PLEASE HELP I’m bad at math

A.Find the greatest common factor GCF of 42 and 12
B.Use the GCF to factor 42 + 12

Please be quick if you can

Answer:

9

my bad I realized mistake

Answer:

perimeter of square =4×side

36 inches =4×side

36 inches/4 =side

9 inches =side

The $130,000 would be considered as Statistic.

In statistics, a population refers to the entire group of individuals or items of interest, while a sample is a subset of the population. A parameter is a numerical value that describes a characteristic of a population.

In this scenario, the survey results are based on a sample of 10,000 graduates out of a total population of 200,000 graduates. The average salary of $130,000 is calculated from the data collected within this sample. Since it is derived from the sample, it is considered a statistic.

A parameter would be used to describe the average salary of the entire population of 200,000 graduates if data were collected from all of them. However, in this case, the given information only pertains to the subset of the sample.

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Answer:

Step-by-step explanation:

Total cost is $26 add x-pieces each $1.50:

Given the trigonometric identity: sin (π/2 + x) = cos x. We are to show that it can be derived from compound angle formulas for sine and cosine functions.

In order to prove the identity using the compound angle formulas, we have to start by recalling the formulas for sin(A + B) and cos(A + B).The compound angle formulas are given as:$$\begin{aligned}\sin (A+B)&=\sin A\cos B+\cos A\sin B\\\cos(A+B)&=\cos A\cos B-\sin A\sin B\end{aligned}$$

Let us set A = π/2 and B = x. Hence, A + B = π/2 + x. Then, we can write:$$\begin{aligned}\sin \left(\frac{\pi}{2}+x\right)&=\sin\frac{\pi}{2}\cos x+\cos\frac{\pi}{2}\sin x \\&= \cos x\end{aligned}$$And, $$\begin{aligned}\cos\left(\frac{\pi}{2}+x\right)&=\cos\frac{\pi}{2}\cos x - \sin\frac{\pi}{2}\sin x \\&= -\sin x\end{aligned}$$

Therefore, sin(π/2 + x) = cos x, as desired.

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To determine whether the relationship between conscientiousness and performance is best described as linear or curvilinear, a statistical analysis can be conducted.

To begin the analysis, calculate the correlation coefficient between conscientiousness scores and job performance ratings. This will provide an initial indication of the relationship's direction and strength. A positive correlation suggests a linear or curvilinear relationship, while a weak or non-existent correlation may indicate no clear relationship.

Next, perform a regression analysis to model the relationship between conscientiousness and performance. Fit a linear regression model and assess the goodness of fit using metrics like R-squared.

If the linear model yields a high R-squared value and the residuals exhibit random patterns, it suggests a linear relationship between the variables. However, if the linear model produces a low R-squared and the residuals show a non-random pattern, it indicates a potential curvilinear relationship.

If the analysis indicates that the linear assumption is incorrect and a curvilinear relationship exists, it has implications for validity evidence and selection decision-making. Traditional selection methods that rely solely on linear relationships may not accurately predict job performance for individuals with extreme levels of conscientiousness.

Validity evidence may need to be re-evaluated, and selection procedures could be adjusted to consider the curvilinear nature of the relationship. Incorporating additional assessments or modifying selection criteria may be necessary to capture the nuances of the relationship and make more informed selection decisions.

In summary, to determine the nature of the relationship between conscientiousness and performance, conduct a statistical analysis involving correlation and regression. If a curvilinear relationship is found, it can impact the validity of selection decisions and require adjustments to selection procedures to accommodate the non-linear nature of the relationship.

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Answer:

x = 8/√3

Step-by-step explanation:

We solve that above question using the trigonometric function of sin

Sin theta = Opposite/Hypotenuse

Theta = 60°

Opposite = 4

Hypotenuse = x

Hence,

Sin 60 = 4/x

Cross Multiply

sin 60 × x = 4

x= 4/sin 60

in rational form

sin 60 = √3/2

Hence, x = 4/ √3/2

= 4 ÷ √3/2

= 4 × 2/√3

= 8/√3

To determine the number of lengths of PVC pipe to be used, we need to divide the total distance to be covered (54 meters) by the length of each PVC pipe (6 meters) and round up to the nearest whole number.

Number of lengths of PVC pipe = Total distance / Length of each PVC pipe

Number of lengths of PVC pipe = 54 meters / 6 meters

Number of lengths of PVC pipe = 9

Therefore, the number of lengths of PVC pipe to be used is 9.

So, the answer is option c. 9.

The moment of inertia depends on the distribution of masses relative to the axis of rotation. It is a measure of an object's resistance to rotational motion. The formula for the moment of inertia varies depending on the specific shape and distribution of masses.

If you can provide more details about the arrangement of masses and the axis of rotation, I can help you derive the expression for the moment of inertia in terms of m and l.

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Answer:

$1632

Step-by-step explanation:

Given data

Principal= $1200

Rate= 12%

Time= 3 years

The simple interest expression is given as

A= P(1+rt)

substitute

A=1200(1+0.12*3)

A=1200(1+0.36)

A=1200*1.36

A=$1632

Hence the amount is $1632

the mean score for a critical reading test, using Excel, the probability that a random sample of 500 students will have a mean score of more than 590 can be calculated to be approximately 0.408.

To calculate the probabilities using Excel, we can utilize the standard normal distribution. First, we need to convert the sample means to z-scores by using the formula: z = (sample mean - population mean) / (population standard deviation / sqrt(sample size)). For the sample mean of more than 590, we can calculate the probability of z being greater than the corresponding z-score using the formula "=1-NORM.S.DIST(z-score,TRUE)". In this case, the z-score is (590 - 580) / (115 / sqrt(500)), which gives approximately 0.408.

Similarly, for the sample mean of less than 575, we calculate the probability of z being less than the corresponding z-score using the formula "=NORM.S.DIST(z-score,TRUE)". The z-score is (575 - 580) / (115 / sqrt(500)), which gives approximately 0.084.

Therefore, the probability that a random sample of 500 students will have a mean score of more than 590 is approximately 0.408, and the probability that the sample mean is less than 575 is approximately 0.084.

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Answer:

320 odd three.

Step-by-step explanation:

9 but we cannot place the digits that are used in the two other digits and we can place only 7 digits. However, the result is not correct, because there are 320 odd three-digits numbers with different digits.

The equation of the tangent plane to the parametric surface at the point (2, 5, 0) is x + 20y + z - 102 = 0.

To find the equation of the tangent plane to the given parametric surface at the point (2, 5, 0), we need to compute the partial derivatives and evaluate them at the given point.

The parametric surface is defined by the equations:

x = u + v

y = 5u^2

z = u - v

First, we find the partial derivatives with respect to u and v:

∂x/∂u = 1

∂x/∂v = 1

∂y/∂u = 10u

∂y/∂v = 0

∂z/∂u = 1

∂z/∂v = -1

Next, we evaluate the partial derivatives at the given point (2, 5, 0):

∂x/∂u = 1

∂x/∂v = 1

∂y/∂u = 10u = 10(2) = 20

∂y/∂v = 0

∂z/∂u = 1

∂z/∂v = -1

At the point (2, 5, 0), the partial derivatives are:

∂x/∂u = 1

∂x/∂v = 1

∂y/∂u = 20

∂y/∂v = 0

∂z/∂u = 1

∂z/∂v = -1

The equation of the tangent plane can be written as:

(x - x₀) (∂x/∂u) + (y - y₀) (∂y/∂u) + (z - z₀) (∂z/∂u) = 0,

where (x₀, y₀, z₀) is the given point.

Substituting the values, we have:

(x - 2)(1) + (y - 5)(20) + (z - 0)(1) = 0.

Simplifying further, we get:

x - 2 + 20(y - 5) + z = 0.

Expanding and rearranging the terms, the equation of the tangent plane to the parametric surface at the point (2, 5, 0) is:

x + 20y + z - 102 = 0.

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Answer:

9 sec.

Step-by-step explanation:

I think you wrote the equations incorrectly.  It probably is

[tex]h = -16t^{2} + 144t + 100[/tex]

If that is true, then [tex]100 = -16t^{2} + 144t + 100[/tex]

                                    0 = -16[tex]t^{2}[/tex] + 144t

                                       -16t(t - 9) = 0

                                            t = 0 or t = 9

Using Green's theorem the flux of the field F across the ellipse is 0, indicating that there is no net flow across the ellipse.

To find the flux of the field F = a × i - 3y × j outward across the ellipse, we can use Green's theorem. Green's theorem relates the flux of a vector field across a closed curve to the circulation of the field around the curve.

Let's denote the ellipse as C, which is parameterized by x = a cos(t) and y = b sin(t), where a and b are the semi-major and semi-minor axes of the ellipse, and t varies from 0 to 2π.

Calculate the curl of the vector field F:

∇ × F = (∂Fₓ/∂y - ∂Fᵧ/∂x) k

= (-3)k

Determine the area enclosed by the ellipse using Green's theorem:

The flux of F across the ellipse is equal to the circulation of F around the ellipse:

∮C F · dr = ∬R (∇ × F) · dA

Since the curl of F is -3k, the flux simplifies to:

∮C F · dr = ∬R (-3k) · dA

= -3 ∬R dA

= -3A

Therefore, the flux of F across the ellipse is -3 times the area enclosed by the ellipse.

Find the area enclosed by the ellipse:

The equation of the ellipse is given as x = a cos(t) and y = b sin(t).

To find the limits of integration, we note that t varies from 0 to 2π, which represents one complete revolution around the ellipse.

∬R dA = ∫₀²π ∫₀²π (a cos(t))(b) dt

= ab ∫₀²π cos(t) dt

= ab [sin(t)]₀²π

= ab (sin(2π) - sin(0))

= 0

Therefore, the area enclosed by the ellipse is 0.

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Hi there!

[tex]\large\boxed{(-\infty, \infty)}}[/tex]

We are given the function:

[tex]f(x) = a\sqrt[3]{bx-c}+d[/tex]

This is the transformation form of a cubic root function. Recall these properties of cubic root functions:

Domain: -∞ < x < ∞ (all real numbers)

Range: -∞ < x < ∞ (all real numbers)

Therefore, the range of the given function is all real numbers, or on (-∞, ∞).

Answer:

if r= to 13.8 so the answer is 598.28

Answer:

£4244.83

Step-by-step explanation:

Use the compound amount formula:

A = P(1 + r)^t.  Here, P = £4000, r = 0.02 and t = 3 yrs

So:  A = £4000(1 + 0.02)^3, which comes to:

       A = £4000(1.061) = £4244.83

Answer:

1) 345    2) 62    3) 36    4) 51     5) 96      6) 142

Step-by-step explanation:

I hope you and your 3rd or 4th grader self enjoy the answers i gave you.

Answer:

EF = 8

Step-by-step explanation:

BC is half of AB, which means that DE will be half of EF. So if DE is 4, which is half of EF, then EF must be 8.

hope this helped! :)

Here are the characteristics of Quadratic Functions

Axis of symmetry

x and y-intercepts

Zeroes

vertex

Point symmetric to y-intercept

One Mol of any gas occupies a volume of 22.4

We have been given the number of miles of hydrogen and the volume of any gas at STP

Therefore you can use that and substitute it into the formula to calculate the Volume of hydrogen for that number of moles

Answer:

65,000 grams

Step-by-step explanation:

Because 1000 grams is in 1 kilogram, you would multiply the 65 kilograms by 1,000 to convert it to grams.

So to convert 65 kilograms to grams you would do:

65 * 1,000 = 65,000 grams

Yikes i dont know this but thanks for the coins C:

Answer:

26

Step-by-step explanation:

Well since a car can travel 78 miles Using 3 gallons

78/3=26

26 miles for each gallon

Answer:

26

Step-by-step explanation:

The unit rate refers to the distance the car can travel using 1 gallon of gas. One way to solve this is to create an algebraic equation like [tex]78=3x[/tex]. Then, to find the unit rate isolate x by dividing both sides by 3. This means that the unit rate is 26.

Answer:

It is called the maximum value.

Step-by-step explanation:

The highest value on the domain of the function is called its maximum value.

The domain and range are defined for a relation and they are the sets of all the x-coordinates and all the y-coordinates of ordered pairs respectively. For example, if the relation is, R = {(1, 2), (2, 2), (3, 3), (4, 3)}, then:

Domain = the set of all x-coordinates = {1, 2, 3, 4}

Range = the set of all y-coordinates = {2, 3}

The maximum value of a function is the place where a function reaches its highest point, or vertex, on a graph. There is no point above the maximum value of the function. Thus the highest point on the graph is known as the maximum value of the domain of the function.

The maximum value is one of the extreme values of the domain of the function. The other extreme value is known as the minimum value. It is on one side of the graph and the maximum value is on the other side of the graph.

Therefore, the highest value on the domain of the function is called its maximum value.

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1. The range of the graph is 28.

2. The equation of the midline is y = -0.45, the amplitude of the sinusoidal graph is 4.7.

1. To determine the range of a sinusoidal graph with a maximum point at (-22, 9) and a midline of y = -5, we need to find the minimum point of the graph.

Since the midline is y = -5, the average of the maximum and minimum values of the graph will be -5. In other words, the midpoint between the maximum point and the minimum point will lie on the midline.

Let's assume the minimum point is (x, y). Since the maximum point is (-22, 9), the midpoint between the maximum and minimum points can be calculated as:

Midpoint = (x + (-22))/2, (y + 9)/2

Setting the midpoint equal to the midline value, we have:

-5 = (x - 22)/2, (y + 9)/2

Simplifying the equations:

x - 22 = -10

y + 9 = -10

Solving for x and y, we get:

x = 12

y = -19

Therefore, the minimum point is (12, -19).

The range of the graph can be calculated as the difference between the maximum and minimum y-values:

Range = 9 - (-19)

     = 28

Therefore, the range of the graph is 28.

2. If the range of a sinusoidal function is -5.6 ≤ y ≤ 3.8, we can determine the equation of the midline and the amplitude of the graph.

The midline of the graph is the horizontal line that divides the range equally. In this case, the midline will be the average of the maximum and minimum values:

Midline = (3.8 + (-5.6))/2

       = -0.9/2

       = -0.45

Therefore, the equation of the midline is y = -0.45.

The amplitude of a sinusoidal function is half the range of the graph. In this case, the amplitude can be calculated as:

Amplitude = (3.8 - (-5.6))/2

         = 9.4/2

         = 4.7

Therefore, the amplitude of the graph is 4.7.

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Answer:

Step-by-step explanation:

To determine the number of possible pairs of people in a group of 23, you can use the concept of combinations. The formula to calculate combinations is given by:

C(n, r) = n! / (r!(n - r)!)

where C(n, r) represents the number of combinations of choosing r items from a set of n items, and the exclamation mark (!) denotes the factorial of a number.

In this case, you want to find the number of combinations of 2 people chosen from a group of 23. Using the formula, the calculation would be:

C(23, 2) = 23! / (2!(23 - 2)!)

        = 23! / (2! * 21!)

        = (23 * 22 * 21!) / (2 * 1 * 21!)

        = (23 * 22) / (2 * 1)

        = 23 * 11

        = 253

Therefore, there are 253 possible pairs of people that can be formed in a group of 23.

Answer:

3c + 14d

Step-by-step explanation:

Hello There!

We can simplify this expression by combining like terms

Now what are like terms?

They are terms that have the same variable ex. 4a and 2a are like terms as they have the same variable (a)

Now lets look back at the expression and see if there are any like terms

which there are (4c and -c) and (6d and 8d)

so lets combine them

4c - c =3c

6d + 8d = 14d

so the simplified version would be 3c + 14d

Answer:

B) 3c+14d

Step-by-step explanation:

We use the addition property for the following question

First we rearrange the following problem and we get

4c-c+6d+8d

The easiest way is to just add and subtract or if you want have a better understanding, you can factor our the like terms which gives us

(4-1)c+(6+8)d

and then we can simplify to get

3c+14d

Answer:

the answer is D

Step-by-step explanation:

y=[tex]x^{2}[/tex]+1