deal with probabilities over intervals or ranges of values.

The probability density function (PDF) represents the likelihood of the variable falling within a specific range of values.

Thus, while individual values are possible, their probabilities are infinitesimally small.

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Step-by-step explanation:

Correlation coefficient is a quantitative measure used to determine the statistical relationships between two or more random variables or observed data values. Here -1.0 states the perfect negative correlation, while 1.0 states the perfect positive correlation. ...

Answer:

11

Step-by-step explanation:

Answer:11

Step-by-step explanation:

because you have to create the equation and solve

The quotient of (5+21) (6-4) and (2+1) is 13/3, expressed in its simplest form

The quotient of two numbers is a way of expressing the ratio of their values. It is the result of dividing one number by the other, and can be written as a fraction or as a decimal.

The quotient of 4 and 8 is 0.5, since 4 divided by 8 is 0.5.

The quotient of (5+21) (6-4) and (2+1) can be expressed as follows:

First, we need to solve each parenthesis separately. The first parenthesis is (5+21), which equals 26. The second parenthesis is (6-4), which equals 2. Therefore, the quotient of (5+21) (6-4) is 26/2, which can be simplified to 13/1.

Now, we need to divide 26/2 by (2+1). The result is 13/3, which is the final quotient.

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As the speed of a ship increases, the time remaining in the journey decreases

This implies that the speed of the ship is inversely proportional to the time

Therefore, this is a negative correlation because the relationship between the speed of the ship and the time remaining is not a direct one

The answer is a negative correlation

Answer:

16.7 units

Step-by-step explanation:

its a 45°-45°-90° right triangle, so n1=4.9

r=4.9\(\sqrt{2}\) =6.9

perimeter = 4.9+4.9+6.9=16.7 units

Answer:

First, take -5x then turn -5 to a positive 5 like so and add it to -6. So, -6+5= -1, so then take -1 + 4 which will equal 4 which is y.

Y=4

Solution of the literal equation 4y-5x=-6 for y is y = (5/4)x - (3/2).

A literal equation are equations which have two or more unknown variables in them. A literal equation can be solved by adding or subtracting or multiplying or divide by same numbers on both sides of the equation in order to get an expression for the required variable.

Given an literal equation 4y - 5x = -6

We need to solve this equation  for y , means separate y and make its coefficient 1

4y-5x =-6

Adding 5x both sides ⇒ 4y-5x+5x = -6 +5x

                                    ⇒ 4y = 5x-6

Divide both sides by 4 , we get

⇒4y/4 = (5x-6)/4

⇒ y = (5/4)x - (6/4)

⇒ y = (5/4)x - (3/2)

∴The solution for the variable y from the given literal equation  4y-5x=-6 is  y = (5/4)x - (3/2)

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Answer:

d

Step-by-step explanation:

3 multiplied by ricks salary minus 150

The x- and y-intercepts of the function both are zero which represents when sold 0 tickets are, the value of sales is 0 and when the value of sales is 0, the number is 0.

A graph can be defined as a pictorial representation or a diagram that represents data or values.

The relationship between the quantity of Fun Pass tickets sold and the amount of the overall sales are represented on the given graph.

Positive and negative functions are performed here, and the meanings are interpreted in the context of the situation.

Therefore, the x- and y-intercepts of the function are zero which represents when sold 0 tickets are, the value of sales is 0 and when the value of sales is 0, the number is 0.

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The hypothesis will be that "If a kid wears braces, then the kid will have a straight teeth".

It should be noted that a hypothesis means a proposed explanation based on reasoning and evidence.

In this case, the hypothesis will be that "If a kid wears braces, then the kid will have a straight teeth".

The conclusion is that kids who wear braces will have straight teeth.

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Answer:

After Multiplying them.

we get 0 as an answer.

Answer:

64

Step-by-step explanation:

Trust me, this is the answer, PLEASE GIVE ME BRAINLIEST

x + y = 150

x - y = 100

______

x = hoodie

y = shoes

x = 150 - y

150 - y = 100 + y

50 = 2y

y = 25

x = y + 100

x = 25 + 100

x = 125

please give brainliest

Answer:

125

Step-by-step explanation:

it's unequal sharing

150-100=50

50/2=25

hoodie=100+25=$125

hope it helps

The probability that a continuous random variable equals any of its values is called Continuous probability distribution.

Continuous probability distribution:

A probability distribution in which the random variable X can take on any value (which is continuous). Since there are infinitely many possible values ​​for X, the probability that X takes on any particular value is zero. So we often talk about a range of values ​​[p(X >0] = 0.50).

An absolutely continuous probability distribution is a probability distribution of real numbers with an uncountable set of possible values, such as the full interval of a solid line, where the probability of any event can be expressed as an integral. More precisely, there exists a function f: R − [0, so that for each interval[ 0,∞] ⊂ R, the probability that X belongs to [a, b] is given by the integral of f over I.

\(P(a\leq X\leq b) = \int\limits^a_b {f(x)} \, dx\)

Since this is the definition of a probability density function, an absolutely continuous probability distribution is exactly equivalent to a probability density function. In particular, the probability that X takes any single value a (i.e. a≤X≤b) is zero because integrals with the same upper and lower bounds are always zero. If the interval [a, b] is replaced by the measurable set A, then the equivalence remains valid.

P(X ∈ A) = \(\int\limits^a_b {f(x)} \, dx\)

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Answer:

452.389342 cubic inches

Step-by-step explanation:

The volume of a sphere is calculated using the formula V = 4/3 pi r^3

to determine the radius, you can notice that 4 spheres take up 24 in in length. This means that the radius of 1 sphere is 24/4/2 = 3 inches.

from there we plug and play: V = 4/3 * pi * 3^3 = 113.097336 cubic inches.

Note that this is only the volume of 1 sphere, so we multiply by 4

and we get 452.389342 cubic inches

Answer:

452.4

Step-by-step explanation:

Radius of each sphere: 24/4/2=3

Formula for volume: (4pir^3)/3

Formula for 4 spheres: 4 times (4pir^3)/3

Substitute 3 for r

The researcher reported the results of a specific experiment to the scientist who conducted it.

A statistical test result yielded a p-value of 0.18. Based on this p-value, the scientist should conclude that the test was not statistically significant because if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 18% of the time.

A p-value is a statistical term that measures how likely a set of data is to occur by chance.

It aids in the interpretation of statistical significance by determining the degree of evidence against a null hypothesis. The p-value is calculated after performing a hypothesis test to decide whether or not a set of data is important.

The null hypothesis, which is often denoted by H0, is the hypothesis that a parameter's value equals a specified value, and it is generally the assumption that researchers seek to reject.

Statistical significance refers to the degree to which an observed effect in a sample reflects a true effect in the general population. It determines if a research hypothesis can be accepted or rejected by measuring the probability of the results happening by chance.

In other words, it refers to the probability that a research finding can be ascribed to chance rather than to an experimental intervention.

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Answer:

\(16 {( \frac{1}{2} x)}^{4} \\ = 16 \times {( \frac{1}{2}) }^{4} {x}^{4} \\ = 16 \times \frac{1}{16} {x}^{4} \\ = {x}^{4} \\ thank \: you\)

Solution:

\(16 \times \bigg ( \frac{x}{2} \bigg)^{4} \\ \\ = 16 \times \bigg( \frac{x^{4} }{2^{4} } \bigg) \\ \\ = 16 \times \frac{ {x}^{4} }{16} \\ \\ = {x}^{4} \\ \\ \)

Therefore answer is x⁴

Hope it helps you :)

Answer:

0.8

Step-by-step explanation:

80 divided by 100 = .8 or 0.8

The equation in spherical coordinates is ρ = 5. This equation represents a sphere centered at the origin with a radius of 5 units in the ρ direction.

To write the equation \(x^2 + y^2 + z^2 = 25\) in spherical coordinates, we need to express x, y, and z in terms of the spherical coordinates (ρ, θ, φ).

In spherical coordinates, ρ represents the distance from the origin to the point, θ represents the azimuthal angle measured from the positive x-axis in the xy-plane, and φ represents the polar angle measured from the positive z-axis.

To transform the Cartesian coordinates (x, y, z) to spherical coordinates, we can use the following equations:

x = ρ sin(φ) cos(θ)

y = ρ sin(φ) sin(θ)

z = ρ cos(φ)

Now let's substitute these equations into the given equation:

\((x^2) + (y^2) + (z^2) = 25\)

(ρ sin(φ) cos(θ))² + (ρ sin(φ) sin(θ))² + (ρ cos(φ))² = 25

ρ² (sin²(φ) cos²(θ) + sin²(φ) sin²(θ) + cos²(φ)) = 25

ρ² (sin²(φ) (cos²(θ) + sin²(θ)) + cos²(φ)) = 25

ρ²(sin²(φ) + cos²(φ)) = 25

ρ²= 25

This simplifies to:

ρ = 5

Therefore, the equation in spherical coordinates is ρ = 5. This equation represents a sphere centered at the origin with a radius of 5 units in the ρ direction.

In spherical coordinates, the equation ρ = 5 describes all points that are at a distance of 5 units from the origin, regardless of the values of θ and φ.

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By using the concept of depreciation, it is obtained that

New population  after 9 years = 24012

What is Depreciation?

Depreciation is the decrease in the value of a population or any asset over a period of time at a certain rate.

The concept of depreciation has been used here

Original population = 28800

Rate of decrease of population = 2%

Time = 9 years

New population  after 9 years = \(28800(1 - \frac{2}{100})^9\)

                                                  = \(28800({1 - \frac{1}{50})^9\\\)

                                                  = \(28800(\frac{49}{50})^9\)

                                                  = 24011.94

                                                  = 24012

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Answer: $150

Step-by-step explanation:

From the question, we are informed that the balance of Stephanies average balance checking account at the beginning of last cycle was $200 and that the only transaction for the cycle was a check that Stephanie wrote for $100 which cleared exactly halfway through the cycle.

Since the $100 check was cleared halfway, the amount that Stephanies checking account will pay interest last cycle will be for us to deduct half of $100 from $200. This will be:

= $200 - 1/2($100)

= $200 - $50

= $150