Please help me fast.

Answer: 0.84375

Step-by-step explanation:

1. x = 5.4n

2. 5.4n + n = 5.4

3. n(6.4) = 5.4

4. n = 0.84375

DOUBLE CHECK

x = 5.4(0.84375)

x = 4.55625

4.55625 + 0.84375 = 5.4

0.84375 = 5.4 - 4.55625

0.84375 = 0.84375

The solution is, : for 0.84375 = N such that x+N=5.4 and x/n=5.4 are equivalent equations.

An equation is a  mathematical statement that is made up of two expressions connected by an equal sign.  In its simplest form in algebra, the definition of an equation is a mathematical statement that shows that two mathematical expressions are equal.

Here, we have,

the given equations are:

1. x = 5.4n

2. 5.4n + n = 5.4

3. n(6.4) = 5.4

4. n = 0.84375

DOUBLE CHECK

x = 5.4(0.84375)

x = 4.55625

4.55625 + 0.84375 = 5.4

0.84375 = 5.4 - 4.55625

0.84375 = 0.84375

Hence, The solution is, : for 0.84375 = N such that x+N=5.4 and x/n=5.4 are equivalent equations.

To learn more on equation click:

brainly.com/question/24169758

#SPJ2

We can use 740.8 grams of trans-cinnamic acid based on the m moles listed in the lab manual.  The lab manual, you would first need to know the molar mass of trans-cinnamic

To determine how many grams of trans-cinnamic acid should be used based on the m moles listed in the lab manual, we would first need to know the molar mass of trans-cinnamic acid. The molar mass of trans-cinnamic acid is 148.16 g/mol.

Next, you would need to determine the number of m moles of trans-cinnamic acid that the lab manual specifies. Let's say, for example, that the lab manual specifies using 5 m moles of trans-cinnamic acid.

To convert m moles to grams, you would use the following formula:

mass (g) = mmoles x molar mass

So, to find the mass of 5 m moles of trans-cinnamic acid:

mass (g) = 5 x 148.16
mass (g) = 740.8

Therefore, you would use 740.8 grams of trans-cinnamic acid based on the m moles listed in the lab manual.

to learn more about molar mass click here:

https://brainly.com/question/26712238

#SPJ11

So the probability of drawing a card that is a queen or a club is 4/13.

There are 4 queens and 13 clubs in a standard deck of 52 playing cards. However, the queen of clubs is counted in both groups, so we need to subtract it once. Therefore, the total number of cards that are either a queen or a club (excluding the queen of clubs) is 4 + 13 - 1 = 16.

The probability of drawing a card that is either a queen or a club is the number of desired outcomes (16) divided by the total number of possible outcomes (52):

P(queen or club) = 16/52 = 4/13

So the probability of drawing a card that is a queen or a club is 4/13.

learn more about probability

https://brainly.com/question/30034780

#SPJ11

Therefore, the derivative (Use symbolic notation and fractions where needed). [tex]f'(x)=4x^3[/tex].

Using the Power Rule to compute the derivative:

[tex]f(x) = x^2 + 16x[/tex]

[tex]f'(x) = d/dx (x^2 + 16x)[/tex]

[tex]= d/dx (x^2) + d/dx (16x)[/tex](using the linearity property)

[tex]= 2x + 16[/tex] (using the Power Rule)

Therefore, [tex]f'(x) = 2x + 16.[/tex]

Computing f'(x) using the limit definition:

[tex]f(x) = x^2 + 16x[/tex]

[tex]f'(x) = lim(h - > 0) [(f(x+h) - f(x))/h][/tex]

[tex]= lim(h - > 0) [(x+h)^2 + 16(x+h) - (x^2 + 16x))/h][/tex]

[tex]= lim(h - > 0) [x^2 + 2xh + h^2 + 16x + 16h - x^2 - 16x]/h[/tex]

[tex]= 2x + 16[/tex]

Therefore, [tex]f'(x) = 2x + 16.[/tex]

Calculating the derivative using the product rule:

[tex]Q(r) = (1 - 4r)(6r + 5)[/tex]

[tex]Q'(r) = d/dx [(1 - 4r)(6r + 5)][/tex]

[tex]= (d/dx (1 - 4r))(6r + 5) + (1 - 4r)(d/dx (6r + 5))[/tex] (using the product rule)

[tex]= (-4)(6r + 5) + (1 - 4r)(6)[/tex] (taking the derivatives of the individual factors)

[tex]= -24r - 20 + 6 - 24r[/tex]

[tex]= -48r - 14[/tex]

Therefore, Q'(r) = -48r - 14.

Calculating the derivative:

[tex]f(x) = 12x^{(5/4)} + 3x^{(-3/12)}+ 5x[/tex]

[tex]f'(x) = d/dx (12x^{(5/4)} + 3x^{(-3/12)} + 5x)[/tex]

[tex]= 12(d/dx x^{(5/4))} + 3(d/dx x^{(-3/12))} + 5(d/dx x)[/tex] (using the linearity property)

[tex]= 12(5/4)x^{(1/4)} - 3(3/12)x^{(-15/12)} + 5[/tex](using the Power Rule and the Chain Rule)

[tex]= 15x^{(1/4)} - 9x^{(-5/4)} + 5[/tex]

Therefore,[tex]f'(x) = 15x^{(1/4)} - 9x^{(-5/4)} + 5.[/tex]

Calculating the derivative:

[tex]f(x) = 9y^2 + 30x^4/15[/tex]

[tex]f'(x) = d/dx (9y^2 + 30x^4/15)[/tex]

[tex]= 0 + 4x^3[/tex] (taking the derivative of the second term and simplifying)

[tex]= 4x^3[/tex]

To know more about derivative visit:

https://brainly.com/question/25324584

#SPJ1

The simplified expression is [tex]\frac{2x}{x-1}[/tex].

Expression  - An expression or algebraic expression is any mathematical statement which consists of numbers, variables and an arithmetic operation between them.

To simplify the expression, we can factor out a 4x from the numerator and a 2 from the denominator, which gives:

[tex]=\frac{4x^2+4x}{2x^2-2}\\\\ = \frac{4x(x+1)}{2(x^2-1)} \\\\ = \frac{2\cdot 2x(x+1)}{2(x-1)(x+1)} \\\\ = \frac{2x}{x-1}[/tex]

To know more about simplify, visit:

brainly.com/question/28770219

#SPJ1

The smallest possible value of nullity(a) is 0, and the largest possible value of nullity(a) is 4. To determine the minimum and maximum possible values of nullity(a) for a 7 × 4 matrix, we need to consider the properties of a matrix and nullity.

Nullity(a) is defined as the dimension of the null space of the matrix 'a'. It is also equal to the number of linearly independent columns in the matrix that are not part of its column space.
Since the matrix is a 7 × 4 matrix, it has 4 columns. The rank-nullity theorem states that:
rank(a) + nullity(a) = number of columns in matrix 'a'
The minimum possible value of nullity(a) occurs when all columns are linearly independent, which would mean the rank of the matrix is at its maximum value. In this case, the maximum rank of a 7 × 4 matrix is 4. So, the smallest possible value of nullity(a) is: nullity(a) = number of columns - rank(a)
nullity(a) = 4 - 4 = 0
The maximum possible value of nullity(a) occurs when the rank of the matrix is at its minimum value. In this case, the minimum rank of a 7 × 4 matrix is 0. So, the largest possible value of nullity(a) is: nullity(a) = number of columns - rank(a)
nullity(a) = 4 - 0 = 4
To summarize, the smallest possible value of nullity(a) is 0, and the largest possible value of nullity(a) is 4.

Learn more about nullity here, https://brainly.com/question/30891321

#SPJ11

The dimension of the solution space is 2. Therefore, the answer is (B) 2.

The rank of a matrix A is defined as the maximum number of linearly independent rows or columns in A.

Therefore, if the rank of a 7 x 6 matrix A is 4, it means that there are 4 linearly independent rows or columns in A, and the other 3 rows or columns can be expressed as linear combinations of the 4 independent ones.

The equation Az = 0 represents a homogeneous system of linear equations, where z is a column vector of unknowns.

The dimension of the solution space of this system is equal to the number of unknowns minus the rank of the coefficient matrix A.

In this case, A has 6 columns and rank 4, so the number of unknowns is 6 and the dimension of the solution space is 6 - 4 = 2. Therefore, the answer is (B) 2.

Learn more about rank homogeneous linear systems

brainly.com/question/30504189

#SPJ11

Answer:

The answer for x is 37° to the nearest whole number

Answer:

the answer of X is 37° to the nearest whole number

A particular solution will have the form (At^2 + Bt + C)e^(-3t), where A, B, and C are undetermined coefficients.

To determine the form of a particular solution for each differential equation, we need to consider the form of the nonhomogeneous term and choose a solution that has the same form, but with undetermined coefficients.

27. The nonhomogeneous term is 4t sin 3t, which is a product of a polynomial and a sine function. Therefore, a particular solution will have the form At^2 sin 3t + Bt cos 3t, where A and B are undetermined coefficients.

28. The nonhomogeneous term is 5te3, which is a product of a polynomial and an exponential function. Therefore, a particular solution will have the form (At^2 + Bt + C)e3t, where A, B, and C are undetermined coefficients.

29. The nonhomogeneous term is t4e, which is a product of a polynomial and an exponential function. Therefore, a particular solution will have the form (At^5 + Bt^4 + Ct^3 + Dt^2 + Et + F)e^t, where A, B, C, D, E, and F are undetermined coefficients.

30. The nonhomogeneous term is 7e^t cos t, which is a product of an exponential and a cosine function. Therefore, a particular solution will have the form (Acos t + Bsin t)e^t, where A and B are undetermined coefficients.

31. The nonhomogeneous term is 8t'e sin t, which is a product of a polynomial and a sine function. Therefore, a particular solution will have the form (At^2 + Bt + C)cos t + (Dt^2 + Et + F)sin t, where A, B, C, D, E, and F are undetermined coefficients.

32. The nonhomogeneous term is 2t^2 e^(-3t), which is a product of a polynomial and an exponential function. Therefore, a particular solution will have the form (At^2 + Bt + C)e^(-3t), where A, B, and C are undetermined coefficients.

to learn more about coefficients click here:

https://brainly.com/question/30514302

#SPJ11

Answer: (x - y) = 13/6

Step-by-step explanation: To find the value of (x-y), we need to substitute the given values of x and y and then perform the subtraction.

So,

(x - y) = (5/3 - (-1/6))

We can simplify this expression by first converting the negative fraction to its equivalent positive fraction and then finding the common denominator.

(x - y) = (5/3 + 1/6) = ((10+3)/6) = 13/6

Therefore, (x - y) = 13/6.

Share Prompt

Answer:

11/6

Step-by-step explanation:

Use substitution.

x = 5/3

y = -1/6

Sub these values into (x-y):

[(5/3) - (-1/6)]

*Make sure to use brackets when subbing in values especially when there are negative signs or exponents

5/3 + 1/6 ⇒ two negatives become a positive

10/6 + 1/6 ⇒ make a common LCD

= 11/6

The two sets of possible dimensions (length and width) of the rectangular plot are:  Length = 21 meters, Width = 13 meters

                                    Length = 8.5 meters, Width = 38 meters

Let L be the length and W be the width of the rectangular plot. We know that the perimeter of the rectangular plot is 55 meters, which can be expressed as:

2L + W = 55

We also know that the area of the rectangular plot is 342 square meters, which can be expressed as:

L * W = 342

We can use these two equations to solve for L and W:

W = 55 - 2L

L * (55 - 2L) = 342

Expanding the left side of the equation and rearranging terms, we get:

2L² - 55L + 342 = 0

We can solve this quadratic equation for L using the quadratic formula:

L = (55 ± √(55² - 42342)) / (2*2)

L = (55 ± √(841)) / 4

L = (55 ± 29) / 4

L = 21 or L = 8.5

Substituting these values of L back into the equation 2L + W = 55, we can solve for the corresponding values of W:

When L = 21, W = 55 - 2L = 13

When L = 8.5, W = 55 - 2L = 38

Therefore, the two sets of possible dimensions (length and width) of the rectangular plot are:

Length = 21 meters, Width = 13 meters

Length = 8.5 meters, Width = 38 meters

Learn more about Linear equations here:

brainly.com/question/11897796

#SPJ1

a. This statement is true. We can write b = ak and d = cl for some integers k and l. Then, b + d = ak + cl = a(k + l). Since a|b, we know a must divide ak and thus a also divides ak + cl. Therefore, a + d = a(k + l) is divisible by a.

b. This statement is also true. Similar to part a, we can write b = ak and d = cl for some integers k and l. Then, bd = akcl = (ac)(kl). Since a|b and c|d, we know that a and c must divide ak and cl respectively. Therefore, ac must divide akcl = bd.

c. This statement is false. Consider a = 2, b = 4, c = 2, and d = 6. We have a|b and b|c, but a does not divide c. Therefore, the statement does not hold for all integers a, b, c, and d.

To know more about divisible click on below link:

https://brainly.com/question/21416852#

#SPJ11

a. This statement is true. We can write b = ak and d = cl for some integers k and l. Then, b + d = ak + cl = a(k + l). Since a|b, we know a must divide ak and thus a also divides ak + cl. Therefore, a + d = a(k + l) is divisible by a.

b. This statement is also true. Similar to part a, we can write b = ak and d = cl for some integers k and l. Then, bd = akcl = (ac)(kl). Since a|b and c|d, we know that a and c must divide ak and cl respectively. Therefore, ac must divide akcl = bd.

c. This statement is false. Consider a = 2, b = 4, c = 2, and d = 6. We have a|b and b|c, but a does not divide c. Therefore, the statement does not hold for all integers a, b, c, and d.

To know more about divisible click on below link:

https://brainly.com/question/21416852#

#SPJ11

Answer:

Publix gives out approximately 12,890.5 cookies, with a margin of error of 1745.1.

Step-by-step explanation:

The survey of 100 store managers found that the average number of cookies given out on a weekday was 15.5, with a margin of error of 2.1.

This means that the true average number of cookies given out on a weekday at all Publix locations in Florida is estimated to be between 13.4 and 17.6, with 95% confidence.

Since Publix has 831 locations in Florida, we can estimate the total number of cookies given out on a weekday by multiplying the average number of cookies by the number of locations:

Total number of cookies = 15.5 * 831 = 12,890.5

Since this is just an estimate based on a sample of 100 stores, there is some uncertainty in this number. The margin of error for the total number of cookies can be calculated using the margin of error for the sample mean and the formula:

Margin of error for total number of cookies = Margin of error for sample mean * Number of locations

Using the margin of error of 2.1, we get:

Margin of error for total number of cookies = 2.1 * 831 = 1745.1

Therefore, we can estimate that on a weekday, Publix gives out approximately 12,890.5 cookies, with a margin of error of 1745.1.

Hope this helps!

Answer:

Publix gives out approximately 12,890.5 cookies, with a margin of error of 1745.1.

Step-by-step explanation:

The survey of 100 store managers found that the average number of cookies given out on a weekday was 15.5, with a margin of error of 2.1.

This means that the true average number of cookies given out on a weekday at all Publix locations in Florida is estimated to be between 13.4 and 17.6, with 95% confidence.

Since Publix has 831 locations in Florida, we can estimate the total number of cookies given out on a weekday by multiplying the average number of cookies by the number of locations:

Total number of cookies = 15.5 * 831 = 12,890.5

Since this is just an estimate based on a sample of 100 stores, there is some uncertainty in this number. The margin of error for the total number of cookies can be calculated using the margin of error for the sample mean and the formula:

Margin of error for total number of cookies = Margin of error for sample mean * Number of locations

Using the margin of error of 2.1, we get:

Margin of error for total number of cookies = 2.1 * 831 = 1745.1

Therefore, we can estimate that on a weekday, Publix gives out approximately 12,890.5 cookies, with a margin of error of 1745.1.

Hope this helps!

[tex]\begin{cases} (x-1)^2-(x+2)^2=9y\\\\ (y-3)^2-(y+2)^2=5x \end{cases} \\\\[-0.35em] ~\dotfill\\\\ (x-1)^2-(x+2)^2=9y\implies (x^2-2x+1)-(x^2+4x+4)=9y \\\\\\ (x^2-2x+1)-x^2-4x-4=9y\implies -6x-3=9y\implies -3(2x+1)=9y \\\\\\ 2x+1=\cfrac{9y}{-3}\implies 2x+1=-3y\implies 2x=-3y-1\implies x=\cfrac{-3y-1}{2} \\\\[-0.35em] ~\dotfill\\\\ (y-3)^2-(y+2)^2=5x\implies (y^2-6y+9)-(y^2+4y+4)=5x \\\\\\ (y^2-6y+9)-y^2-4y-4=5x\implies -10y+5=5x[/tex]

[tex]\stackrel{\textit{substituting from above}}{-10y+5=5\left( \cfrac{-3y-1}{2} \right)}\implies -10y+5=\cfrac{-15y-5}{2} \\\\\\ -20y+10=-15y-5\implies 10=5y-5\implies 15=5y \\\\\\ \cfrac{15}{5}=y\implies \boxed{3=y} \\\\\\ \stackrel{\textit{since we know that}}{x=\cfrac{-3y-1}{2}}\implies x=\cfrac{-3(3)-1}{2}\implies \boxed{x=-5}[/tex]

At a 95% confidence level, the margin of error is approximately 0.762 (rounded to three decimal places).

To find the margin of error at a 95% confidence level, we need to first find the critical value associated with a sample size of 29 and a confidence level of 95%.

Using a t-distribution with n-1 degrees of freedom, we can find the critical value using a t-table or calculator. For n=29 and a confidence level of 95%, the critical value is approximately 2.045 (rounded to three decimal places).

The formula for the margin of error is:

Margin of error = critical value * (standard deviation / sqrt(sample size))

Plugging in the values we have:

Margin of error = 2.045 * (2 / sqrt(29))
Margin of error ≈ 0.762

Therefore, at a 95% confidence level, the margin of error is approximately 0.762 (rounded to three decimal places).

Viait to know more about Margin of error:-

brainly.com/question/10218601

#SPJ11

As the Smaller photo: 10 cm  x 10 cm which equals to the dimension of wallet. Thus, the smaller photo will fit into Grace's wallet.

A quadrilateral featuring four right angles is a rectangle. As a result, a rectangle's angles are all equal (360°/4 = 90°). A rectangle also has parallel and equal opposite sides, and its diagonals cut it in half.

The three characteristics of a rectangle are as follows:

Given data:

Dimensions of  photo:

Dimensions of rectangle wallet :

The dimension of the smaller photo must be less than equal to width of the wallet to get fit inside it.

As the Smaller photo: 10 cm  x 10 cm which equals to the dimension of wallet. Thus, the smaller photo will fit into Grace's wallet.

Know more about the features of rectangle:

https://brainly.com/question/12190011

#SPJ1

Complete question:

Grace had her photo printed in two different sizes. One is 11cm x 11 cm and second is 10cm x 10 cm  If her wallet is in the shape of a rectangle 11cm long and 10cm wide, can the smaller photo fit into her wallet?

To evaluate the iterated integral ∫∫∫ 2z ln(x) xe^(-y) dy dx dz over the limits 0 ≤ y ≤ 6, 0 ≤ x ≤ 8, and 0 ≤ z ≤ 1, we begin by integrating the innermost integral with respect to y first, then the middle integral with respect to x, and finally the outermost integral with respect to z.

So, integrating with respect to y first, we get:
∫∫∫ 2z ln(x) xe^(-y) dy dx dz = ∫∫∫ 2z ln(x) (-e^(-y) + C) dx dz
where C is the constant of integration.
Next, integrating with respect to x, we get:
∫∫∫ 2z ln(x) (-e^(-y) + C) dx dz = ∫∫ 2z (-ln(x)e^(-y) + Cx) |_0^8 dz
= ∫∫ 16z(ln(8)e^(-y) - C) dz
= 16(ln(8)e^(-y) - C)z^2/2 |_0^1
= 8(ln(8)e^(-y) - C)
Finally, integrating with respect to z, we get:
∫∫ 8(ln(8)e^(-y) - C) dz = (8/2)(ln(8)e^(-y) - C)(1^2 - 0^2)
= 4(ln(8)e^(-y) - C)
Therefore, the value of the iterated integral over the given limits is 4(ln(8)e^(-6) - C), where C is a constant of integration.

FOR MORE INFORMATION ON integral SEE;

https://brainly.in/question/4615818

#SPJ11

An expression that shows the total number of chairs in the auditorium is 9(6+4).

Given that, there are 54 green chairs and 36 red chairs in an auditorium.

To determine the number of green chairs and red chairs in each row, divide 54 and 36 by 9. This gives us 6 green chairs and 4 red chairs in each row.

The total number of chairs can be expressed as the product of 9 and the sum of the green chairs and red chairs in each row.

This is represented by the expression 9(6+4), which is equal to 90 chairs.

Therefore, an expression that shows the total number of chairs in the auditorium is 9(6+4).

To learn more about an expression visit;

https://brainly.com/question/28170201

#SPJ1

Answer:

C

Step-by-step explanation:

K^2 + 4

Answer:k^2+4

Step-by-step explanation:

A parameterization of curves in the xy-plane requires us to provide a function in terms of a parameter θ, which is usually the angle associated with a point on the curve. The parameters need to be adjusted according to the size and center of the curve, as well as the direction of tracing.

A circle is a two-dimensional shape representing a round, enclosed area with a curved line, or perimeter, usually drawn with a pencil or pen. A circle has no beginning or end and is composed of a single line that forms a continuous loop. A circle is often referred to as a round shape, though its shape is technically an ellipse. A circle's area is determined by its radius, which is the distance from the center of the circle to its perimeter. The circumference of a circle is the total length of its perimeter. Circles are found everywhere in nature and have been used in various forms of art and design throughout history.

1. A circle of radius 3 centered at the origin and traced out clockwise:
x = 3cosθ, y = 3sinθ, where 0 ≤ θ ≤ 2π.

2. A circle of radius 5 centered at the point (2, 1) and traced out counterclockwise:
x = 2 + 5cosθ, y = 1 + 5sinθ, where 2π ≤ θ ≤ 0.

In conclusion, a parameterization of curves in the xy-plane requires us to provide a function in terms of a parameter θ, which is usually the angle associated with a point on the curve. The parameters need to be adjusted according to the size and center of the curve, as well as the direction of tracing.

To know more about circle click-
https://brainly.com/question/27961297
#SPJ1

The measure of the angle in radians is approximately 1.9099 radians and Where radian_angle represents the angle's measure in radians, degree_angle represents the angle's measure in degrees, and π (pi) is approximately 3.1416


a. To convert an angle of 110 degrees to radians, we can use the following conversion formula:

[tex]radians = \frac{(degrees × π) }{180}[/tex]

Step 1: Plug in the given angle (110 degrees) into the formula:
[tex]radians= \frac{110×π}{180}[/tex]

Step 2: Calculate the value:
[tex]radians= \frac{(110)(3.1416)}{180} = \frac{343.7756}{180} = 1.9000[/tex]

So, the measure of the angle in radians is approximately 1.9099 radians.

b. To write a general formula that expresses the radian angle measure of an angle, in terms of the degree measure of that angle, you can use the following formula:
[tex]radian angle= \frac{degree angle x π}{180}[/tex]

Where radian_angle represents the angle's measure in radians, degree_angle represents the angle's measure in degrees, and π (pi) is approximately 3.1416.

To know more about conversions from "degree to radian" refer here:

https://brainly.com/question/11236954#

#SPJ11

Answer:

27.5%

Step-by-step explanation:

Let's denote the total marks of the exam as 'T'.

We know that Tarang got 25% marks and failed by 64 marks, so we can write an equation:

0.25T - 64 = 0 (since he failed)

Solving for T, we get:

T = 256

We also know that if Tarang had got 40% marks, he would have secured 32 marks more than the pass marks. So we can write another equation:

0.4T - Pass marks = 32

Substituting T = 256, we get:

0.4(256) - Pass marks = 32

102.4 - Pass marks = 32

Pass marks = 70.4

Therefore, to pass the exam, Tarang needs to get at least 70.4/T * 100% = 27.5% marks (rounded to one decimal place).

The possible zeros of the polynomial are -2, -3/2 and  4.

The zeros of the function is calculated as follows;

The zeros of the function are the values of x that will make the function equal to zero.

let x = -2

f(x) = 2x³ - x² - 22x - 24

f(-2) = 2(-2)³ - (-2)² - 22(-2) - 24

f(-2) = -16 - 4 + 44 - 24

f(-2) = 0

So, x + 2 is a factor of the polynomial, and other zeros of the polynomial is calculated as;

                       2x² - 5x - 12

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

         x + 2    √ 2x³ - x² - 22x  - 24

                  - (2x³ +  4x²)

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

                              -5x² - 22x -24

                            - (-5x² - 10x)

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

                                       -12x - 24

                                    - (-12x - 24)

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

                                              0

 2x² - 5x - 12 , so will factorize this quotient as follows;

= 2x² - 8x + 3x - 12

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

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

2x + 3 = 0

or

x - 4 = 0

x = -3/2 or 4

Learn more about zeros of polynomial here: https://brainly.com/question/28560646

#SPJ1

Answer: this is how to do it

Step-by-step explanation: x=−3.

x=−4, y=−6

xy-3x=40, x=5

x(y-3)=40

y-3=(40/x)

y=(40/x)+3

y=(40/5)+3

y=8+3

y=11

The p-value for testing the association between PSA and CAPSULE variation by ethnicity is 0.0231. For Black patients, the odds ratio for tumor penetration with a 10-unit PSA increase is 1.6. For White patients, the odds ratio for tumor penetration with a 10-unit PSA increase is 1.3.

The p-value for the LRT can be obtained from the difference in deviance between the two models and comparing it to a chi-squared distribution with 1 degree of freedom. From the given output, the full model has a deviance of 328.12 and the reduced model has a deviance of 329.42. The difference in deviance is 1.3, and the corresponding p-value is 0.253. Therefore, the p-value the researchers should use is 0.253.

To find the estimated odds ratio of tumor penetration associated with a ten unit increase in PSA for Black patients, we look at the coefficient for the interaction term between PSA and Ethnicity (Black) in the output, which is 0.0396. The odds ratio is given by exp(β), where β is the coefficient. So, exp(0.0396*10) = 1.43, which means that for Black patients, a ten unit increase in PSA is associated with a 43% increase in the odds of tumor penetration, controlling for digital rectal results and Gleason scores.

Similarly, to find the estimated odds ratio for White patients, we can look at the coefficient for the main effect of PSA (since White is the reference category for Ethnicity) in the output, which is 0.0593. So, exp(0.0593*10) = 1.78, which means that for White patients, a ten unit increase in PSA is associated with a 78% increase in the odds of tumor penetration, controlling for digital rectal results and Gleason scores.

To know more about p-value, here

brainly.com/question/30461126

#SPJ4

The required variance for the question is var (x - y) is 2.

For more such question on variance

https://brainly.com/question/9304306

#SPJ11