someone help me on number 7 please

Answer:

\(y=-0.25x-6\)

Step-by-step explanation:

if you look at the graph, the y intercept is -6, so when x is 0, y has to be -6. The slope is -0.25 because the slope is equal to change in y divided by change in x which is -1/4=-0.25

Answer:

a) Because the confidence interval  does not include  0​ it appears that there

is  a significant difference between the mean level of hemoglobin in women and the mean level of hemoglobin in men.

b)There is​ 95% confidence that the interval from  −1.76 g/dL<μ1−μ2<−1.62 g/dL actually contains the value of the difference between the two population means μ1−μ2

c)   1.62 < μ1−μ2< 1.76

Step-by-step explanation:

a) What does the confidence interval suggest about equality of the mean hemoglobin level in women and the mean hemoglobin level in​ men?

Given:

95% confidence interval for the difference between the two population​ means:

−1.76g/dL< μ1−μ2 < −1.62g/dL

population 1 =  measures from women

population 2 =  measures from men

Solution:

a)

The given confidence interval has upper and lower bound of 1-62 and -1.76. This confidence interval does not contain 0. This shows that the population means difference is not likely to be 0. Thus the confidence interval implies that the mean hemoglobin level in women and the mean hemoglobin level in​ men is not equal and that the  women are likely to have less hemoglobin than men. This depicts that there is significant difference between mean hemoglobin level in women and the mean hemoglobin level in​ men.

b)  

There is​ 95% confidence that the interval −1.76 g/dL<μ1−μ2<−1.62 g/dL actually contains the value of the difference between the two population means μ1−μ2.

c)

If we interchange men and women then

                                          1.62 g/dL<μ1−μ2<1.76 g/dL.

There is a significant difference between the mean level of hemoglobin in women and in men.

The confidence interval of the mean is given as:

\(-1.76 g/dL < \mu_1-\mu_2 < -1.62 g/dL\)

The above confidence interval shows that the confidence interval is exclusive of 0.

This means that 0 is not part of the confidence interval

Since the confidence interval is exclusive of 0, then there is a significant difference between the mean level of hemoglobin in women and in men.

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The vertical component of velocity can be zero at specific points in the motion of an object.

What is Velocity?

Velocity is a vector quantity that describes the rate of change of an object's position in space over time. It is defined as the displacement of an object divided by the time interval during which the displacement occurred.

The vertical component of velocity can be zero at specific points in the motion of an object. This occurs when the object reaches the highest point in its vertical motion and begins to fall back down. At this point, the vertical component of velocity changes direction from upward to downward, and its magnitude becomes zero. This moment is known as the "instant of maximum height" or "instant of maximum altitude." Beyond this point, the vertical component of velocity becomes negative, indicating that the object is moving downward.

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The value of the ratio x : y : z is 1/2 : /3 : 5/18

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

x:y = 1/2:1/3 and y:z = 1/5:1/6

Express the ratio properly

So, we have the following representation

x : y = 1/2 : 1/3 and y : z = 1/5 : 1/6

Multiply the ratio y : z = 1/5 : 1/6 by 5/3

So, we have

y : z = 1/3 : 5/18

So, we have

x : y : y : z = 1/2 : 1/3 : 1/3 : 5/18

Remove the repetition

This gives

x : y : z = 1/2 : /3 : 5/18

Hence, the ratio is 1/2 : /3 : 5/18

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Answer:

16

Step-by-step explanation:

Answer:

Please find the required line chart created with MS Excel

Step-by-step explanation:

Question:

The given data are;

3/4, 1 1/2, 2, 1 1/4, 3/4, 2, 1 1/2, 1 1/4, 1 1/2, 1/2, 1

In the question, it is required to create a line plot to represent the data

The given data can be sorted in ascending order in decimal form as follows;

0.5, 0.75, 0.75, 1, 1.25, 1.25, 1.5, 1.5, 1.5, 2

The line chart created with MS Excel is attached.

Answer:

3/4, 1 1/2, 2, 1 1/4, 3/4, 2, 1 1/2, 1 1/4, 1 1/2, 1/2, 1

In the question, it is required to create a line plot to represent the data

The given data can be sorted in ascending order in decimal form as follows;

0.5, 0.75, 0.75, 1, 1.25, 1.25, 1.5, 1.5, 1.5, 2

Step-by-step explanation:

Answer:

6.13 days

Step-by-step explanation:

Hello,

This question directly relates to radioactivity of a substance.

Data,

k = 0.113

Initial mass (No) = 38g

Half life of the substance (T½) = ?

To solve this question, we don't need the value of the initial mass because the variables in half life (T½) formula does not require it.

T½ = ln2 / k

Note : ln2 is a constant derived while k is the decay constant of the substance

T½ = 0.693 / 0.113

T½ = 6.13 days

The half life of the substance is 6.13 days

The measure of angle x is 135 degrees

An angle is formed when two straight lines or rays meet at a common endpoint.

The common point of contact is called the vertex of an angle.

The measure of the angle x can be found as follows:

The angle x is the sum of angle 60 degrees and 75 degrees.

Therefore,

∠x = 60° + 75°

∠x = 60° + 75°

∠x = 135 degrees

Therefore, the measure of angle x is 135 degrees

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so we know the equation to get the total forces is

\(\cfrac{Kg\cdot m}{s^2} ~~ \begin{cases} Kg=kilograms\\ m=meters\\ s=seconds \end{cases}\implies Kg\cdot \cfrac{m}{s^2}\implies Kg\cdot (acceleration)\)

the idea being, well, we have to do unit conversion, we know the object has a mass of 80 grams, hmmm that's not Kilograms, however since there are 1000 grams in a Kg, we can just convert that, and the acceleration of it is 20 m/s², so

\(\stackrel{ Kilograms }{\cfrac{80}{1000}}\cdot \stackrel{ accelaration }{20}\qquad \impliedby \textit{sum of the forces}\)

Answer:

13

Step-by-step explanation:

A number squared is just a number multiplied by itself.

13 x 13 is 169.

Answer is 13.

Hope this helps!

P.S, Brainliest, please, thanks!

Answer:

It might be a because 4 / 7 is 10.5830052443

Step-by-step explanation:

The point of concurrency determined by the three altitudes of any triangle is called the orthocenter of the triangle.

The orthocenter is the intersection of the three altitudes of the triangle. It is a point on the plane of the triangle that is equidistant from the three sides of the triangle.

To find the orthocenter of a triangle, you can draw the altitudes of the triangle and find the point where they intersect. The orthocenter is the point of concurrency for the three altitudes.

An orthocenter of a triangle is a point where the three lines that are perpendicular to the sides of the triangle intersect. These lines are called altitudes of the triangle.

Alternatively, you can use the following formula to find the coordinates of the orthocenter:

Let's say that the vertices of the triangle are A(x1, y1), B(x2, y2), and C(x3, y3). The coordinates of the orthocenter (H) can be found using the following formula:

Hx = ( (y1 - y3) (x1^2 + y1^2 - x3^2 - y3^2) - (y1 - y2) (x1^2 + y1^2 - x2^2 - y2^2) ) / (2 * (y1 - y3) - 2 * (y1 - y2))

Hy = ( (x1 - x3) (x1^2 + y1^2 - x3^2 - y3^2) - (x1 - x2) (x1^2 + y1^2 - x2^2 - y2^2) ) / (2 * (x1 - x3) - 2 * (x1 - x2))

Therefore, The point of concurrency determined by the three altitudes of any triangle is called the orthocenter of the triangle

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          \(\rule{50}{1}\large\textsf{\textbf{\underline{Question:-}}}\rule{50}{1}\)

       Given f(x)=-x+5, find f(-3).

    \(\rule{50}{1}\large\textsf{\textbf{\underline{Answer and how to solve:-}}}\rule{50}{1}\)

We have the function

\(\longmapsto\sf{f(x)=-x+5}\)

We need to find

\(\longmapsto\sf{f(-3)=}\)

\(\longmapsto\sf{f(x)=-(-3)+5}\)

Simplifying,

\(\longmapsto\sf{f(x)=3+5}\)

(which is the exact same thing as 5-3)

Henceforth, We conclude that the answer is

\(\longmapsto\sf{f(-3)=8}\)

#TogetherWeGoFar ~

\(\rule{300}{1}\)

Hey there!

Find f(-3) :

f(-3) = 8 ✅

f(x) = -x + 5

>> Substitute -3 for x in f(x) :

f(-3) = -(-3) + 5

f(-3) = 3 + 5

f(-3) = 8

Therefore, your answer is f(-3) = 8

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Answer:

I solved it for u!

Hope ot helps!!!

Answer:

Step-by-step explanation:

In this question we will solve the polynomials by adding or subtracting the similar terms.

1). (-3x² - 8x + 2) + (-5x² - 9x - 2)

   = (-3x²- 5x²) - (8x + 9x) + (2 - 2)

   = (-8x²) - 17x + 0

   = -8x² - 17x

2). (-2x² + 7x - 1) - (8x² - 6x + 5)

   = (-2x² - 8x²) + (7x + 6x) - (1 + 5)

   = -10x² + 13x - 6

3). (5x²- 5xy - 10y²) + (5x²+ 5xy + 10y²)

   = (5x² + 5x²) + (-5xy + 5xy) + (-10y² + 10y²)

   = 10x²

4). (2 + 8x + 4x²) - (9 + 6x + 2x²)

   = (2 - 9) + (8x - 6x) + (4x² - 2x²)

   = -7 + 2x + 2x²

5). (4x³ + 5x²+ 3x) - (3x³ + 6x²- 1)

   = (4x³ - 3x³) + (5x² - 6x²) + 3x + 1

   = x³- x² + 3x + 1

Answer:

can u add a photo for me to see

Answer:

yes they can

Step-by-step explanation:

Answer:

1. .43 m/s or 26.08 meters per min

5. The total displacement is 0

Step-by-step explanation:

Answer:

2/36 or 1/18

Step-by-step explanation:

rolling two dice produces 36 outcomes

rolling a 3 and a 6 is one outcome

rolling a 6 and a 3 is a second outcome

The order of the dogs from lightest <-> heaviest is Goldie, Fluffy, Bluebell.

A weight refers to the body's relative mass or the quantity of matter contained by it.

Given that:

Goldie weighs 36 pounds.

Bluebell weighs 1 1/6 times as much as Goldie. This is:

= (6/6 + 1/6) * 36

= 42 pounds.

Fluffy weighs 7/8 times as much as Goldie. This is:

= 36 * 7/8

= 31.5 pounds.

Full question:

Samantha has three dogs. Goldie weighs 36 pounds. Bluebell weighs 1 1/6 times as much as Goldie. Fluffy weighs 7/8 times as much as Goldie. Which gives the order of the dogs from lightest to heaviest?

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Answer: I believe D.

Answer:

I assume the inequality is

\(\sf{ \dfrac{2c}{3} + 1 > 7}\)

\(\sf{ \dfrac{2c}{3} > 7-1}\)

\(\sf{ 2c> 18}\)

\(\sf{ c > 9}\)

True. In simple linear regression analysis, the least squares regression line is a line that best fits the given data by minimizing the sum of the squared differences between the actual y values and the predicted y values.

This line is obtained by finding the slope and intercept that minimize the sum of the squared residuals.

The sum of the squared differences, also known as the sum of squared residuals or the sum of squared errors, measures the overall distance between the observed y values and the predicted values on the regression line. By minimizing this sum, the least squares regression line provides the best-fitting line that represents the relationship between the dependent variable (y) and the independent variable (x) in a linear manner.

Therefore, it is true that in simple linear regression analysis, the least squares regression line minimizes the sum of the squared differences between actual and predicted y values.

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True. Multiplication of fractions is indeed different from multiplication of whole numbers. When multiplying fractions, you need to multiply both the numerators (the top numbers) and the denominators (the bottom numbers) separately. The resulting product is a fraction with the multiplied numerators as the new numerator and the multiplied denominators as the new denominator.

1. Multiply the numerators: Multiply the numbers on the top (the numerators) of the fractions together. This gives you the new numerator of the resulting fraction.

2. Multiply the denominators: Multiply the numbers on the bottom (the denominators) of the fractions together. This gives you the new denominator of the resulting fraction.

3. Simplify, if possible: If the resulting fraction can be simplified, divide both the numerator and the denominator by their greatest common divisor (the largest number that divides evenly into both). This step ensures that the fraction is in its simplest form.

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Answer:

b

Step-by-step explanation:

Since the given discriminant is 10, hence the roots will be real, irrational, and unequal

The discriminant is used to determine the nature of the roots of a quadratic equation. The formula for finding the discriminant is expressed as:

D = b^2 - 4ac

Since the given discriminant is 10, hence the roots will be real, irrational, and unequal

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The scale factor of dilation can be found by using the formula\((x_0=\frac{kx_1-x_2}{k-1}, y_0=\frac{ky_1-y_2}{k-1})\).

What is dilation?

A dilation is a transformation that creates an image that has the same shape as the original but is larger.

• An enlargement is a dilation that produces a larger image.

• A reduction is a dilation that produces a smaller image.

• A dilation expands or contracts the original figure.

A dilation is a stretch or a shrink in the size and location of a figure or point.

The scale factor in a dilation is the amount by which the figure is stretched or shrunk.

The center of dilation is a reference point used to appropriately scale the dilation of a figure. Given a point on the pre-image, \((x_1, y_1)\)and a corresponding point on the dilated image \((x_2, y_2)\)and the scale factor,

k, the location of the center of dilation, \((x_0,y_0)\) is

\((x_0=\frac{kx_1-x_2}{k-1}, y_0=\frac{ky_1-y_2}{k-1})\)

Hence, the scale factor of dilation can be found by using the formula\((x_0=\frac{kx_1-x_2}{k-1}, y_0=\frac{ky_1-y_2}{k-1})\).

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1) The eigenvalues of Mi are ±1.

2) All Mi are traceless.

In the given problem, we are dealing with Hermitian matrices Mi that satisfy the equation MiMj + MiMi = 2δijI, where δij is the Kronecker delta symbol and I represents the identity matrix.

To show that the eigenvalues of Mi are ±1, we can consider the eigenvector equation Mi|v⟩ = λ|v⟩, where |v⟩ is an eigenvector of Mi and λ is the corresponding eigenvalue.

Let's assume λ is an eigenvalue of Mi and |v⟩ is the associated eigenvector. Taking the inner product of both sides with ⟨v| (the conjugate transpose of |v⟩), we have:

⟨v|Mi|v⟩ = λ⟨v|v⟩

Since Mi is Hermitian, ⟨v|Mi|v⟩ is a real number. Similarly, ⟨v|v⟩ is also a real number because the inner product of a vector with its conjugate transpose is always real.

Now, let's evaluate the left-hand side of the equation using the given properties of Mi:

⟨v|Mi|v⟩ = ⟨v|MiMi + MiMi|v⟩/2 = ⟨v|2I|v⟩/2 = 2⟨v|v⟩/2 = ⟨v|v⟩

Substituting this back into the eigenvector equation, we have:

λ⟨v|v⟩ = ⟨v|v⟩

Since ⟨v|v⟩ is a nonzero real number (the norm of a vector is nonzero unless the vector is the zero vector), we can divide both sides of the equation by ⟨v|v⟩ to obtain:

λ = 1

Therefore, the eigenvalues of Mi are ±1.

To show that all Mi are traceless, we need to demonstrate that the trace of each matrix Mi is zero. The trace of a matrix is defined as the sum of its diagonal elements.

Consider the trace of Mi:

Tr(Mi) = Tr(MiMi + MiMi)/2 = Tr(2δiiI)/2 = Tr(2I)/2 = Tr(I) = dim(I)

Since the identity matrix I has dimensions equal to the size of Mi (4x4 in this case), the trace of I is equal to the dimension of I. Therefore, Tr(Mi) = dim(I).

However, the trace of Mi is also given by the sum of its eigenvalues. From Step 1, we know that the eigenvalues of Mi are ±1. Since the sum of ±1 is zero, the trace of Mi is also zero.

Hence, we have shown that all Mi are traceless.

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Approximately 97 cans must be sampled to achieve a margin of error of 0.01 ounce.

To estimate the number of cans that must be sampled for the margin of error to be equal to 0.01 ounce, we'll use the formula for the sample size in a confidence interval:

\(n = \left(\frac{Z \cdot \sigma}{E}\right)^2\)

where n is the sample size, Z is the Z-score for the desired confidence level (95% in this case), σ is the standard deviation (0.05 ounce), and E is the margin of error (0.01 ounce).

For a 95% confidence interval, the Z-score is approximately 1.96. Plugging the values into the formula, we get:

n = \(\(\left(\frac{{1.96 \cdot 0.05}}{{0.01}}\right)^2\)\)
n ≈ (9.8)²
n ≈ 96.04

Since we can't have a fraction of a can, we'll round up to the nearest whole number. Therefore, a sample size of approximately 97 cans is needed for the margin of error to be equal to 0.01 ounce with a 95% confidence interval.

This question should be provided as:

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