Someone pls help me I will make you brain




Which of the following does not represent a function?

Answer:

Yes, its going to be different because the base is only a piece of the whole shape, not the entire thing. Hope this helps! plz mark brainliest if possible :)

Step-by-step explanation:

Answer: W=12m

Step-by-step explanation:

Answer:

(f+g)(x) = 3x^2+x+1

Step-by-step explanation:
It may look hard at first, but all the question is asking you to do is add both of the equations together.

(f+g)(x) = (3x^2-1) + (x+2)
(f+g)(x) = 3x^2+x+1

The solution to the system of equations is (x, y) = (-3/11, -1/11).To find the values of x and y that satisfy the system of equations:

8x + 9y = -3 ...(Equation 1)

-6x + 7y = 1 ...(Equation 2)

We can solve this system of equations using various methods such as substitution or elimination. Let's use the elimination method:

To eliminate the x terms, we can multiply Equation 1 by 6 and Equation 2 by 8:

48x + 54y = -18 ...(Equation 3)

-48x + 56y = 8 ...(Equation 4)

Now, we can add Equation 3 and Equation 4:

(48x - 48x) + (54y + 56y) = -18 + 8

110y = -10

y = -10/110

y = -1/11

Substituting the value of y = -1/11 into Equation 1:

8x + 9(-1/11) = -3

8x - 9/11 = -3

8x = -3 + 9/11

8x = (-33 + 9)/11

8x = -24/11

x = -3/11

Therefore, the solution to the system of equations is (x, y) = (-3/11, -1/11).

So, the values of x and y that satisfy the system of equations are x = -3/11 and y = -1/11.

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The 90% confidence interval is from  −11.447 to −5.913.

Given that: Sample size of fraud, n1 = 26

Sample size of firearms, n2 = 35

Sample mean of fraud, x1 = 8.94 months

Sample mean of firearms, x2 = 17.62 months

Sample standard deviation of fraud, s1 = 3.87 months

Sample standard deviation of firearms, s2 = 4.12 months T

he two samples are independent

We need to find the 90% confidence interval for the difference between the mean times served by prisoners in the fraud and firearms offense categories. Now, the point estimate of the difference in means of two populations is:

x1 − x2 = 8.94 − 17.62 = −8.68

Using the pooled t-interval formula, we get:

[8.68 − tα/2  × Sp(1/n1 + 1/n2), 8.68 + tα/2 × Sp(1/n1 + 1/n2)]

Here, the degrees of freedom is df = n1 + n2 - 2 = 59 at the 0.10 level of significance. tα/2 = t0.05 = 1.671,

from t-distribution table Pooled variance Sp

= [(n1 - 1) × s1² + (n2 - 1) × s2²] / (n1 + n2 - 2)= [(26 - 1) × 3.87² + (35 - 1) × 4.12²] / (26 + 35 - 2)≈ 17.07

Therefore, the 90% confidence interval is given as follows:

[8.68 - 1.671 × (sqrt(17.07) × sqrt(1/26 + 1/35)), 8.68 + 1.671 × (sqrt(17.07) × sqrt(1/26 + 1/35))]=[−11.447, −5.913] (rounded to three decimal places)

Hence, the required confidence interval is from −11.447 to −5.913.

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The stress function satisfies the conditions of compatibility for a two-dimensional problem.

Given stress function is 50x² - 60xy - 70y²

To determine whether the stress function satisfies the conditions of compatibility for a two-dimensional problem, it is required to find the strains and then check for compatibility equations.

Strain components are given as,

εx = ∂υ/∂x + (du/dx)

εy = ∂υ/∂y + (du/dy)

γxy = ∂υ/∂y + (du/dx)

Here,

υ = 50x² - 60xy - 70y²

du/dx = 100x - 60

ydu/dy = -60x - 140y

∂υ/∂x = 100x - 60y

∂υ/∂y = -60x - 140y

∂²υ/∂y² = -140

∂²υ/∂x² = 100

Now,εx = 100x - 60

yεy = -140y - 60

xγxy = -60y - 60x

Taking derivative of εy w.r.t x,

∂(εy)/∂x = -60

Similarly, taking derivative of εx w.r.t y,

∂(εx)/∂y = -60

∴ The stress function satisfies the conditions of compatibility for a two-dimensional problem.

Stress components are given as,

σx = (C11εx + C12εy)

σy = (C21εx + C22εy)

τxy = (C44γxy)

Here,C11 = C22 = 100, C12 = C21 = -60 and C44 = 0

Therefore,

σx = 100(100x - 60y) - 60(-140y - 60x)

= 19600x - 8800

yσy = -60(100x - 60y) + 100(-140y - 60x)

= -19600y + 8800x

τxy = 0

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Polly Petunia, the Chief Horticulturalist for the Southwest region, is using a method called stratified random sampling to survey amateur gardeners in her region.

Stratified random sampling involves dividing the population into distinct groups or strata based on certain characteristics that are relevant to the research objective.

In this case, Polly is dividing the population of amateur gardeners in the Southwest region into three strata based on the states: Arizona, New Mexico, and Texas.

Once the population is divided into strata, Polly selects a random sample from each stratum. She sends her survey to 150 randomly selected gardeners from each state, resulting in a total sample size of 450 gardeners (150 from each state).

By using stratified random sampling, Polly ensures that her sample is representative of the population in terms of the geographic distribution across the three states.

This method allows her to obtain insights specific to each state while still maintaining a random selection within each stratum.

Using stratified random sampling helps increase the precision and accuracy of the survey results.

It allows Polly to make more accurate inferences and draw conclusions about the water conservation practices of amateur gardeners in each state, as well as the overall Southwest region.

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It is false as the left and right ends of the normal probability distribution extend indefinitely, approaching but never touching the horizontal axis.

The statement is false because the left and right ends of the normal probability distribution do not extend indefinitely. In reality, the normal distribution is defined over the entire real number line, meaning it extends infinitely in both the positive and negative directions. However, as the values move further away from the mean (the center of the distribution), the probability density decreases. This means that although the distribution approaches but never touches the horizontal axis at its tails, the probability of observing values extremely far away from the mean becomes extremely low. Thus, while the distribution theoretically extends infinitely, the practical probability of observing values far from the mean decreases rapidly.

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Answer:

1.7 pages per minute

Step-by-step explanation:

divide 68 by 40 and you get 1.7

Answer: 3.5 cups

To solve, we'll need to multiply because we know the SIZE of the groups and the amount of groups but we don't know the total amount.

The equation of the circle centered at the origin and passing through the point (0, 4) is \($x^2+y^2=16$\).

Let the center of the circle be represented as (h,k) and the radius of the circle be represented as r.

The general equation of a circle is given by \($$(x-h)^2+(y-k)^2=r^2$$\)

where the center of the circle is (h, k), and the radius is r

The equation of the circle with center (5, 9) and radius 11 is \($$(x-5)^2+(y-9)^2=11^2$$\)

To get the equation of the circle centered at the origin and passing through the point (0, 4), the center of the circle is the origin, which means (h, k) = (0, 0), and the radius r is given as the distance from the origin to (0, 4).

That distance is 4 units.

Therefore, the equation of the circle can be given by \($$(x-0)^2+(y-0)^2=4^2$$\)

Simplifying the equation gives:\($$x^2+y^2=16$$\)

Therefore, the equation of the circle centered at the origin and passing through the point (0, 4) is \($x^2+y^2=16$\).

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The measures in the circle given in the image above are calculated as:

1. m<PSQ = 130°;   2. m<AQS = 30°; 3. m(QR) = 100°; 4. m(PS) = 110°; 5. (RS) = 70°.

In order to find the measures in the circle shown, recall that according to the inscribed angle theorem, the measure of intercepted arc is equal to the central angle, but is twice the measure of the inscribed angle.

1. m<PSQ = m<PAQ

Substitute:

m<PSQ = 130°

2. Find m<PBQ:

m<PBQ = 1/2(m(PQ) + m(RS)) [based on the angles of intersecting chords theorem]

Substitute:

m<PBQ = 1/2(130 + 2(35))

m<PBQ = 100°

m<AQS = 180 - [m<BAQ + m<PBQ]

Substitute:

m<AQS = 180 - [(180 - 130) + 100]

m<AQS = 30°

3. m(QR) = m<QAR

Substitute:

m(QR) = 100°

4. m(PS) = 180 - m(RS)

Substitute:

m(PS) = 180 - 2(35)

m(PS) = 110°

5. m(RS) = 2(35)

m(RS) = 70°

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Answer:

14

Step-by-step explanation:

7.95\cdot 6+1.45\cdot \:x=\left(6+x\right)3.4

x=14

Answer:

I Do Not know but I think 200

Answer:770000

Step-by-step explanation:

That how much they made

Answer:

€8988.75

Step-by-step My bad that's not the answer

The natural polymers are matched with their uses as;

Natural rubber; Option 2

Starch; Option 4

Silk; Option 5

DNA; Option 3

Cellulose; Option 1

Natural polymers are simply defined as materials that are wide spread in nature or are also extracted from plants or animals.

Different natural polymers like silk, DNA, cellulose, starch, natural rubber have their distinct uses.

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The perimeter of triangle is 66.24 units.

What is triangle?

In Euclidean geometry, any 3 points, once non-collinear, verify a unique triangle and at the same time, a unique plane

Main body:

according to question :

c = 28

let the vertices be A,B,C

∠A= 30°

by using trigonometric ratios,

BC/ AB = sin30°

AB = C = 28

BC/28 = sin30°

BC = 28*sin30°

BC= 28*(1/2)

BC = 14

similarly

AB /CA = cos 30°

28/CA = √3/2

CA = 28*√3/2

CA = 14/√3

CA = 24.24

Hence , perimeter = AB +BC +CA = 28+14+24.24

                              =66.24 units

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The sum of the two solutions is equal to 17/5.

Here we want to solve the quadratic equation:

5x^2 - 16x + 3 = 0

Using the quadratric formula, we will get the solutions:

\(x = \frac{16 \pm \sqrt{(-16)^2 - 4*3*5} }{2*5} \\\\x = \frac{16 \pm14 }{10}\)

Then the two solutions of the quadratic equation are:

x = (16 + 14)/10 = 30/10 = 3

x = (16 - 14)/10 = 2/10 = 2/5

The sum is: 3 + 2/5 = 3 + 2/5 = 15/5 + 2/5 = 17/5

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Answer: the ansner is d

Step-by-step explanation:

The expression representing the total value of the coins specified is given by: Option D : 0.05n + 0.10d

You can represent the unknown amounts by the use of variables. Follow whatever the description is and convert it one by one mathematically. For example if it is asked to increase some item by 4 , then you can add 4 in that item to increase it by 4. If something is for example, doubled, then you can multiply that thing by 2 and so on methods can be used to convert description to mathematical expressions.

For the given case, we've got to find the value of the amount those coins make up together.

The price (in dollars) of specific coins are:

Since, it is given that there are n nickels and d dimes, thus, total amount is

Total amount = $(0.05 + 0.05+ ... + 0.05 (n times)) +

                         $(0.10 + 0.10 + ... + 0.10 (d times) )

Total amount = $ (0.05 × n + 0.10 × d) = 0.05n + 0.10d in dollars)

(we don't write symbols like of currency generally, and understand it from context. Also, sign of multiplication is often hidden if there are non numeric symbols and numbers being multiplied are written together)

Hence, The expression representing the total value of the coins specified is given by: Option D : 0.05n + 0.10d

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Answer:

you are correct'v'

Step-by-step explanation:

in the first column it adds the next odd number, 1, 3, 5,7

and in the 2nd it mutiplies by 2 so it would be faster by a whole lot

The total cost before the sales tax was 19.828 pounds.

For a party, Jordan purchased 3.8 pounds of turkey, 2.2 pounds of cheese, and 3.6 pounds of egg salad.

We have to determine the total cost before sales tax.

As per the question, we have prices as:

cost of turkey = 3.95 per pound

cost of egg cheese = 1.3 per pound

cost of egg salad = 0.89 per pound

The total cost of turkey = 3.8 × 3.95  = 15.01 pounds

The total cost of cheese = 2.2 × 1.3 = 2.86 pounds

The total cost of egg salad = 2.2 × 0.89 = 1.958 pounds

The total cost before sales tax = 15.01 + 1.958 +2.86

Apply the addition operation, and we get

The total cost before sales tax = 19.828 pounds

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The question seems to be incomplete the correct question would be:

Jordan bought 3.8 pounds of turkey, 2.2 pounds of cheese, and 3.6 pounds of egg salad for a party. If prices are 3.95 per pound turkey, 1.3 per pound cheese and 0.89 per pound egg salad What was the total cost before sales tax?

Answer:

15x+30y-220

Step-by-step explanation:

Took the test!

Answer:

The person above is correct I got it right on edge quiz 2021

Step-by-step explanation:

!!!!!!!hope I helped lol

Answer:

a

Step-by-step explanation:

.

a) Linear Interpolation Spline for the data points are -

-2 <= x < -1: y = -x + 0

-1 <= x < 0: y = x + 2

0 <= x < 1: y = x + 2

1 <= x <= 2: y = -x + 4

b) Quadratic Interpolation Spline for the data points are -

-2 <= x <= -1: y = -x² - 2x + 2

-1 <= x <= 0: y = 2x² + 2

0 <= x <= 1: y = x² + 2x + 2

1 <= x <= 2: y = x² + 2x + 2

a) Linear Interpolation Spline:

To find the linear interpolation spline, we need to determine the line segments that connect adjacent data points.

Given data points:

X = [-2, -1, 0, 1, 2]

Y = [2, 1, 2, 3, 2]

Step 1: Determine the slopes between adjacent points

m1 = (Y[1] - Y[0]) / (X[1] - X[0]) = (1 - 2) / (-1 - (-2)) = -1 / 1 = -1

m2 = (Y[2] - Y[1]) / (X[2] - X[1]) = (2 - 1) / (0 - (-1)) = 1 / 1 = 1

m3 = (Y[3] - Y[2]) / (X[3] - X[2]) = (3 - 2) / (1 - 0) = 1 / 1 = 1

m4 = (Y[4] - Y[3]) / (X[4] - X[3]) = (2 - 3) / (2 - 1) = -1 / 1 = -1

Step 2: Determine the y-intercepts of the line segments

b1 = Y[0] - m1 × X[0] = 2 - (-1) × (-2) = 2 - 2 = 0

b2 = Y[1] - m2 × X[1] = 1 - 1 × (-1) = 1 + 1 = 2

b3 = Y[2] - m3 × X[2] = 2 - 1 × 0 = 2

b4 = Y[3] - m4 × X[3] = 3 - (-1) × 1 = 3 + 1 = 4

Step 3: Define the linear interpolation spline for each segment

For the first segment (-2 <= x < -1):

y = m1 × x + b1 = -1 × x + 0

For the second segment (-1 <= x < 0):

y = m2 × x + b2 = x + 2

For the third segment (0 <= x < 1):

y = m3 × x + b3 = x + 2

For the fourth segment (1 <= x <= 2):

y = m4 × x + b4 = -x + 4

b) To find the quadratic interpolation spline, we will use quadratic polynomial equations to interpolate between the given data points.

Given data points:

X = [-2, -1, 0, 1, 2]

Y = [2, 1, 2, 3, 2]

Step 1: Determine the coefficients of the quadratic polynomials

We will find three quadratic polynomials, each interpolating between three consecutive data points.

For the first quadratic polynomial (interpolating points -2, -1, and 0):

Using the formula y = ax² + bx + c, we substitute the given data points to form a system of equations:

4a - 2b + c = 2

a - b + c = 1

c = 2

Solving the system of equations, we find a = -1, b = -2, and c = 2.

Thus, the first quadratic polynomial is y = -x² - 2x + 2.

For the second quadratic polynomial (interpolating points -1, 0, and 1):

Using the same process, we find a = 0, b = 2, and c = 2.

Thus, the second quadratic polynomial is y = 2x² + 2.

For the third quadratic polynomial (interpolating points 0, 1, and 2):

Using the same process, we find a = 1, b = 2, and c = 2.

Thus, the third quadratic polynomial is y = x² + 2x + 2.

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The margin of error for the survey, rounded to the nearest tenth, is approximately 4.0% when expressed as a percentage.

To determine the margin of error for a survey at the 95% confidence level, we need to calculate the standard error. The margin of error represents the range within which the true population proportion is likely to fall.

The formula for calculating the standard error is:

Standard Error = sqrt((p * (1 - p)) / n)

where p is the sample proportion and n is the sample size.

In this case, the sample proportion is 64% (or 0.64) since 64% of the 1350 surveyed residents support the plan.

Plugging in the values:

Standard Error = \(\sqrt{(0.64 * (1 - 0.64)) / 1350)}\)

\(= \sqrt{(0.2304 / 1350)} \\= \sqrt{(0.0001707)}\)

≈ 0.0131

Now, to find the margin of error, we multiply the standard error by the appropriate critical value for a 95% confidence level. The critical value corresponds to the z-score, which is approximately 1.96 for a 95% confidence level.

Margin of Error = z * Standard Error

= 1.96 * 0.0131

≈ 0.0257

Finally, to express the margin of error as a percentage, we divide it by the sample proportion and multiply by 100:

Margin of Error as Percentage = (Margin of Error / Sample Proportion) * 100

= (0.0257 / 0.64) * 100

≈ 4.0%

Therefore, the margin of error for this survey, expressed as a percentage to the nearest tenth, is approximately 4.0%.

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Answer:

\(\displaystyle \int^x_0\sin(3t^2)\,dt\approx x^3-\frac{27}{42}x^7\)

Step-by-step explanation:

Recall the MacLaurin series for sin(x)

\(\displaystyle \sin(x)=x-\frac{x^3}{3!}+\frac{x^5}{5!}-...\)

Substitute 3t²

\(\displaystyle \displaystyle \sin(3t^2)=3t^2-\frac{(3t^2)^3}{3!}+\frac{(3t^2)^5}{5!}-...=3t^2-\frac{3^3t^6}{3!}+\frac{3^5t^{10}}{5!}-...\)

Use FTC Part 1 to find degree 7 for F(x)

\(\displaystyle \int^x_0\sin(3t^2)\,dt\approx\frac{3x^3}{3}-\frac{3^3x^7}{7\cdot3!}\\\\\int^x_0\sin(3t^2)\,dt\approx x^3-\frac{27}{42}x^7\)

Hopefully you remember to integrate each term and see how you get the solution!

False.

The statement is incorrect because neither the z nor the t distribution is necessarily skewed symmetric. While they are both bell-shaped and have asymptotic tails, the shape of the distribution depends on the degrees of freedom for the t distribution and the mean and standard deviation for the z distribution.

The z and t distributions share several properties, which include:

1. Skewed: Both distributions are not skewed, as they are symmetric around 0.
2. Symmetric around 0: Both the z (standard normal) and t distributions are symmetric around 0, which means that they have equal probability on both sides of 0.
3. Asymptotic tails: Both distributions have asymptotic tails, which means that the tails of the distributions approach but never touch the horizontal axis.
4. Bell-shaped: Both the z and t distributions are bell-shaped, with a peak at the center (0) and tails extending to the left and right.

So, the correct properties for both z and t distributions are: symmetric around 0, asymptotic tails, and bell-shaped.

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A z-score represents the number of standard deviations a data point is away from the mean. A score that is 2.5 standard deviations below the mean would have a z-score of -2.5 that is option D.

A z-score is a statistical measure that indicates how many standard deviations a particular data point is away from the mean of a distribution. It is calculated using the formula:

z = (x - μ) / σ

Where:

z is the z-score,

x is the value of the data point,

μ is the mean of the distribution, and

σ is the standard deviation of the distribution.

If a score is 2.5 standard deviations below the mean, it means that the value of x is 2.5 times the value of σ below the mean. In other words, it is located in the left tail of the distribution.

Since the z-score represents the number of standard deviations away from the mean, a score that is 2.5 standard deviations below the mean would have a z-score of -2.5. The negative sign indicates that the score is below the mean.

So, if we substitute the values into the z-score formula:

z = (x - μ) / σ

-2.5 = (x - μ) / σ

This equation represents the z-score being -2.5, indicating that the score is 2.5 standard deviations below the mean.

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Answer:

you can use apps like socratic to get the answer i do this before i come to brainly

Step-by-step explanation: