Data was collected on the amount of time that a random sample of 8 students spent studying for a test and the grades they earned on the test. A scatter plot and kind of fit were created for the data.


Determine the equation of the line of fit

y= 15x + 70
y= 15x + 40
y= 30x + 70
y= 30x + 40

[tex](2x-1)^{2} = 25 \iff (2x-1)^{2} = 5^{2}\\[/tex]

[tex]x > 0 \implies 2x - 1 = 5 \iff 2x = 5 + 1 \iff 2x = 6 \implies \bf x = 3\\[/tex]

[tex](3y-1)^{2} = 36 \iff (3y-1)^{2} = 6^{2}\\[/tex]

[tex]y > 0 \implies 3y-1 = 6 \iff 3y = 6 + 1 \iff 3y = 7 \implies \bf y = \dfrac{7}{3}\\[/tex]

⇒

[tex]\dfrac{3x - y}{x+y} \cdot \dfrac{1}{7} = \dfrac{3(3) - \frac{7}{3} }{7(3+\frac{7}{3} )} = \dfrac{9 - \frac{7}{3} }{7(\frac{16}{3})} = \dfrac{\frac{27-7}{3} }{7(\frac{16}{3})}=\\[/tex]

[tex]= \dfrac{\frac{20}{3} }{\frac{112}{3}} = \dfrac{20}{3} : \dfrac{112}{3} = \dfrac{20}{3} \cdot \dfrac{3}{112} = \dfrac{20}{112} = \bf \dfrac{5}{28}\\[/tex]

According to the preceding statement, then standard deviation becomes 4.19 if the sample variance is given as 17.56.

A measurement of a data set's departure from the mean is referred to as "standard deviation" (or ""). Whereas a large variance shows that the numbers are more spread, a lower number suggests that its data are clustered around the mean. The standard deviation is a measure of how volatile your collected data is generally. It displays the standard deviation for every score with respect to the mean.

We must consider the square root of both the sample covariance matrix to determine the standard deviation.

= √17.56

≈ 4.19

Hence, their standard deviation is around 4.19

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First, we need to find the number of people who went to the pool in the second, third, and fourth weeks.

Number of people in second week = 1,120 - 125 = 995

Number of people in third week = 995 + 145 = 1,140

Number of people in fourth week = 1,140 - 132 = 1,008

To find the percent decrease, we need to find the difference between the number of people in the first week and the fourth week, and then divide by the number of people in the first week.

Difference between first and fourth weeks = 1,120 - 1,008 = 112

Percent decrease = (112/1,120) x 100% = 10%

Therefore, the percent decrease in the number of people who went to the pool over these four weeks is 10%.

Mr Smith looks their children 1 times 1

The total amount the mechanic will need in retirement savings to meet their retirement income goa is (B) $950,000, the correct option is B

Simple interest is a method of calculating the interest charge. Simple interest can be calculated as the product of principal amount, rate and time period.

Simple Interest = (Principal × Rate × Time) / 100

We are given that;

Annual gross wage=  $47,500

Percentage saved= 80%

Draw in 1 year=4%

Now,

To calculate the total amount the mechanic will need in retirement savings to meet their retirement income goal, we can follow these steps:

Determine the retirement income goal: The mechanic wants to live off 80% of their current annual gross wage, which is:

0.8 x $47,500 = $38,000 per year

Calculate the amount of savings needed to generate the retirement income: The mechanic wants to draw 4% of their savings in the first year, so the amount of savings needed to generate $38,000 per year is:

$38,000 / 0.04 = $950,000

Therefore, by the given interest rate answer will be $950,000.

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Answer:

(-5, 2)

Step-by-step explanation:

We can see that the g(x) is a translated form of f(x) using the formula:

y = (x - h)³ + k,

where (h, k) is the origin of the graph's translation.

We can assign the following h and k values based on the given g(x):

g(x) = (x + 5)³ + 2

h = -5

k = 2

Finally, we can form an ordered pair (h, k):

(-5, 2)

One key difference between the two graphs is that [tex]$y=x^2$[/tex] is a function, meaning that for each x value there is only one y value. On the other hand,[tex]$x=y^2$[/tex]is not a function.

The graph of[tex]$y=x^2$[/tex] is a parabola that opens upwards, centered at the origin (0,0). The graph of [tex]$x=y^2$[/tex] is also a parabola, but it opens to the right, also centered at (0,0). Both graphs intersect at the origin, where x=y=0.

Another important similarity between the two graphs is that they are both symmetric with respect to the y=x line,

which is the line of symmetry for both graphs. This means that if we reflect one of the graphs across the line y=x, we get the other graph.

One key difference between the two graphs is that [tex]$y=x^2$[/tex] is a function, meaning that for each x value there is only one y value.

On the other hand,[tex]$x=y^2$[/tex]is not a function, because for some y values there are two corresponding x values (one positive and one negative). This means that the graph of [tex]$x=y^2$[/tex] fails the vertical line test.

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In square prism , A cracker box in the shape of a square prism with a base side length of   [tex]SA - \frac{2S^{2} }{4S} = h[/tex].

What is square prism?

The bases of a square prism are square, and the other four faces are rectangles. A square prism is a cuboid object in three dimensions.

                                    Angles and sides that are in opposition to one another are congruent. A magnet bar is an illustration of the shape of a square prism.

we know that'

The formula to calculate the surface area of a square prism is

          [tex]Q = 2s^{2} + 4sh[/tex]

  subtract 2s² both sides

    SA - 2s² = 4sh

  Divide by 4s both sides

     [tex]SA - \frac{2S^{2} }{4S} = h[/tex]

   Rewrite

   [tex]SA - \frac{2S^{2} }{4S} = h[/tex]

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The image triangle has vertices after the dilation by a scale factor of 3 are M'(0,12), N'(12,6), and P'(6,-6).

To find the image coordinates of a triangle after dilation, we need to multiply the coordinates of each point by the scale factor.

In this case, the scale factor is 3.

So the image coordinates of the triangle with vertices M(0,4), N(4,2), and P(2,-2) after dilation by a scale factor of 3 are:

M' = (3 * 0, 3 * 4) = (0, 12)

N' = (3 * 4, 3 * 2) = (12, 6)

P' = (3 * 2, 3 * (-2)) = (6, -6)

Hence, the image triangle has vertices M'(0,12), N'(12,6), and P'(6,-6).

In summary, the image coordinates of the triangle after dilation by a scale factor of 3 are M'(0,12), N'(12,6), and P'(6,-6).

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The distance between points A and B is 6 units.

The shortest distance (length of the straight line segment's length connecting both given points) between points ( p,q) and (x,y) is:

[tex]D = √[(x-p)² + (y-q)²] D = \sqrt{(x-p)^2 + (y-q)^2} \: \rm units.[/tex]

We are given that;

The points= (-1.4) and B (5.-2)

Now,

To find the distance between points A (-1.4) and B (5.-2), we can use the distance formula:

d = [tex]\sqrt((x2 - x1)^2 + (y2 - y1)^2)[/tex]

where (x1, y1) and (x2, y2) are the coordinates of points A and B, respectively.

Substituting the values we have:

[tex]\sqrt{(5 - (-1))^2 + (-2 - (-4))^2}[/tex]

d = [tex]\sqrt{(5 + 1)^2 + (-2 + 2)^2}[/tex])

d = [tex]\sqrt{(6^2 + 0^2)}[/tex]

d = [tex]\sqrt{36}[/tex]

d = 6

Therefore, by the distance formula answer will be 6 units.

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The centroid of the region is at the point (0, 2/5).

To find the centroid of the region bounded by the curves y=2-x² and y=x, we first need to find the limits of integration and the expressions for the x-coordinate and y-coordinate of the centroid.

The curves intersect at (1,1) and (-1,1), so we will integrate over the interval [-1,1].

To find the x-coordinate of the centroid, we need to evaluate the following integral:

x' = (1/A) ∫[a,b] xf(x) dx

where;

A = ∫[a,b] (f(x) - g(x)) dx

In this case, f(x) = 2 - x² and g(x) = x, so

A = ∫[-1,1] (2 - x² - x) dx

= [2x - (1/3)x³ - (1/2)x²] | from -1 to 1

= (4/3)

Now we can evaluate the x-coordinate of the centroid:

x' = (1/A)∫[-1,1] x*(2-x²-x) dx

= (1/(4/3))∫[-1,1] (2x - x³ - x²) dx

= (3/4) [(x²/2) - (1/4)x⁴ - (1/3)x³] | from -1 to 1

= 0

So the x-coordinate of the centroid is 0.

To find the y-coordinate of the centroid, we need to evaluate the following integral:

y' = (1/A) ∫[a,b] (1/2) [f(x)² - g(x)²] dx

y' = (1/(4/3)) ∫[-1,1] (1/2)[(2-x²)² - x²] dx

= (3/4)[(8/15)x⁵ - (2/3)x³ + (1/2)x] | from -1 to 1

= (2/5)

So the y-coordinate of the centroid is 2/5.

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The values in the table using the expression (time=2 × no. of pages) will be 0.5, 5 and 8.5.

In mathematics, an expression is a combination of numbers, variables, and operations that can be evaluated to produce a value.

Expressions can be simple or complex, and can involve arithmetic, algebraic, or logical operations. Some examples of expressions include:

In each of these examples, the expression consists of one or more terms that are combined using operations such as addition, subtraction, multiplication, division, or exponentiation.

Now,

As given pages = 8 and time= 16 minutes

this can be deduced by expression Time=2 × no. of pages

Then for time= 1,10 and 17 minutes

no. of pages will be 1/2,10/2 and 17/2.

Hence, the table will be:

Pages           8       0.5         5        8.5

Minutes      16        1           10       17

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Answer:

Quadratic since it times by 4 every time

Step-by-step explanation:

The geometric probability of the cube is 0.64

The complete question is added as an attachment

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

Next, we calculate the volumes of the cube and the cylinder using the following formulas

V(Cube) = l³

V(Cylinder) = πr²h

So, we have

V(Cube) = 3.2³ = 32.768

V(Cylinder) = 3.14 * (4.5/2)² * 3.2 = 50.868

The geometric probability of the cube is then calculated as

P = V(Cube)/V(Cylinder)

So, we have

P = 32.768/50.868

Evaluate

P = 0.64

Hence, the probability is 0.64

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√49 is a rational number. √50 is an irrational number. √127 is an irrational number. 125 is a rational number because it is equal to a perfect cube of the whole number 5.

A real number is considered to be irrational if it cannot be written as a simple fraction. It cannot be described using a ratio. When p and q are numbers and q is not identical to 0, N is not equivalent to p/q if N is irrational. An illustration of this is the illogic of the integers

A actual number that's unable to be written as the ratio between two integers—that is, as p/q, where both p and q both are integers—is an irrational number.

√49 is a rational number because it is equal to 7, which is a whole number.

√50 is an irrational number because it cannot be expressed as a fraction of two integers and it is not a perfect square.

√127 is also an irrational number because it cannot be expressed as a fraction of two integers and it is not a perfect square.

125 is a rational number because it can be expressed as 5^3, which is a perfect cube of the whole number 5.

Therefore, the correct statements are:

√49 is a rational number.

√50 is an irrational number.

√127 is an irrational number.

125 is a rational number because it is equal to a perfect cube of the whole number 5.

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The integer number that represents a temperature of 7 ºF below zero is given as follows:

-7 ºF.

Integer number are numbers that can have either positive or negative signal, but are whole numbers, meaning that they have no decimal part.

For temperatures, we have that:

Hence the integer number that represents a temperature of 7 ºF below zero is given as follows:

-7 ºF.

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Answer: Restaurant B

Step-by-step explanation:

First, Divide 14.52 by 11 as shown below to get the cost per burger for Restaurant A:

14.52/11 = 1.32

Next, divide 2.58 by 2 for the cost of the burger at Restaurant B:

2.58/2 = 1.28

Now we can see that Restaurant B's burgers are 4 cents cheaper than Restaurant A.

Good Luck!

Jaden's questions about the missing students influence the development of the plot in many ways.

Number is a mathematical object used to count, measure, and label. It is one of the most fundamental concepts in mathematics and is used in all areas of mathematics, including algebra, geometry, calculus, and statistics. Numbers are used to represent quantities and can be represented in a variety of ways, such as numerals, symbols, words, and graphs. Numbers can be used to measure and compare objects, define relationships between objects, and help solve problems.

Firstly, they cause the Puppetmaster to challenge her curiosity. The mysterious disappearances of the students compel the Puppetmaster to find out why they have gone missing, and to take measures to ensure that no one else goes missing. This encourages the Puppetmaster to become more involved in the game, and creates tension between her and the other players.

Secondly, Jaden's questions emphasize the close connection between the players and the Puppetmaster. The players rely on the Puppetmaster for guidance and safety, and her actions in response to Jaden's questions demonstrate her commitment to the players' wellbeing. This serves to strengthen the bond between the players and the Puppetmaster.

Thirdly, Jaden's questions persuade the teachers to begin a search for the missing students. By raising awareness of the situation, Jaden encourages the teachers to take action to investigate the disappearances and to protect the remaining students.

Finally, Jaden's questions highlight the entertainment value that the game provides each player. Her questions demonstrate her enthusiasm for the game, which encourages the other players to play with greater enthusiasm. This serves to increase the intensity of the game, and to make the game more exciting for all involved.

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The linear equation in this situation is y=20x which will have its solution as per the values of 'x'.

For instance, the cost of a good for a certain amount can be determined using a linear equation.

The linear equation in this situation is y=20x.

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The value of x is 54 when measure of arc MLis 76 Degrees and measure of Angle JLK is 54 Degrees.

A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre.

Measure of arc ML=76 Degrees and

Measure of Angle JLK = 54 Degrees

We have to find the value of x

O is the centre of the circle.

As we see the figure angle L is corresponding to 54 degrees.

x=54

Hence, the value of x is 54 when measure of arc MLis 76 Degrees and measure of Angle JLK is 54 Degrees.

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The factor that both trinomials have in common is; C: (x + 2)

In mathematics, a polynomial is defined an expression that consists of variables that are also referred to as indeterminates and coefficients, that involves only the operations of addition, subtraction, multiplication, and non-negative integer exponentiation of variables. An example of a polynomial of a single indeterminate x is x² - 7x - 18

The trinomial of james is;

x² - 7x - 18

Factorizing this gives;

x² + 2x - 9x - 18

= x(x + 2) - 9(x + 2)

= (x + 2)(x - 9)

The trinomial of Kaitlin is;

x² + 14x + 24

Factorizing this gives;

x² + 12x + 2x + 24

= x(x + 12) + 2(x + 12)

= (x + 2)(x + 12)

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Using inequalities, Y(x=0) = -2 and X(y=0) = -2 in region 1.

To pick area 1, draw a line at the intersection of (-2,0) and (0, -2), then choose the right side. such as.

Region 2) To pick the region to the left or upwards in region 2, we must draw a line from (0,2) to (-2,4).

Y(x=0) = 2\sX(y=-2) = -4

Region 3) To pick the region to the right, we must draw a line connecting (-4,0) and (0,4), as I'll demonstrate.

Inequalities in mathematics describe the relationship between two non-equal numbers. Equal does not necessarily mean unequal. When two values are not equal, we typically use the "not equal symbol ()". However, several inequalities are utilised to compare the numbers, whether it is less than or higher than.

The feasible area is now visible. Let's determine the vertices' coordinates.

Where the blue and green lines intersect is our first vertex.

3x + 2 = x + 4 and y = 3x + 2

3x - x = 4 - 2

y = 3× (1) + 2 = 3 + 2 = 5 when 2x = 2x = 1

(X, Y) = Vertex 1 (1,5)

The intersection of the red and green lines is at vertex #2:

y = -x -2; y = x + 4; y = x + 4 = -x - 2; and y = x + x = -2 - 4

2x = -6, x = -6/2, and y = (-3) + 4 = -3 + 4 = 1 are the results.

(X, Y) = Vertex 2 (-3,1)

The intersection of the red and blue lines is at vertex 3:

y = -x - 2, y = 3x + 2 -x - 2, and y = 2 + 2 -4 x = 4 x = -4 / 4 = -1.

So, y = 3× (-1) + 2 = -3 + 2 = -1

(X, Y) = Vertex 3 (-1, -1)

Let's now modify the graph by including the supplied equation.

The intercept where Y=0 is 0 is given by f(x,y) = -3x + 5y = 0 5y = 3x + 0 y = 3/5 × X + 0

the gradient m = 3/5

A line can be drawn from (0,0) to (-10, -6)

Let's now examine how it would appear in the area where it is practical.

We can see that the function intercepts the blue line or the line of the second section, which is where the largest value is located.

y = 3x + 2 3x + 2 (3/5 - 3) x = 2 -12/5 × x = 2 x = -5/6.

Hence, y = 3x + 2 3/5 × (-5/6) = -1/2.

The maximum is therefore found at (x,y) = (-5/6, -1/2).

The point where the function crosses the red line now marks the minimum.

y = 3/5 × x; y = -x -2

3/5 x = -x - 2\s (3/5 + 1) × x = -2\s8/5 x = - 2\sx = -2× (5/8) = -5/4.

y = 3/5 × (-5/4) = -3/4

The minimum is thus found at (x,y) = (-5/4, -3/4)

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The number of square units for the area of the square is greater than the number of units for the perimeter.

The area of a square is calculated using the formula below:

Area of square = (length of side)²

The length of the side of the square = 10 units

Ares of the square = 10 * 10

Area of the square = 100 units

The perimeter of a square = 4 * length of the side

Perimeter of a square = 4 * 10

The perimeter of a square = 40

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Complete question:

One side of a square is 10 units. Which is greater the number of square units for the area of the square or the number of units for the perimeter?

The least distance by Pythagorean theorem is equal to √5. (Correct choice: B)

In this problem we find the representation of a point and a line on Cartesian plane. There is a least distance between the point and the line when the line segment between them is perpendicular to the line. The line segment AC fulfill these features. Given the location of points A and C, we can determine the distance by means of Pythagorean theorem:

d = √[(Δx)² + (Δy)²]

Where:

If we know that A(x, y) = (1, 3) and C(x, y) = (3, 2), then the least distance between the point and the line:

d = √[(3 - 1)² + (2 - 3)²]

d = √[2² + (- 1)²]

d = √5

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16 + 5

Because Dan has 16 pencils and he gets 5 more

The proportionality constant (mm to cm) is 10 and the complete table is -

9 cm                 90 mm

12.5 cm             125 mm

50 cm               500 mm

88.49 cm          884.9 mm

A proportional relationship between two variables {x} and {y} means that if {x} increases, then {y} increases with it proportionally.

Given is a proportional relationship between two scales.

{ 1 } -

We can write the proportionality constant (mm to cm) as -

{k} = (20 - 10)/(2 - 1)

{k} = 10

{ 2 } -

We can write the complete table as -

9 cm                  9 x 10 = 90 mm

12.5 cm             12.5 x 10 = 125 mm

50 cm               50 x 10 = 500 mm

88.49 cm          88.49 x 10 = 884.9 mm

Therefore, the proportionality constant (mm to cm) is 10 and the complete table is -

9 cm                 90 mm

12.5 cm             125 mm

50 cm               500 mm

88.49 cm          884.9 mm

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Answer:

k=77

steps:

k/11=7

k=7*11

k=77

Answer:

Step-by-step explanation:

[tex]\tt \cfrac{k}{11} =7[/tex]

The opposite of division is multiplication, so we need multiply both sides by 11:-

[tex]\tt \cfrac{k}{11}\times 11 =7\times 11[/tex]

[tex]\tt k=7\times 11[/tex]

[tex]\tt k=77[/tex]

______________________

Hope this helps! :)

803.84 square inches is the surface area of a cylinder with an 8-inch radius and 8-inch height.

Any solid shape has a surface area equal to the total of the areas of its faces. For instance, to calculate the surface area of a cuboid, we add the areas of all the rectangles that make it up.

The formula for the surface area of a cylinder is given by:

Surface Area = 2πr² + 2πrh

where r is the radius and h is the height of the cylinder, and π (pi) is a mathematical constant approximately equal to 3.14.

Substituting the given values, we get:

Surface Area = 2 × 3.14 × 8² + 2 × 3.14 × 8 × 8

= 401.92 + 401.92

= 803.84 square inches

the surface area of the cylinder with radius 8 inches and height 8 inches is 803.84 square inches.

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Surface Area of cuboid = 2 (lb + bh + hl)

According to the question :

length = x, width = x-5, height = 0.5x

250 = 2 ( x × (x-5) + (x-5) × 0.5x + 0.5x × x )

250 = 2 ( x² - 5x + 0.5x² - 2.5x + 0.5x²)

250 = 2 ( x² - 5x + x² - 2.5x )

250 = 2 ( 2x² - 7.5x )

250 = 4x² - 15 x

4x² - 15x -250 = 0