100 points! Mhanifa please help! Look at the picture attached. I will mark brainliest. Random answers will be reported guys.

Answer:

No. The margin of error only includes sampling variability.

Step-by-step explanation:

The margin of error would be considered for the sampling error

In the case when some adults does not have telephones so it is called as error selection bias this is not a sampling error

The selection bias, unresponse bias and the response would be the examples of an error but it is not a sampling errors

So there is no margin of error as it only involved the variability in the sampling

Answer:

2(1-x)+3x = 2-x

Step-by-step explanation:

Distribute 2 to 1 and -x --->  (2-2x)+3x

Combine Like Terms ---> 2-x

So 2(1-x)+3x = 2-x

Answer (assuming it can be in point-slope form):

\(y-7 = 6(x-2)\)    

Step-by-step explanation:

Use the point-slope formula \(y-y_1 = m (x-x_1)\) to write the equation of the line in point-slope form. All you need to do is substitute \(m\), \(x_1\), and \(y_1\) for real values.

Since \(m\) represents the slope, substitute 6 in its place. Since \(x_1\) and \(y_1\) represent the x and y values of one point the line intersects, take the x and y values of (2,7) and substitute them into the formula as well. So, substitute 2 for \(x_1\) and 7 for \(y_1\). This gives the following equation and answer:

\(y-7 = 6(x-2)\)

Answer:

100

Step-by-step explanation:

In a 45-45-90 triangle, the hypotenuse is always larger than either of the legs by a factor of \(\sqrt{2}\). x is therefore:

\(100\sqrt{2}\div \sqrt{2}=100\)

Hope this helps!

Answer: $12 will be left

Step-by-step explanation:

Step 1

Total money  = Cash at hand + Cash withdrawn from account

= $27 + $32

=$59

Total Money spent = Cost of shirt + Cost of jeans

= $18 +$29

=$47

Step 2

Money left = Initial Total Money at hand  - Total Money spent

$59- $47

=$12

To eliminate the roots in 1.1 and 1.2, we can use trigonometric substitution. In 1.1, we can substitute x = 4 sin(theta) to eliminate the root of 4. In 1.2, we can substitute z = 7 sin(theta) to eliminate the root of 7.

1.1. V64+2 + 1 We can substitute x = 4 sin(theta) to eliminate the root of 4. This gives us:

V64+2 + 1 = V(16 sin^2(theta) + 2 + 1) = V16 sin^2(theta) + V3 = 4 sin(theta) V3 1.2. V4z2 – 49

We can substitute z = 7 sin(theta) to eliminate the root of 7. This gives us:

V4z2 – 49 = V4(7 sin^2(theta)) – 49 = V28 sin^2(theta) – 49 = 7 sin(theta) V4 – 7 = 7 sin(theta) (2 – 1) = 7 sin(theta)

Here is a more detailed explanation of the substitution:

In 1.1, we know that the root of 4 is 2. We can substitute x = 4 sin(theta) to eliminate this root. This is because sin(theta) can take on any value between -1 and 1, including 2.

When we substitute x = 4 sin(theta), the expression becomes V64+2 + 1 = V(16 sin^2(theta) + 2 + 1) = V16 sin^2(theta) + V3 = 4 sin(theta) V3

In 1.2, we know that the root of 7 is 7/4. We can substitute z = 7 sin(theta) to eliminate this root. This is because sin(theta) can take on any value between -1 and 1, including 7/4.

When we substitute z = 7 sin(theta), the expression becomes: V4z2 – 49 = V4(7 sin^2(theta)) – 49 = V28 sin^2(theta) – 49 = 7 sin(theta) V4 – 7 = 7 sin(theta)

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Answer:

2. 5 miles

Step-by-step explanation:

Given that:

Rental cost = $30

Cost per mile driven = 18 cent

Daily budget = $75

Greatest distance you can drive each day while staying within budget :

Rental cost + (cost per mile driven * distance) ≤ daily budget

$30 + 18d ≤ $75

18d ≤ 75 - 30

18d ≤ 45

d ≤ 45 / 18

d ≤ 2.5

Greatest distance you can drive each day while staying within budget is 2.5 miles.

Answer: 1.8 L/h

Step-by-step explanation:

To convert the rate of water dripping from a tap from millilitres per second (ml/sec) to litres per hour (L/h), we need to use conversion factors.

Step 1:

First, let's convert the rate from millilitres per second to litres per second.

There are 1000 millilitres in a litre, so we can divide the rate in millilitres per second by 1000 to get the rate in litres per second:

\(\LARGE \boxed{\textsf{0.5 ml/sec $\div$ 1000 = 0.0005 L/sec}}\)

Step 2:

We can convert the rate from litres per second to litres per hour. There are 3600 seconds in an hour, so we can multiply the rate in litres per second by 3600 to get the rate in litres per hour:

\(\LARGE \boxed{\textsf{0.0005 L/sec $\times$ 3600 = 1.8 L/h}}\)

Therefore, the rate of water dripping from the tap is 1.8 L/h.

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After constructing a circle, the next step in constructing an inscribed square by hand is to draw the diagonals of the circle.

When constructing an inscribed square, drawing the diagonals of the circle is the next step because the diagonals of a square are also the diameters of the circle. By drawing the diagonals, we can find the points where the diagonals intersect the circle, which will be the vertices of the square. This ensures that the square is inscribed within the circle, with its corners touching the circumference of the circle.

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Answer: (A) Set compass to the diameter of the circle.

Step-by-step explanation: got it right in the test

Answer:

https://mmpa.org/wp-content/uploads/2015/09/Tip-Speed-Ratio-Provided-by-Kid-Wind-PDF.pdf

check this out - - it might help!

Step-by-step explanation:

We were told that Amber had 5/6 of a book of postage stamps. If she used 2/6 of the book of postage stamp, then the fraction of the book of postage stamp that she has left is

5/6 - 2/6

= 3/6

She has 3/6 now

Given the following data:

Points on x-axis = (-3, 9).

Points on y-axis = (6, -10).

The slope of a line simply refers to the gradient of a line and it's typically used to describe both the ratio, direction and steepness of an equation of a straight line.

Mathematically, the slope of a straight line can be calculated by using this formula;

\(Slope, m = \frac{Change\;in\;y\;axis}{Change\;in\;x\;axis}\\\\Slope, m = \frac{y_2\;-\;y_1}{x_2\;-\;x_1}\)

Substituting the given parameters into the formula, we have;

Slope, m = (-10 - 6)/(9 - (-3))

Slope, m = -16/12

Slope, m = -4/3.

Mathematically, the standard form of the equation of a straight line is given by;

y - y₁ = m(x - x₁)

y - 6 = -4/3(x - (-3))

3y - 18 = -4x - 12

3y = -4x - 12 + 18

3y = -4x + 6

y = -4x/3 + 2.

First of all, we would determine the midpoint of line AB as follows:

Midpoint on x-coordinate is given by:

Midpoint = (x₁ + x₂)/2

Midpoint = (-3 + 9)/2

Midpoint = 6/2

Midpoint = 3.

Midpoint on y-coordinate is given by:

Midpoint = (y₁ + y₂)/2

Midpoint = (6 - 10)/2

Midpoint = -4/2

Midpoint = -2.

For perpendicularity, we have:

m₁ × m₂ = -1

-4/3 × m₂ = -1

m₂ = 3/4.

Next, we would use the point-slope form to write the equation:

y - y₁ = m₂(x - x₁)

y - (-2) = 3/4(x - 3)

y + 2 = 3/4(x - 3)

4y + 8 = 3x - 9

3x - 4y = 8 + 9

3x - 4y = 17 (Proved).

Mathematically, the standard form of the equation of a circle is given by;

(x - h)² + (y - k)² = r²

(x - 15)² + (y - 7)² = 325

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Complete Question:

A is the point (-3, 6) and B is the point (9, -10).

a) Find the equation of the line through A and B.

b) Show that the perpendicular bisector of the line AB is 3x-4y=17.

c) A circle passes through A and B and has its center on line x=15. Find the equation of this circle.

Answer:

Z

Step-by-step explanation:

the answer is z! x should increase by 2 every time y increases by 1

Answer:

Z.

Step-by-step explanation:

Vinegar (on the left)

Cleaner (On Bottom)

X is horizontal line

Y is vertical line.

To solve, just use what is given, lawson uses 1 cup of vinegar (up 1) for 2 cups of cleaner (run (move 2 to the right) 2)

Rise over run.

Answer:

27 I think just divide 81 by 3

The acceptable limits of the control are 13.7 mg/dL and 14.3 mg/dL for mean for the normal hemoglobin control is 14.0 mg/dL. The standard deviation is 0.15 with an acceptable control range of /- 2 standard deviations (SD).

Given that the mean for the normal hemoglobin control is 14.0 mg/dL.

The standard deviation is 0.15 with an acceptable control range of /- 2 standard deviations (SD).

To determine the acceptable limits of the control, we can use the following formula:

Lower limit = Mean - 2 × SD

Upper limit = Mean + 2 × SD

Substituting the given values in the formula,

Lower limit = 14.0 - 2 × 0.15 = 13.7 mg/dL

Upper limit = 14.0 + 2 × 0.15 = 14.3 mg/dL

Therefore, the acceptable limits of the control are 13.7 mg/dL and 14.3 mg/dLfor mean for the normal hemoglobin control is 14.0 mg/dL. The standard deviation is 0.15 with an acceptable control range of /- 2 standard deviations (SD).

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Answer:

Cuando tenga problemas con una pregunta, venga aquí y también lo ayudaremos si no recibe la pregunta, intente omitirla.

Step-by-step explanation:

To estimate the frequency spectrum of the signal {1, 9, 0, 1, 4, 9} using the FFT, we apply the FFT algorithm to the signal. The FFT decomposes the signal into its constituent frequencies and provides the corresponding magnitude and phase responses.

(a) By applying the FFT to the given signal, we obtain the frequency spectrum. The magnitude spectrum represents the amplitudes of different frequency components in the signal, while the phase spectrum represents the phase shifts of those components.

(b) To plot the magnitude and phase response of the calculated spectrum, we would need to compute the magnitude and phase values for each frequency component obtained from the FFT.

The magnitude values can be plotted on a graph as a function of frequency, representing the strength of each frequency component. Similarly, the phase values can be plotted as a function of frequency, showing the phase shifts at different frequencies.

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The roots have positive or same signs when c>0.

Note that only real numbers can be positive or negative. This concept does not apply to complex non real numbers. So first we have to make sure that the roots are real which occurs when discriminant is greater or equal to 0.

\(b^{2} -2ac > 0\\2^{2} -2(-1) (c) > 0\\4-2c > 0\\c > -2\)

Roots of quadrant equation have Samsame sign if product of roots >0.

\(\frac{a}{c} > 0\\\frac{c}{-1} > 0\\c < 0\)

Roots of quadratic equation have positive sign if product of roots<0.

c>0.

Combining results, we get:-

roots have positive signs when:-

c>0.

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Answer: x = 7

Step-by-step explanation: 6x = x^2 - 7

x^2 - 6x -7 =0

(x-7) (x+1) = 0

x = 7  

x = -1 ----> rejected

The positive solution of the required number is 7.

An expression is a grouping of one or more mathematical or logical operators, operands (values, variables, or other expressions), and brackets in mathematics and computer programming that denote a computation that can be evaluated to generate a value.

Let's start by translating the given sentence into an equation. Let "x" be the number we are trying to find. Then we can write:

6x = x² - 7

Now we need to solve for x. Let's rearrange the equation to get all the x terms on one side and all the constant terms on the other side:

x² - 6x - 7 = 0

We can solve this quadratic equation by factoring or using the quadratic formula, but let's use factoring for this problem. We need to find two numbers whose product is -7 and whose sum is -6. The two numbers are -7 and 1, so we can write:

(x - 7)(x + 1) = 0

This means that either x - 7 = 0 or x + 1 = 0. Solving for x, we get:

x = 7 or x = -1

Since we are looking for a positive solution, the answer is x = 7. Therefore, the positive solution is 7.

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Answer:

A) |−6| > −6

Step-by-step explanation:

Absolute value means take the non negative number

A) |−6| > −6 = 6> -6 true  

B) |12| < |−5| 12 < 5 false

C) |−8| < 8 8 < 8 false

D) 7 > |−10|  7 > 10 false

The shaded portion of CUA'UB'  is given in the attached figure.

A set is a collection of well defined objects

The given sets are A , B , C and the universal set U.

A Venn diagram uses overlapping circles or other shapes to illustrate the logical relationships between two or more sets of items

Now we need to share the portion of CU(AnB)'

(AnB)'=A'UB' from the propertys

CUA'UB'

A'=U-A

B'=U-B

So the shaded portion of CUA'UB'  is given in the attached figure.

Hence, the shaded portion of CUA'UB'  is given in the attached figure.

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The frequency with the largest amplitude is `w ≈ 2.303` (rtol=0.01, atol=1e-08).

The question asks us to find the frequency w for which the particular solution to the differential equation \(dạy dy 2- + dt2 + 2y = eiwt dt\)has the largest amplitude.

We can assume a positive frequency w > 0.

Let's find out how to solve this problem:

We need to find the particular solution in the form Aeiwt, and then minimize the modulus of the denominator of A over all frequencies w. It means the denominator of A will have a maximum amplitude if we minimize the modulus. The amplitude of the solution is given by the value of |A|.

Let us assume the particular solution to be `\(y = Aeiwt`.\)

Substitute the above solution in the given differential equation.

Then, we get:\(`d^2(A e^(iwt))/dt^2 + 2(A e^(iwt)) = e^(iwt)`\)Applying the differential operator on the above equation,

we get: \(`(iwt)^2 A e^(iwt) + 2A e^(iwt) = e^(iwt)`Therefore, `A = 1 / (1 - (w^2) + 2i)`.\)

Thus, the amplitude of the particular solution is:

\(`|A| = 1 / sqrt((1 - w^2)^2 + 4w^2)`\)

Now, we need to minimize the above expression to get the frequency w at which the amplitude of the particular solution is maximum. This can be done by minimizing the modulus of the denominator of A over all frequencies w.To minimize the above expression, we take the derivative of the expression with respect to w and equate it to zero, which gives us: \(`(8w^2) / ((w^2 - 1)^2 + 4w^2)^(3/2) - (2(w^2 - 1)) / ((w^2 - 1)^2 + 4w^2)^(3/2) = 0`\)

Simplifying the above expression, we get: `

\(2w^2 = w^4 - 3w^2 + 1`\)

Therefore, \(`w^4 - 5w^2 + 1 = 0`.\)

Solving the above equation gives us:

`\(w^2 = (5 ± sqrt(21)) / 2`\).Since we know that w > 0, we choose the positive value of w.

Thus, the value of w is: \(`w = sqrt((5 + sqrt(21)) / 2)` or `w ≈ 2.303\)`.

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Answer: Leftmost vertex

Step-by-step explanation:

Point L is the midpoint

The midpoint is halfway between the two points. In this case, Point F and Point B are 10 units away from each other. The midpoint is the distance between the points (10) divided by 2.

y>/-4x+20

This is the answer :D

Sasha should use 2 desired outcomes in her probability calculation to determine that she has a 1/3 chance of winning the game.

To calculate Sasha's probability of winning, we need to determine how many desired outcomes she has. In this game, Sasha needs to spin a number higher than both of her friends' spins, which means she needs to spin a number greater than 1 and 4.

Let's analyze the spinner pictured. From the image, we can see that the spinner has numbers ranging from 1 to 6. Since Sasha needs to spin a number higher than 4, she has two options: 5 or 6.

Now, let's consider the desired outcomes. Sasha has two desired outcomes, which are spinning a 5 or spinning a 6. If she spins either of these numbers, she will have a number higher than both of her friends and win the game.

To calculate Sasha's probability of winning, we need to divide the number of desired outcomes by the total number of possible outcomes. In this case, the total number of possible outcomes is the number of sections on the spinner, which is 6.

Sasha's probability of winning is 2 desired outcomes divided by 6 total outcomes, which simplifies to 1/3.

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.

Answer: All four answer choices would create congruent shapes.

===================================================

Explanation:

Reflections, rotations, and translations are considered rigid transformations. What this means is that they keep the same shape, but the shape has been moved in some fashion. As such, the "before" (preimage) and "after" (image) are congruent figures.

Imagine you drew a triangle on a clear piece of glass. If you took a picture of it from one side, then took another picture from the opposite side, then you'd get reflected versions of the triangle. Notice how the triangle has not moved at all. The camera has. Therefore, this proves that reflections keep the same exact shape. The only thing different is the orientation has swapped.

Now imagine you drew a triangle etched in stone. Grab your camera to take a picture of it. Then rotate the camera to get another picture. The two triangles are rotated copies of each other. They're the same exact triangle since the figure etched in stone hasn't changed. Only the camera has. This thought exercise proves rotations are a rigid transformation, aka an isometry.

Lastly, we'll go back to the triangle etched in stone to work with translations. A translation is any shifting. Take a picture of the triangle etched in stone. Then move the camera around to pan to another location (panning is when you keep your aim at the subject but move side to side, or up and down). Imagine the camera is stuck on a train track and can only aim one direction. The camera will take two pictures of the same triangle, of course the only difference is that they have shifted in the frame. Therefore, translations are the third final type of rigid transformation.

-----------------

Dilations are not rigid transformations, but only if the scale factor was something else than 1.

If the scale factor is less than 1, then the image shrinks.

If the scale factor is greater than 1, then the image enlarges.

If the scale factor is exactly 1, then the image doesn't change at all. This is because we multiplied all sides by 1. Multiplying by 1 doesn't change the number.

So because choice (2) mentions the scale factor is 1, this places it in the "rigid transformation" category and it's one of the four answers. Change the scale factor to anything else, and it wouldn't be an answer.

Tim could fill the 18-litre bucket in 22.5 times.

To get the number of times he could fill an 18-litre bucket with the sand from the wheelbarrow, we wil set up proportion using the known information.

The amount of sand that can fill a 12-litre bucket is proportional to the number of times it can fill the bucket.

The proportion will be:

12 litres / 15 times = 18 litres / x times

12x = 15 * 18

12x = 270

x = 270 / 12

x = 22.5.

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