Help pleaseeeee!!!!!!

Answer:

Step-by-step explanation:

The equation of a line in slope-intercept form is y = mx + b, where m is the slope of the line and b is the y-intercept.

We are given that the line passes through the point (-4, 2) and has a slope of -1. This means that we can substitute the values of the point and slope into the equation and solve for b.

y = mx + b

2 = (-1)(-4) + b

2 = 4 + b

b = -2

Now we know the slope and y-intercept of the line, so we can write the equation in slope-intercept form:

y = -x - 2

Therefore, the equation of the line that passes through the point (-4, 2) and has a slope of -1 is y = -x - 2.

The man had $1.60 at first.

What is an equation?

An equation is a statement that shows that two expressions are equal. It contains an equals sign "=" and may include variables, constants, coefficients, and mathematical operations such as addition, subtraction, multiplication, and division.

Let's assume the man had x amount of money at first.

Then he spent 1/8x on a package of cigarettes and 3 times as much, or 3/8x, on a meal.

So he spent a total of 1/8x + 3/8x = 1/2x of his money.

If he had 80 cents left, that means he spent x - 0.8.

So we can set up an equation:

1/2x = x - 0.8

Solving for x:

1/2x - x = -0.8

-1/2x = -0.8

x = (-0.8)/(-1/2)

x = 1.6

Therefore, the man had $1.60 at first.

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The area of the figure is 18 mm².

The area is the amοunt οf space within the perimeter οf a 2D shape. It is measured in square units, such as cm², m², etc.

Yοu can think οf area as the area inside a given shape οr space. It refers tο hοw much space is taken up. The larger the shape, the larger the area and perimeter οf the shape will be. Nοt tο be cοnfused with vοlume, area οnly refers tο space taken up by a flat οr 2D οbject.

We have given the figure, with all right angles,

Draw an imaginary rectangle of 5 × 6, that covers up the whole figure.

Now,

The area of full rectangle - area of small rectangle = area of the figure

⇒ (6 × 5) - (4 × 3)

⇒ 30 - 12

⇒ 18 mm²

Thus, the area of the figure is 18 mm².

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Answer:

(-8/3, 19/27) and (3, -17/2).

Step-by-step explanation:

To find the coordinates of the points on the graph of ƒ(x) = ½x³ − ¹⁄₂x² − 8x + 7 where the gradient is 4, we need to find the points where the derivative of ƒ(x) is equal to 4.

First, we need to find the derivative of ƒ(x):

ƒ'(x) = 3/2x² - x - 8

Next, we need to set ƒ'(x) = 4 and solve for x:

3/2x² - x - 8 = 4

3/2x² - x - 12 = 0

Multiplying both sides by 2 to eliminate the fraction:

3x² - 2x - 24 = 0

Factoring the quadratic equation:

(3x + 8)(x - 3) = 0

So x = -8/3 or x = 3.

Now we can find the corresponding y-coordinates:

When x = -8/3:

ƒ(-8/3) = 1/2(-8/3)³ - 1/2(-8/3)² - 8(-8/3) + 7 = 19/27

So one point on the graph with gradient 4 is (-8/3, 19/27).

When x = 3:

ƒ(3) = 1/2(3)³ - 1/2(3)² - 8(3) + 7 = -17/2

So another point on the graph with gradient 4 is (3, -17/2).

Therefore, the coordinates of the points on the graph of ƒ(x) = ½x³ − ¹⁄₂x² − 8x + 7 where the gradient is 4 are (-8/3, 19/27) and (3, -17/2).

The jogger's momentum is 512 kg·m/s.

The momentum of an object is defined as the product of its mass and velocity.

Mathematically, momentum (p) can be expressed as:

p = m x v

where m is the mass of the object and v is its velocity.

Momentum is an important concept in physics because it describes the quantity of motion an object possesses. The momentum of an object can be changed by applying a force to it for a certain period of time. This change in momentum is called impulse and is equal to the force multiplied by the time it acts on the object.

In this case, the jogger's mass is given as 64 kg and their velocity is given as 8 m/s. To find their momentum, we can simply multiply these values:

p = m x v

p = 64 kg x 8 m/s

p = 512 kg*m/s

Therefore, the momentum of the jogger is 512 kg*m/s.

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Answer:

s is not inversely proportional to t

Step-by-step explanation:

s is not inversely proportional to t.  I had responded that they were, based on the fact that as s went up, t went down.  But the question was not simply is there an inverse relationship, but are they inversely proportional.

The term proportional means that the relationship between s and t is a constant.  That is:

                                        t = s*(1/x)

Let's rewrite that to y*x = k and then check the numbers.  See the attached spreadsheet.  If the relationship were inversel proportioanl, thaen the product of t*s would be a contant for the series.  The third set is different from the first two.  The data has an is inverse relationship, but it is NOT proportional.

Answer: 364 cm^3

Step-by-step explanation: Please mark brainliest and give thanks!

Answer:

[tex]364cm^3[/tex]

Hope this helps!

Brainliest and a like is much appreciated!

The total cost of the mirror based on its area is obtained as $9.80.

What is area?

An object's area is how much space it takes up in two dimensions. It is the measurement of the quantity of unit squares that completely cover the surface of a closed figure.

The area of the bathroom mirror can be found by multiplying its length and width -

Area = Length × Width

Area = 5 feet × 4 feet

Area = 20 square feet

Since the mirror sells for $0.49 per square foot, we can find the total cost of the mirror by multiplying the area of the mirror by the cost per square foot -

Total Cost = Area × Cost per square foot

Total Cost = 20 square feet × $0.49 per square foot

Total Cost = $9.80

Therefore, the total cost of the bathroom mirror will be $9.80.

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Clara's school is 7 miles west of her house and 3 miles south of her friend Scott's house. Therefore, 5 miles far does Clara bicycle each day.

Given that:

Clara's school is 7 miles west of her house and

3 miles south of her friend Scott's house.

Total distance of Clara's house from her school is 7 miles

Therefore, distance walked by Clara's from home

     = (7 - 3) miles

     = 5 miles.

Therefore, After school, she bicycles from her school to Scott's house. Before dinner, she bicycles home on a bike path that goes straight from Scott's house to her own house. 5 miles far does Clara bicycle each day.

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Answer:

1/6

Step-by-step explanation:

I am assuming you mean the probability of rolling a 3 on a die.

If you are rolling only 1 die, with the numbers 1 through 6, then the chance of landing on any number is 1/6.

For example, the chance of landing on a 2 or 5 are equal, both 1/6.

Therefore, the chance of landing on a die is 1/6.

Hope this helped!

The area of the regular hexagon shaped sandbox is found to be about 28.38 ft².

The sandbox is of the shape of regular hexagon, the area of the hexagon is given by the formula, 3√3a²/2, where, a is the side of the hexagon, the side of the hexagon is give to be 3 ft and the apothem is 3√3 ft.

Now, putting the value in the formula,

Area = 3√3(3)²/2

Area = 23.38 ft²

So, the area of the sandbox is found to be 23.38 ft².

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Answer:

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

Use the distance formula to find the distance between two points.

Substitute coordinates and find the length of AB:

Question :-

Answer :-

[tex] \rule{200pt}{3pt}[/tex]

Solution :-

As per the provided information in the given question, we have been given that :-

To calculate the distance between the two points, we will apply the formula below :-

[tex] \bigstar \: \: \: \boxed{ \sf{ \: \: AB = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} \: \: }}[/tex]

Substitute the given values into the above formula and solve for AB :-

[tex]\sf:\implies{ AB = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}}[/tex]

[tex]\sf:\implies{AB = \sqrt{( - 4 - 2)^2 + (0 - 4)^2}}[/tex]

[tex]\sf:\implies{AB = \sqrt{(-6)^2 + (-4)^2}}[/tex]

[tex]\sf:\implies{AB = \sqrt{36 + 16}}[/tex]

[tex]\sf:\implies\bold{AB = \sqrt{52} \approx 7.21 \: units}[/tex]

Therefore :-

[tex]\\[/tex]

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Have a great day! <33

Answer:

A = (1/4)πr^2

where r is the radius of the circle.

If the side and base mentioned in the question refer to the radius of the circle, then the area of the quadrant can be calculated as follows:

Given, radius (r) = 8 cm

The area of the quadrant = (1/4)πr^2

= (1/4)π(8)^2

= 16π square cm

= 50.27 square cm

Answer: 150%

Step-by-step explanation:

Step-by-step explanation:

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The general expressions for sin(2θ) and cos(2θ) are Sin(2θ) = 2sinθcosθ, and cos(2θ) = cos2θ − sin2θ.

The formula for deriving sin(2θ) and cos(2θ) is as follows:

To derive the sin(2θ) formula, use the following formula: sin (2θ) = 2sinθcosθ

And to derive the cos(2θ) formula, use the following formula: cos(2θ) = cos2θ − sin2θ

From the compound angle formulas, we know that:

Sin (α + β) = sinαcosβ + cosαsinβ, and Cos (α + β) = cosαcosβ − sinαsinβ

We may derive sin(2θ) from the above formulas by putting α = β = θ, which gives us:

Sin (2θ) = sinθcosθ + sinθcosθSin (2θ) = 2sinθcosθcos(2θ) can be derived from the above formula by following these steps:

Cos (2θ) = cosθcosθ − sinθsinθCos (2θ) = cos2θ − sin2θ

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Answer:

You dis not add the option to check all that apply

There are 15 true/false questions on the test and 5 multiple choice questions on the test.

Equations can be written in many forms, but they all have the same basic structure: an expression on the left-hand side of the equals sign, and an expression on the right-hand side of the equals sign, with the equals sign itself indicating that the two expressions are equal.

Let the number of true/false questions be x and the number of multiple choice questions be y. We know that:

x + y = 20 (since there are 20 questions in total)

3x + 11y = 100 (since the test is worth 100 points)

We can solve this system of equations by substitution or elimination. Here, we'll use substitution:

x + y = 20 -> x = 20 - y

Substitute x = 20 - y into the second equation:

3x + 11y = 100

3(20 - y) + 11y = 100

60 - 3y + 11y = 100

8y = 40

y = 5

So there are 5 multiple choice questions on the test. To find the number of true/false questions, we can substitute y = 5 back into x + y = 20:

x + y = 20

x + 5 = 20

x = 15

Therefore, there are 15 true/false questions on the test and 5 multiple choice questions on the test.

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The expression x^4 - 16 is divided by x^3 + 2x^2 + 4x + 8 is x - 2

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

x^4 - 16 is divided by x^3 + 2x^2 + 4x + 8

Using the long division method of quotient, we have

x^3 + 2x^2 + 4x + 8 | x^4 - 16

The division steps are as follows

                                   x - 2

x^3 + 2x^2 + 4x + 8 | x^4 - 16

                                  x^4 + 2x^3 + 4x^2 + 8x

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

                                           -2x^3 - 4x^2 - 8x - 16

                                           -2x^3 - 4x^2 - 8x - 16

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

                                           0

Hence, the quotient is x - 2

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Part A: −Δ[[tex]H2O2[/tex]]/Δt = Δ[[tex]H2[/tex]]/Δt + Δ[[tex]O2[/tex]]/Δt

Part B: −Δ[[tex]H2O2[/tex]]/Δt = Δ[[tex]O2[/tex]]/Δt

Part C: −Δ[[tex]N2O[/tex]]/Δt = 1/2 Δ[[tex]N2[/tex]]/Δt + Δ[[tex]O2[/tex]]/Δt

Part D: −Δ[[tex]N2O[/tex]]/Δt = Δ[[tex]O2[/tex]]/Δt

Part E: −Δ[[tex]N2[/tex]]/Δt = 1/2 Δ[[tex]NH3[/tex]]/Δt

Part F: −Δ[[tex]H2[/tex]]/Δt = Δ[[tex]NH3[/tex]]/Δt

Part G: −Δ[[tex]C2H5NH2[/tex]]/Δt = Δ[[tex]C2H4[/tex]]/Δt + Δ[[tex]NH3[/tex]]/Δt

Part H: −Δ[tex][C2H5NH2][/tex]/Δt = Δ[tex][NH3][/tex]/Δt

The rate of disappearance of [tex]H2O2[/tex]is equal to the sum of the rates of appearance of H2 and O2.

Part B: −Δ[[tex]H2O2[/tex]]/Δt = Δ[[tex]O2[/tex]]/Δt

The rate of disappearance of [tex]H2O2[/tex] is equal to the rate of appearance of O2.

Part C: −Δ[[tex]N2O[/tex]]/Δt = 1/2 Δ[[tex]N2[/tex]]/Δt + Δ[[tex]O2[/tex]]/Δt

The rate of disappearance of N2O is equal to half the rate of appearance of N2 plus the rate of appearance of O2.

Part D: −Δ[[tex]N2O[/tex]]/Δt = Δ[[tex]O2[/tex]]/Δt

The rate of disappearance of [tex]N2O[/tex]  is equal to the rate of appearance of O2.

Part E: −Δ[[tex]N2[/tex]]/Δt = 1/2 Δ[[tex]NH3[/tex]]/Δt

The rate of disappearance of N2 is equal to half the rate of appearance of[tex]NH3.[/tex]

Part F: −Δ[[tex]H2[/tex]]/Δt = Δ[[tex]NH3[/tex]]/Δt

The rate of disappearance of H2 is equal to the rate of appearance of NH3.

Part G: −Δ[[tex]C2H5NH2[/tex]]/Δt = Δ[[tex]C2H4[/tex]]/Δt + Δ[[tex]NH3[/tex]]/Δt

The rate of disappearance of[tex]C2H5NH2[/tex] is equal to the sum of the rates of appearance of[tex]C2H4[/tex] and [tex]NH3.[/tex]

Part H: −Δ[tex][C2H5NH2][/tex]/Δt = Δ[tex][NH3][/tex]/Δt

The rate of disappearance of [tex]C2H5NH2[/tex] is equal to the rate of appearance of [tex]NH3.[/tex]

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The land will cost approximately $52,800.00.

What is triangle ?

A triangle is a polygon with three sides and three angles. It is one of the simplest and most basic shapes in geometry. The three sides of a triangle can be of different lengths, and the three angles can also be of different sizes. The sum of the angles in a triangle is always 180 degrees.

To find the area of the triangular lot, we can use Heron's formula for the area of a triangle:

s = (1360 + 1850 + 2430)/2 = 2820

A = √[s(s-1360)(s-1850)(s-2430)] ≈ 1,046,482.74 square feet

To convert this to acres, we divide by 43,560:

A ≈ 24.00 acres

Finally, we can calculate the cost of the land by multiplying the area in acres by the price per acre:

cost = 24.00 acres × $2200/acre ≈ $52,800.00

Therefore, the land will cost approximately $52,800.00.

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A 95% confidence interval for the population mean reduction in cholesterol level is (19.78, 28.22) mg/dl, based on a sample mean of 24 mg/dl and a standard deviation of 15 mg/dl.

Using the information, we can compute a confidence interval  for the population mean decrease in cholesterol level as follows:

1. Calculate the standard error of the mean:

standard error = standard deviation/sqrt(sample size)

= 15/sqrt(50)

= 2.12

2. Calculate the margin of error using a t-distribution with (n-1) degrees of freedom at 95% confidence level:

margin of error = t_(n-1, 0.025) * standard error

= t_(49, 0.025) * 2.12 (using a t-table)

= 2.009 * 2.12

= 4.26

3. Calculate the confidence interval by subtracting and adding the margin of error to the sample mean:

CI = sample mean +/ - margin of error

= 24 +/ - 4.26

= (19.74, 28.26)

In this manner, we can say with 95% certainty that the true mean reduction in cholesterol level following one month of drug of the new medication is between 19.74 mg/dl and 28.26 mg/dl. Since the lower limit reaches the confidence interval (19.74 mg/dl) is greater than 20 mg/dl, we can reason that there is persuading proof that the new medication is powerful in lessening cholesterol level following one month of purpose.

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The cosine of θ is the ratio of the length of the adjacent side to the length of the hypotenuse

The cosine of an angle is a trigonometric function that relates the length of the adjacent side of a right triangle to the length of the hypotenuse. Specifically, it is defined as the ratio of the length of the adjacent side to the length of the hypotenuse.

In mathematical terms, if we have a right triangle where one of the angles is labeled as theta (θ), then the cosine of theta is given by the formula:

cos(θ) = adjacent side / hypotenuse

1) Cos R =30/34 =15/17

Cos S = 16/34 = 8/17

2) Cos R = 24/26 = 12/13

Cos S = 10/26 = 5/13

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Answer:

≈ 50 cm²

Step-by-step explanation:

Use the equation [tex]A= \frac{1}{4} \pi d^{2}[/tex] Where d is the diameter.

Answer:

The answer that you're looking for is approximately 50 (rounded), In terms of π, it is 16π.

Step-by-step explanation:

In order to find the area you need to use the formula: Area = [tex]\pi r^{2}[/tex].

Since The Diameter is double the amount of the radius you need to make sure to divide the diameter by 2 and replace "r" in the equation with the equation given.

8/2 gives you 4.  Now you have the equation Area of Circle =  [tex]\pi 4^{2}[/tex].

Following the rules of PEMDAS we do exponents since there is no parenthesis.

[tex]4^{2}[/tex] is the same as 16. In terms of pi, you just put pi next to your result giving 16π.

However, if you want to find out normally you can multiply with either 3.14 or π.

Both cases will give you different decimals, but when rounded to the nearest whole number they all give you 50.

Area of Circle  = [tex]\pi r^{2}[/tex].
Area of Circle  = [tex]\pi 4^{2}[/tex]
Area of Circle  = 16π
Area of Circle = 50 (rounded).

I hope this was helpful!

The required volume of the given sphere is 904.32 cm³.

A sphere is a geometrical object that resembles a two-dimensional circle in three dimensions.

In three-dimensional space, a sphere is a collection of points that are all located at the same distance from a single point.

The radius of the sphere is denoted by the letter r, and the specified point represents its center.

All of the points on a circle are equally spaced apart from the center along a plane, but all of the points on a sphere are equally spaced apart from the center along any of the axes.

So, we must ascertain the sphere's volume. With a radius of 6 cm, we have:

V = 4/3 π r^3

V = 4/3 x 3.14 x 6^3

V = 4/3 x 3.14 x 216

V = 904.32  

Therefore, the required volume of the given sphere is 904.32 cm³.

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Complete question:

Find the volume of the sphere.

Either enter an exact answer in terms of \piπpi or use 3.143.143, point, 14 for \piπpi and round your final answer to the nearest hundredth.

The simplified expression, expressed in expanded form, is (3m - y)/(12m + 2y).

To simplify the expression (6m² - 5my - y²)/(12m + 2y), we can factor the numerator and denominator, if possible, and then simplify the expression by canceling out common factors.

The numerator can be factored as follows:

6m² - 5my - y² = (3m - y)(2m + y)

The denominator can also be factored by factoring out a common factor of 2:

12m + 2y = 2(6m + y)

Now we can substitute these factorizations back into the original expression:

(6m² - 5my - y²)/(12m + 2y) = [(3m - y)(2m + y)]/[2(6m + y)]

We can now cancel out the common factor of (2m + y) in the numerator and denominator:

[(3m - y)(2m + y)]/[2(6m + y)] = (3m - y)/(2(6m + y))

Expanding this expression, we get:

(3m - y)/(2(6m + y)) = (3m - y)/(12m + 2y)

Therefore, the simplified expression, in expanded form, can be written as (3m - y)/(12m + 2y).

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A) To the nearest 0.1°, [tex]$\angle ABC\approx63.8\textdegree$[/tex] and B) AC is approximately 4.2 units long, correct to 1 decimal place.

A) We can use the law of cosines to solve for the angles of triangle ABC and then use the fact that opposite angles in a cyclic quadrilateral are supplementary to find angle ADC. Finally, we can use the law of cosines again to find AC.

Let angle ABC be x. Then, applying the law of cosines to triangle ABC, we have:

[tex]$AC^2=AB^2+BC^2-(2AB* BC*\cos(x))$[/tex]

Substituting the given values, we get:

[tex]$AC^2=5^2+4.5^2-2\cdot5\cdot4.5\cdot\cos(x)$[/tex]

Simplifying and solving for AC, we get:

[tex]$AC=\sqrt{3.125+11.25\cos(x)-10\cos^2(x)}$[/tex]

Next, applying the law of cosines to triangle BCD, we have:

[tex]$\cos(ADC)=\frac{3.4^2+4.5^2-(2*3.4*4.5*\cos(x))}{3.4*4.5}$[/tex]

Simplifying, we get:

[tex]$\cos(ADC)=\frac{29.15-15.3\cos(x)}{15.3}$[/tex]

Since ABCD is a cyclic quadrilateral, we have:

[tex]$\angle ADC=180\textdegree-\angle ABC=180\textdegree-x$[/tex]

Substituting this into the above equation and solving for [tex]$\cos(x)$[/tex], we get:

[tex]$\cos(x)=\frac{7.2}{15.3}$[/tex]

Using a calculator, we find that

[tex]$x\approx63.8\textdegree$[/tex].

Therefore, [tex]$\angle ADC\approx116.2\textdegree$[/tex].

B) Finally, substituting [tex]$x\approx63.8\textdegree$[/tex] into the expression for AC, we get:

[tex]$AC=\sqrt{3.125+11.25\cos(63.8\textdegree)-10\cos^2(63.8\textdegree)}$[/tex]

[tex]$AC\approx4.2$[/tex]

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Question:

ABCD is a cyclic quadrilateral with AB=5.6cm,BC=4.5cm,CD=3.4cm and AD=2.5cm.Calculate

a)B in ABC

b)AC?

The solution to the system of equations is (3, -7).

To find the solution of these two equations, we need to find the values of x and y that satisfy both equations simultaneously.

We can set the two equations equal to each other to get:

-5x + 8 = x/3 - 8

Multiplying both sides by 3, we get:

-15x + 24 = x - 24

Simplifying, we get:

-16x = -48

Dividing both sides by -16, we get:

x = 3

Now that we know x = 3, we can substitute it into either of the original equations to find y. Let's use the equation y = -5x + 8:

y = -5(3) + 8 = -7

Therefore, the solution to the system of equations is (3, -7).

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The exact price of the chair including tax is $425.25. The solution has been obtained by using arithmetic operations.

What are arithmetic operations?

The four fundamental operations, also referred to as "arithmetic operations," are said to be able to explain all real numbers. The four mathematical operations following division, multiplication, addition, and subtraction are quotient, product, sum, and difference.

We are given that the original price of a chair was $450.00 and on it, there was tax of 5.5%.

So, using the arithmetic operations, we get

⇒Exact price = 450 - 5.5% of 450

⇒Exact price = 450 - 24.75

⇒Exact price = $425.25

Hence, the exact price of the chair including tax is $425.25.

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The table of values for the function y=4-7x can be found by choosing any real value of x and we will get real value output from the function. So  the table C is found to be correct for the function f(x)=4-7x.

For example, let's choose some values of x and calculate the corresponding values of y:

When x = 0, y = 4 - 7(0) = 4

When x = 1, y = 4 - 7(1) = -3

When x = 2, y = 4 - 7(2) = -10

When x = 3, y = 4 - 7(3) = -17

We can continue this process to find more values of y for different values of x.

The resulting table of values is:

x y

0 4

1 -3

2 -10

3 -17

So, this is the table of values defined by the function y=4-7x.

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The complete question is :

Which table of values is defined by the function y=4-7x

Table A                  Table B                       Table C                            Table D

x          y                 x          y                       x          y                           x          y

0         4                 0          0                      0          4                          0         -4

1          3                  1          1                        1          -3                         1          -3          

2          10               2          2                       2        -10                        2         -10

3         17                 3          3                       3        -17                        3         -17

Probability of X Wins with Biased Wheel: 0.0378

X, the Number of Winning Rounds: 36

Net Profit from X Wins: $1,260

Probability of X Wins with Biased Wheel: 0.0378 (rounded to 4 significant figures)

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