Evaluate the expression????? -|x-y| for x=-2 and y=-5

This study was conducted to explore whether the perception of money by preschool-age children is influenced by their family wealth.

This was investigated by testing how the children would recall the size of a coin, with the assumption that the size recalled related to the value placed on the coin. To conduct the study, three local daycare facilities specializing in preschool-age children were randomly selected.

Consent forms were sent home to the parents of the kids, which also asked parents for their average yearly household income. Since everyone from the three selected facilities was used in the study, this is a census sampling.

The income data collected was quantitative data at the ratio level of measurement. From the parents who consented, the children were divided into two groups:

those whose family income was greater than $40,000, and those whose family income was less than $40,000. Each child was asked to draw a nickel.

The resulting circle's diameter was then measured. When the shape drawn was not a perfect circle, the largest and smallest diameters were averaged. The coin diameter data were continuous data at the interval level of measurement. The gender of each child was also collected.

This data was categorical data at the nominal level of measurement. Because this data was collected at one point in time, this is a cross-sectional study. Since we are not imposing treatment on the children, this is not an experiment.

It is hypothesized that children from lower-income families would draw larger coins than children from higher-income families.

This study used census sampling to investigate the relationship between family wealth and the perception of money in preschool-age children.

Data on average yearly household income, coin diameter, and gender were collected. The income data was quantitative at the ratio level of measurement, while the coin diameter data was continuous at the interval level of measurement, and the gender data was categorical at the nominal level of measurement.

This study is a cross-sectional study, and it hypothesized that children from lower-income families would draw larger coins than children from higher-income families.

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Answer:

13.7

Step-by-step explanation:

7*k²=9

k²=9/7

k=√9/7

k=1.133893419

20/1.133893419³=13.7

The volume of toy A will be equal to 13.7 cubic centimetres.

An ordered pair of numbers a and b, represented as a / b, is a ratio if b is not equal to 0. A proportion is an equation that sets two ratios at the same value.

The numerical relationship between two values demonstrates how frequently one value contains or is contained within another.

Given that the ratio surface area of toy A: to the surface area of toy B is 7:9. The volume of toy B is 20 cm

The computation of the volume of toy A is shown below:

7 × k²=9

k²= 9 ÷ 7

k=√(9 ÷ 7)

k = 1.133893419

Now

The volume of toy A = 20 ÷ 1.133893419³

The volume of toy A = 13.7 cubic centimetres

Therefore, the volume of toy A will be equal to 13.7 cubic centimetres.

The missing figure is attached with the answer below.

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Answer:

27.88 ounces

Step-by-step explanation:

6.8 x 4.1 = 27.88 ounces

The length, breadth and height will be 78 cm, 78cm, 78cm each.

let consider the length = l

breadth = b

height = h

we are provided that

l + b + h = 234cm .......(1)

Also we have to maximize the volume , provided length is equal to breadth

∴ eqn (1) becomes

2b + h = 234

h = 234 - 2b

also ,

volume(v) = lbh

v = b²(234 - 2b)

v = b²234 - 2b³

now to maximize the volume we take the first derivative of the volume wrt 'b' and place it equal to zero. ( lagrange method )

i.e. d( v)/db = 0

∴  468b - 6b² = 0

 6b² - 468b = 0

6b( b - 78 ) = 0

∴  b = 78 cm

now as length = breadth

l = b = 78 cm

also putting this value in eqn (1)

h = 234 - 2b

h =  78 cm

So , the dimensions will be equal and will be 78cm , 78cm, 78cm each .

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The offered statement states that a rectangle's basic shape has a 45-square-foot area.

An example of a quadrilateral with equal and parallel opposite sides is a rectangle. It is a polygon with four sides and four angles that are each 90 degrees. A parallelogram is a polygon with only two dimensions. To be a square, a rectangle's sides must all have the same length, hence not all rectangles are squares.

Area of rectangle = Length (L) * Width (W)

Area of rectangle = \(\sqrt{15*9*5*3}\)

= \(\sqrt{3*5*3*3*5*3}\)

= 3*5*3

= 45

Consequently, the area of a rectangle in its most basic form is 45.

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Regarding to angle x, we have the opposite leg and the hypothenuse. The trigonometric function that associates them is the sine.

So:

Answer: x= 32.6850 degrees

Answer: 24.9

Step-by-step explanation:

Answer:

k = 2P  /x^2

Step-by-step explanation:

P = 1/2 kx^2

Multiply each side by 2

2P = 2*1/2 k x^2

2P = k x^2

Divide each side by x^2

2P / x^2 = k x^2 / x^2

2P /x^2 =k

Answer:

a for saturn is 9.55 astronomical units

Step-by-step explanation:

Here, we are interested in calculating the distance from the sun.

Mathematically, from the question;

P = a^3/2

29.5 = a^3/2

a = 29.5^2/3

a = [3√(29.5)]^2

a = 9.55 in astronomical units

Answer:

a) 9.5 AU

Step-by-step explanation:

on edge

Answer:

The result can be shown in multiple forms.

Exact Form:

p= - 13/19

Decimal form:

p= - 0.68421052...

(i) The expression for the profit is -p² + 14p - 33

(ii) The price per muffin that maximizes profit is $7.

(i) The expression for profit in terms of p can be calculated by subtracting the cost from the revenue. The revenue is obtained by multiplying the price per muffin (p) by the number of muffins sold (q):

Revenue = p * q

The cost per muffin is given as $3. Therefore, the profit (P) can be expressed as:

P = Revenue - Cost

P = (p * q) - (3 * q)

Since q = 11 - p, we can substitute this expression into the profit equation:

P = (p * (11 - p)) - (3 * (11 - p))

Simplifying further, we have:

P = 11p - p² - 33 + 3p

P = -p² + 14p - 33

(ii) To find the price that maximizes profit, we need to determine the value of p that corresponds to the maximum point of the profit function. In this case, the profit function is a quadratic equation.

To find the maximum point, we can calculate the vertex of the quadratic function using the formula:

p = -b / (2a)

In the quadratic equation P = -p² + 14p - 33, we can identify that a = -1, b = 14, and c = -33.

Using the vertex formula, we can find:

p = -14 / (2*(-1))

p = 7

Therefore, the price per muffin that maximizes profit is $7.

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The value of the yakubu and bello business is N80,000.

Let's start by determining the original value of Yakubu and Bello's shares in the business before the sale took place.

The ratio of their shares is given as 3:5, which means Yakubu owns 3 parts and Bello owns 5 parts out of a total of 3+5 = 8 parts.

Now, let's assume the value of the business is represented by "V" (to be determined).

Since Yakubu later sold 3/4 of his share to Bello, this means he sold 3/4 * 3 = 9/4 parts of the business to Bello.

The value of 9/4 parts of the business is N180,000, so we can set up the following equation:

(9/4) * V = N180,000

To solve for V, we multiply both sides of the equation by 4/9:

V = (4/9) * N180,000

V = N80,000

Therefore, the value of the business is N80,000.

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Answer:

7

Step-by-step explanation:

Answer:

7

Step-by-step explanation:

3×5-1-(2^2+6÷2)

3×5-1-(4+6÷2)

3×5-1-(4+3)

3×5-1-7

15-1-7

14-7

7

Answer:

is there more in the question

To find the LSQ quadratic polynomial for the given data set, we need to start with creating the design matrix and observation vector. The design matrix X is constructed using the x values of the data set and is given by:
X = [1 -2 4; 1 0 0; 1 -2 4; 1 1 1]

Here, each row corresponds to one data point, with the first column representing the constant term, the second column representing the linear term, and the third column representing the quadratic term.
The observation vector y is constructed using the corresponding y values of the data set and is given by:
y = [1; 1; 1; 3]
Now, to find the LSQ quadratic polynomial, we need to solve the linear system X'Xp = X'y, where p is the parameter vector containing the coefficients of the quadratic polynomial.
Solving this system, we get:
p = [-11/4; 1/2; 9/4]
Therefore, the best fit quadratic polynomial for the given data set is:
y(x) = 20 - 11/4x + 1/2x^2 + 9/4x^2
Note that the constant term 20 is not obtained from the linear system and is instead taken directly from the polynomial form.

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Answer:

Step-by-step explanation:

The Great Depression and the memories of the catastrophic losses in World War I combined in the 1930s to push American public opinion and policy in the direction of isolationism. Isolationists favored staying out of international affairs and staying out of conflicts in Europe and Asia.

The devastation and expense of World War One had left their imprint on America, and the majority of people there just wanted to be left alone to focus on fostering prosperity in their country rather than be involved in any further politics in Europe.

Because they did not want the US to be drawn into another conflict the way they (perceived) it had been into World War I, many Americans in the 1930s backed an isolationist stance.

Because when he first became office, he felt at ease reaching out to the globe in a variety of ways. However, after realizing that his neighbors did not get along, he decided it would not be best for the US to become involved.

Therefore,

The Great Depression and the memories of the catastrophic losses in World War I combined in the 1930s to push American public opinion and policy in the direction of isolationism. Isolationists favored staying out of international affairs and staying out of conflicts in Europe and Asia.

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The crank angle value when the piston is at Top Dead Center (TDC) is 0 radians or 0 degrees. The maximum ratio of the crank radius to the connected length is 0.3.

The crank angle value refers to the angle between the crankshaft and a reference point when measuring the position of the piston. When the piston is at Top Dead Center (TDC), it is at its highest point in the cylinder. The crankshaft is positioned such that the connecting rod is aligned with the crank radius and the piston is at the topmost position. This corresponds to a crank angle value of 0 radians or 0 degrees.

Regarding the maximum ratio of the crank radius to the connected length, this value is given as 0.3. The crank radius is the distance from the center of the crankshaft to the center of the crank pin, and the connected length is the distance from the center of the crank pin to the center of the piston pin. The maximum ratio of 0.3 indicates that the crank radius is 0.3 times the connected length.

It's important to note that these values are specific to the context of the problem statement provided. Different engines or mechanisms may have different values for the crank angle at TDC and the maximum ratio of crank radius to connected length.

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The researcher is assessing item equivalence, If a study is in parallel forms of the measurement instrument to the same person. The correct option is C).

When a study introduces parallel forms, the researcher is assessing item equivalence. Item equivalence refers to the extent to which the different forms of the measurement instrument produce similar results for the same individual.

This assessment is crucial in research because it allows researchers to evaluate the consistency and reliability of the measurement instrument across different versions. By administering parallel forms to the same person, any differences in responses can be attributed to individual factors rather than variations in the instrument.

This helps ensure that the instrument is measuring the intended construct consistently and accurately. The correct option is C).

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The correct description is that moon is waxing.

The theory used in this question is the lunar cycle, which is the process by which the moon changes its shape and illumination over the course of a month.

The waxing phase of the lunar cycle is when the moon is gradually getting bigger and more illuminated.

The waning phase is when the moon is gradually getting smaller and less illuminated.

The moon is waxing:

This is an accurate description because when the moon changes from a new moon to a full moon, it is said to be waxing.

This means that the moon is gradually getting bigger, and its illuminated side is increasing.

This process is called the waxing phase of the moon's cycle.

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Answer:

-72

Step-by-step explanation: 9x-1= -9 and 8x+8= 8 and then parenthesis around both equations, which mean multiply, so -9 x 8= -72 .

The evaluated expression is 9x^13y√x

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

\(x\2sqrt{x}9xx^{7}yx^{5}\)

Express properly

So, we have

x√x * 9x^7 * yx^5

Evaluate the products by applying the law of indices

So, we have the following representation

√x * 9* yx^13

This can be rewritten as

9x^13y√x

Hence, the solution is 9x^13y√x

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The type of r.v.R is a continuous random variable, since its possible values form a continuous interval [0,1].

The sample space of R is the interval [0,1], since the distance from the origin to any point inside the unit circle is between 0 and 1.
To find P(R < r), we need to find the probability that the randomly selected point falls inside a circle of radius r centered at the origin. The area of this circle is πr^2, and the area of the entire unit circle is π, so the probability is P(R < r) = πr^2/π = r^2.
The cdf of R is the function F(r) = P(R ≤ r) = ∫0r 2πx dx / π = r^2, where the integral is taken over the interval [0,r]. This is because the probability that R is less than or equal to r is the same as the probability that the randomly selected point falls inside the circle of radius r centered at the origin, which has area πr^2. The cdf of R is a continuous and increasing function on the interval [0,1].

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The five values in a summary are the median, the lower and upper quartiles, the maximum and minimum values in the data set. Minimum value, lower quartile (Q1), median value (Q2), upper quartile (Q3), and maximum value are all listed together in this sequence.

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Answer:

5 dozen Donuts

7 dozen bagels

Step-by-step explanation:

5 * 9 = 45

7 * 8 = 56

56 + 45 = 101

Answer: He bought 5 dozen donuts

Step-by-step explanation:

d + b = 12   where d is the number of donuts and b is the number of bagels.

9d + 8b= 101  now solve the two equations using the elimination method

-9d - 9b =-108

9d  + 8b = 101

        -1b = -7

  b = 7

9d + 8(7)= 101

9d + 57 = 101

9d = 45

d= 5

On solving the provided question, by properties of parallel lines we got to know that -  1 - A  2 - C  3 - B  4 - D

When two or more lines cross the intersection line, alternate exterior angles result. These angles are created on a number of sides outside the transverse lines. Any two parallel lines that cross one another create two angles with the horizontal line. In the area between the parallel lines, interior angles are formed, while alternate exterior angles are formed in the area outside the parallel lines.

Matches are -

1 - A

2 - C

3 - B

4 - D

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Answer:

1/2

Step-by-step explanation: