1. Calculate the area of the following parallelogram:

28 in²
26 in²
40 in²
30 in²

The statement "with respect to the 3-sigma rule used in reliability analysis, studies have shown that even experts tend to under-predict the range in parameter values (max-min). however, this is conservative because it leads to a smaller estimate of reliability" is true because studies have shown that experts tend to under-predict the range in parameter values when using the 3-sigma rule, leading to a conservative estimate of reliability.

The 3-sigma rule is a widely used method in reliability analysis that assumes the range of parameter values is within three standard deviations of the mean value. However, studies have shown that experts tend to under-predict the range of parameter values.

This under-prediction can result in a conservative estimate of reliability because it leads to a smaller range of possible outcomes. In other words, the estimated reliability is likely to be lower than the actual reliability. Therefore, it is important to take into account the potential for under-prediction when using the 3-sigma rule and to use other methods to estimate reliability as well.

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Answer: B A

Step-by-step explanation:

Answer:

To complete the square for the equation -5x² + 10x = -315, we can follow these steps:

Move the constant term (-315) to the right side of the equation:

-5x² + 10x + 315 = 0

Divide both sides of the equation by the coefficient of the x^2 term (-5) to get a coefficient of -1 for the x^2 term:

x² - 2x - 63 = 0

Add the square of half the coefficient of the x term to both sides of the equation:

x² - 2x + 1 - 1 - 63 = 0 + 1

Simplify the left side of the equation by factoring the quadratic trinomial and combining like terms:

(x - 1)² - 64 = 1

Add 64 to both sides of the equation:

(x - 1)² = 65

So the intermediate step in completing the square for -5x² + 10x = -315 is:

(x - 1)² - 64 = 1

This is the result of adding the square of half the coefficient of the x term (-1) to both sides of the equation and simplifying.

The Standard Normal Table is a tool that is used to calculate probabilities associated with the standard normal distribution.

When using the Standard Normal Table, we can find the area to the left of z < -2.34 by first locating the value -2.3 in the left-hand column of the table and the value -0.04 in the top row of the table.

Then, we find the intersection of the row and column to locate the corresponding value of 0.0099. This value represents the area to the left of -2.3 on the standard normal distribution.

To find the area to the left of -2.34, we need to adjust the value by subtracting the area to the left of -2.34 from the area to the left of -2.3.

The standard normal distribution is symmetric around the mean of 0. It means the area to the right of -2.3 is the same as the area to the left of 2.3.

Therefore, the area to the left of z < -2.34 is the area to the left of -2.3 (0.0099) minus the area between -2.34 and -2.3 (0.0040), which equals 0.0059. So, the area to the left of z < -2.34 is 0.0059.

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the cost per mile over the course of a year for a $24,000 car that depreciates 20%, with costs shown in the table, and that has been driven for 10,000 miles is $0.59 per mile. Answer B is correct.

To calculate the cost per mile, we need to add up all the expenses for the car and divide by the total miles driven.

First, we need to calculate the total depreciation for the car:

Depreciation = 20% * $24,000 = $4,800

Next, we can calculate the total expenses for the car:

Total expenses = Gas + Insurance + Oil + Registration + Depreciation

Total expenses = $550 + $400 + $90 + $100 + $4,800

Total expenses = $5,940

Finally, we can calculate the cost per mile:

Cost per mile = Total expenses / Miles driven

Cost per mile = $5,940 / 10,000

Cost per mile = $0.594 or $0.59 (rounded to the nearest cent)

Therefore, the cost per mile over the course of a year for a $24,000 car that depreciates 20%, with costs shown in the table, and that has been driven for 10,000 miles is $0.59 per mile. Answer B is correct.

Note: Option D is not a possible answer because the cost per mile cannot be greater than the total expenses divided by the miles driven, which in this case is $0.594.

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a). There are a total of 10 students in the class, according to the dot plot.

b). The students' ages, which vary from 1 to 5, indicate that this is not an adult swimming lesson.

c). Thus, just 20% (2/10) of the students are toddlers or preschoolers.

Numbers are mathematical units of measurement and labelling. It is an ethereal idea that can stand in for many different material quantities, including time, money, and distance. Real numbers, complex numbers, and even irrational numbers can all be considered numbers in mathematics.

Numbers are frequently employed in mathematical equations to express relationships and to represent data. They are also employed in the development of models, patterns, and data analysis.

a). There are a total of 10 students in the class, according to the dot plot.

b). The programme is a swimming lesson for adults.

No, it doesn't seem to be an adult swimming lesson based on the dot plot. The students' ages, which vary from 1 to 5, indicate that this is not an adult swimming lesson.

c). The majority of the students are between the ages of 2 and 3.

No, it doesn't seem like half of the students are between the ages of 2 and 3, according to the dot plot. There are two students who are two years old, one who is three, two who are four, and five who are five. Thus, just 20% (2/10) of the students are toddlers or preschoolers.

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The table that shows a relation that represents a function is: table D in the options given.

To determine if a relation is a function, we need to check if each value of x corresponds to a unique value of y.

A. In this relation, x = 3 is paired with two different values of y (-2 and -1) which means this relation is not a function.

B. In this relation, each value of x does not corresponds to only one value of y, so this relation is not a function.

C. In this relation, -3 and 1 are paired with two different values of y (-3 and 1), which means this relation is not a function.

D. In this relation, each value of x corresponds to only one value of y, so this relation is a function.

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The system of equations are solved and x = 1 and y = -2

Given data ,

Let the system of equations be A and B

where 5x + 4y = -3

y = 2x - 4

Substituting the value of y in equation (1) , we get

5x + 4 ( 2x - 4 ) = -3

On simplifying the equation , we get

5x + 8x - 16 = -3

Adding 16 on both sides , we get

13x = 13

Divide by 13 on both sides , we get

x = 1

Now , when x = 1

y = -2

Hence , the equations are solved

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The equation of the function is f(x) = x² + 3, where x represents the input value and f(x) represents the output value. Graph is in below figure.

The domain of a function is the set of all possible input values (also called the independent variable) for which the function is defined. In other words, it is the set of values that can be plugged into the function to produce a valid output value (also called the dependent variable).

The equation of the function is f(x) = x² + 3, where x represents the input value and f(x) represents the output value.

To graph this function, we can plot points by choosing values of x and computing the corresponding values of f(x). Since the domain of the function is [0, ∞), we will only consider non-negative values of x.

x f(x)

0 3

1 4

2 7

3 12

4 19

We can plot these points on a coordinate plane and connect them with a smooth curve to obtain the graph of the function:

Note that the graph is a parabola that opens upwards and passes through the point (0, 3).

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The margin of error is an important factor in determining the sample size needed to estimate a parameter, it is not the only factor - False.

Other factors that need to be considered include the level of confidence desired, the variability of the population being sampled, and the size of the population.

The margin of error is the amount of error that is acceptable in the estimate of the parameter. The smaller the margin of error desired, the larger the sample size needed.

A higher level of confidence requires a larger sample size, as there is less room for error in the estimate. The variability of the population being sampled also plays a role in determining the sample size needed.

Finally, the size of the population being sampled also affects the sample size needed.

A smaller population requires a smaller sample size, while a larger population requires a larger sample size to ensure a representative sample.

In summary, while the margin of error is an important factor in determining the sample size needed to estimate a parameter, it is not the only factor.

Other factors that need to be considered include the level of confidence desired, the variability of the population being sampled, and the size of the population.

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Answer:

[tex]x = \sqrt{ {16}^{2} + {21}^{2} } = \sqrt{256 + 441} = \sqrt{697} = 26.4[/tex]

1)  The lines AC and BO are parallel (by alternate interior angles), so BMED is a trapezoid.

2)  CD = 2AD.

1) To prove that BMED is a trapezoid, we need to show that BM || ED.

Since O is the midpoint of AM, we have OB || MD (as OB and MD are both perpendicular to AM).

Also, since E is the midpoint of DC, we have DE || AC (as DE and AC are both perpendicular to BC).

Therefore, to show that BM || ED, it is enough to show that AC || OB.

We know that OB is a transversal to the parallel lines BM and AM, so we have:

∠OBD = ∠MBC (corresponding angles)

Similarly, we have:

∠OAD = ∠ABC (corresponding angles)

Since ∠MBC = ∠ABC (because [AM] is the median), we have:

∠OBD = ∠OAD

Therefore, the lines AC and BO are parallel (by alternate interior angles), so BMED is a trapezoid.

2) To prove that D is the midpoint of [AE], we need to show that AD = DE.

Since [AM] is the median, we have:

AD = MC

Also, since E is the midpoint of DC, we have:

DE = EC

So it is enough to show that MC = EC.

Since O is the midpoint of AM, we have:

OM = MA/2

But MA = MC + AC/2 (because [AM] is the median), so we have:

OM = (MC + AC/2)/2

= MC/2 + AC/4

Also, since E is the midpoint of DC, we have:

OE = EC/2

But AC = 2DC (because [AM] is the median), so we have:

OE = EC/2 = AC/4

Therefore, we have:

OM = OE

So triangle OME is isosceles, and we have:

∠OEM = ∠OME

But ∠OED = ∠OEM (because DE || AC), so we have:

∠OED = ∠OME

Therefore, triangles ODE and OME are similar, so we have:

OD/OM = OE/OE

= 1

Therefore, OD = OM.

But we also have:

OM = MA/2 = MC/2 + AC/4

= AD/2 + AC/4 (because [AM] is the median)

So we have:

OD = OM = AD/2 + AC/4

= AD/2 + DC/2 (because AC = 2DC)

= (AD + DC)/2

= AE/2 (because E is the midpoint of DC)

Therefore, we have shown that D is the midpoint of [AE].

Moreover, we have:

CD = AE/2 = AD + DC/2 = AD + AC/4 (because AC = 2DC)

= AD + MC/2 (because [AM] is the median)

= AD + AD/2 (because AD = MC)

= 3AD/2

So we have CD = 2AD.

3) To prove that OD = 4BD, we need to show that BD = (1/4)OM.

Since [AM] is the median, we have:

BM = MC

Also, since O is the midpoint of AM, we have:

OM = BM/2 + AM/2

= BM/2 + 2BM/2 (because [AM] is the median)

= 3BM/2

Therefore, we have:

BD = BM - MD

= MC - MD

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The graph of the linear equation is on the image at the end.,

To graph a line, we need to find two points on the line and then connect them with a line.

Evaluating in x = 0 we will get.

y = (-2/5)*0 - 2 = -2

evaluating in x = 5

y = (-2/5)*5 - 2 = -4

Then we have the points (0, -2) and (5, -4)

And the graph of the linear equation can be seen in the image at the end.

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Answer:  The experimental probability of an event happening is defined as the number of times the event occurs divided by the total number of trials.

In this case, the number of cinnamon jelly beans in the scoop is 6. The total number of jelly beans in the scoop is 5+22+6=33.

Therefore, the experimental probability of scooping a cinnamon jelly bean from the bin is:

P(cinnamon) = number of cinnamon jelly beans / total number of jelly beans

P(cinnamon) = 6 / 33

P(cinnamon) = 2 / 11

So the experimental probability of scooping a cinnamon jelly bean from the bin is 2/11, which can be written as a fraction.

Step-by-step explanation:

The length of segment TU is given as follows:

TU = 24 units.

The length of segment TU is obtained applying the trapezoid midsegment theorem, which states that the length of the midsegment of the trapezoid is equals to the mean of the length of the bases of the trapezoid.

The parameters for this problem are given as follows:

Hence the length of TU is obtained as follows:

36 = (x + 48)/2

x + 48 = 72

x = 24.

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23. The value for x in triangle is 11.14

24. The value for x in the triangle is 18.3

25. The value for x = 30.4

27 The value for x = 63.413 degrees

23

Cos θ= adj/ hyp

cos 42= x/15

x = 15 cos 42

x = 11.14

24

tan θ= opp/ adj

tan 31= 11/ x

x(tan 31)= 11

x = 11/tan 31

x = 18.3

25

cos θ= adj/ hyp

cos 18= 29/x

x(cos 18) = 29

x = 29/ cos 18

x = 30.4

27

sin x = opp/ hyp

sin x = 17/19

sin x = 0.8947

x = 63.413 degrees

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Answer:

Step-by-step explanation: There are 2.54 centimeters in a inch, for every inch you need to multiply it by 2.54.  

2.54 x 12 = 30.48

Answer = 30.48

A 12inch ruler is 30cm.

If you look at a ordinary see through plastic ruler one side says 12 inches and the other, 30 centimetres by one millimeter.

Answer:

82 and 95

Step-by-step explanation:

Most repeated

Answer:

Step-by-step explanation:

On Monday, the total amount paid for CDs = 149 * $9 = $1341

On Tuesday, the total amount paid for CDs = 263 * $9 = $2367

Therefore, the total amount paid for CDs on these two days = $1341 + $2367 = $3708.

The probability that Tara selects 1 pen and then 1 marker is 6/30 (option b).

To solve this problem, we need to first find the total number of ways that Tara can select two items from the box without replacement.

In this case, we have n = 6 (3 pens, 2 markers, and 1 highlighter) and r = 2. Therefore, the total number of ways that Tara can select two items is:

6C2 = 6! / 2! (6 - 2)! = 15

Next, we need to find the number of ways that Tara can select a pen first and then a marker.

Therefore, the number of ways to select a pen first is 3, and the number of ways to select a marker second is 2. The total number of ways to select a pen first and then a marker is:

3 x 2 = 6

Finally, we can find the probability of selecting a pen first and then a marker by dividing the number of ways to select a pen first and then a marker by the total number of ways to select two items:

6 / 15 = 2 / 5

Therefore, the correct answer is option B) 6/30, which can be simplified to 2/5.

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Answer: 12 units

Step-by-step explanation: see both shapes are the same just one is flipped and its small meaning the first shape without numbers is only double of the shape with numbers so you answer would be 12 units

small shape x 2 gives all your answers to the big shape

TOO

EASY

BYE

The two solutions to the system of equations are (x,y) = (7/5,-3) and (x,y) = (144/65,-12/13).

What is quadratic equation?

it's a second-degree quadratic equation which is an algebraic equation in x.

We can use substitution to solve this system of equations.

First, we solve the second equation for one of the variables, say x:

5x + 12y + 13 = 0

5x = -12y - 13

x = (-12/5)y - (13/5)

Next, we substitute this expression for x into the first equation:

x² + y² = 1

[(-12/5)y - (13/5)]² + y² = 1

Expanding the square and simplifying, we get:

y² + [(144/25)y² + (312/25)y + (169/25)] + y² = 1

(26/5)y² + (312/25)y + (144/25) = 0

Multiplying both sides by 25 to eliminate the fractions:

26y² + 312y + 144 = 0

Dividing by 4 to simplify:

6.5y² + 78y + 36 = 0

Using the quadratic formula:

y = (-b ± sqrt(b² - 4ac)) / 2a

where a = 6.5, b = 78, and c = 36.

Plugging in these values:

y = (-78 ± sqrt(78² - 4(6.5)(36))) / 2(6.5)

y = (-78 ± sqrt(4761)) / 13

y = (-78 ± 69) / 13

y = -3 or -12/13

If y = -3, then substituting into the equation for x gives:

x = (-12/5)(-3) - (13/5) = 7/5

So one solution is (x,y) = (7/5,-3).

If y = -12/13, then substituting into the equation for x gives:

x = (-12/5)(-12/13) - (13/5) = 144/65

So another solution is (x,y) = (144/65,-12/13).

Therefore, the two solutions to the system of equations are (x,y) = (7/5,-3) and (x,y) = (144/65,-12/13).

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To find an expression for P(t), we can use the two given data points to create a system of equations. We can assume that the population is growing exponentially, which means that the population at time t is given by:

P(t) = a(b)^t

where a and b are constants that we need to determine.

Using the first data point, we have:

840,000 = a(b)^1

which simplifies to:

840,000 = ab

Using the second data point, we have:

882,000 = a(b)^2

We can solve for a in terms of b by dividing the second equation by the first equation:

882,000/840,000 = (a(b)^2)/(ab)

Simplifying, we get:

1.05 = b

Substituting this value of b into the first equation, we get:

840,000 = a(1.05)

Solving for a, we get:

a = 800,000

Therefore, the expression for P(t) is:

P(t) = 800,000(1.05)^t

This means that the city's population t years from now can be calculated by multiplying the initial population of 800,000 by 1.05 raised to the power of t.

Answer:

Step-by-step explanation:

city. The city's population has beengrowing, and based on recent trends,Jim expects it to continue growingexponentially. This table shows theexpected population in the next twoyears.Time (years)Population840,000882,000Time (years)12Find an expression for P(t), the city'spopulation t years from now. Write youranswer in the form P(t) = a(b)t, where aand b are integers or decimals. Do notround.P(t) =

Using trigonometric functions, we can find the value of the missing sides as follows:

AC = 15.48units.

AB = 9units.

The right triangle's angle serves as the domain input value for the six fundamental trigonometric operations, which return a range of numbers as their output. The angle, expressed in degrees or radians, is the domain of the trigonometric function of f(x) = sin, also referred to as the "trig function," and its range is [-1, 1]. In terms of their domain and scope, the other functions are comparable. Algebra, geometry, and calculus all make extensive use of trigonometric functions.

Here in the question,

As per the trigonometric function:

Sin30° = opposite side/hypotenuse

⇒ 1/2 = AB/18

Cross multiplying:

⇒ AB = 18/2

⇒ AB = 9units.

Now,

Cos30° = adjacent side/hypotenuse

⇒ 0.86 = AC/18

Cross multiplying:

⇒ AC = 15.48units.

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Answer:

11.502

Step-by-step explanation:

The total amount of money she would have at the end of her shift would be 0.75x + 10

If the barista makes an average of $0.75 from each customer and she has $10 in her tip jar at noon, we can use this information to estimate how much money she will have at the end of her shift if she serves more customers.

Let's assume that the barista serves "x" more customers during her shift, and that each customer gives her an average of $0.75 in tips. The total amount of money she would make from the tips of these "x" customers would be 0.75x.

Adding the $10 she already has in her tip jar, the total amount of money she would have at the end of her shift would be:

Total = 0.75x + 10

The amount of money the barista would have at the end of her shift would depend on the number of customers she serves after noon. For instance, if she serves 20 more customers after noon, then the total amount of money she would have at the end of her shift would be:

Total = 0.75(20) + 10 = $25

Therefore, the amount of money the barista would have in her tip jar at the end of her shift depends on the number of customers she serves and the amount of money each customer gives her in tips.

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If one zero of the polynomial 3x^2 + 8x + k is  the reciprocal of the

other, then k = 3 by applying product of roots formula.

The quadratic polynomial is 3x^2 + 8x + k.

Let the roots of  3x^2 + 8x + k be m and n where m and n are reciprocal of each other. Therefore, n = 1/m

Thus, the product of roots is = m*n = m*(1/m) = 1 ____(1)

The general equation of a quadratic equation can be written as,

ax^2 + bx + c = 0

where a and b are coefficients of x^2 and x respectively and c is a constant term.

From product of roots formula we know that,

Product of roots =constant term/ coefficient of x^2 = c/a

Therefore, for polynomial is 3x^2 + 8x + k we get,

Product of roots = k/3 ____(2)

From equating equation (1) and (2) we get,

k/3 = 1

⇒ k = 3

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The given question is incomplete, the complete question is

"If one zero of the polynomial 3x^2+8x+k is the reciprocal of the other, then find the value of k."

In the long run, new technology can have a significant impact on the long-run average total cost (LRATC) of a company.

The LRATC curve represents the lowest possible average cost at which a company can produce a particular level of output in the long run. New technology can reduce the costs of production by improving efficiency, reducing waste, and increasing productivity, leading to lower LRATC. This can lead to a shift in the LRATC curve downward, indicating that the company can now produce the same output at a lower cost than before. This can make the company more competitive and increase its profitability.

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The result of rotating the point [-5, 2] by 90 degrees counterclockwise is the point [2, -5].

Rotation is a transformation in geometry that involves turning or spinning an object around a fixed point called the center of rotation. The center of rotation remains stationary while all the points of the object move along circular paths, at the same angle and distance from the center.

To rotate a point [x/y] counterclockwise by 90 degrees, we can use a 2x2 matrix of the form:

[ 0 -1 ]

[ 1 0 ]

To multiply this matrix by a point [x/y], we can use the following matrix multiplication:

[ 0 -1 ] [ x ] [ -y ]

[ 1 0 ] [ y ] = [ x ]

So, if we have a point [x/y] and we want to rotate it 90 degrees counterclockwise, we can multiply it by the matrix [ 0 -1 ; 1 0 ] to get the new point [-y/x].

To rotate a point 90 degrees counterclockwise using a matrix, we need to represent the point as a column matrix and then multiply it by the 2x2 rotation matrix.

Assuming that the point is [x, y] = [-5, 2], we can represent it as a column matrix:

| -5 |

| 2 |

To rotate the point counterclockwise by 90 degrees, we can use the following 2x2 rotation matrix:

| 0 -1 |

| 1 0 |

Multiplying the rotation matrix by the column matrix representing the point gives:

| 0 -1 | | -5 | | 2 |

| 1 0 | ×| 2 | = | -5 |

So the result of rotating the point [-5, 2] by 90 degrees counterclockwise is the point [2, -5].

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