Need answer how many hrs week=

Please

The solution of the equation are x = 8 , x = -4 + 4i√3 and x = -4 - 4i√3.

The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions. For instance, the equation 3x + 5 = 14 consists of the two equations 3x + 5 and 14, which are separated by the 'equal' sign.

An equation of the form ax³+bx²+cx+d=0 with a nonzero an is referred to as a cubic equation in one variable. The roots of the cubic function defined by this equation's left side are the answers to this equation.

The equation is given as

x³ = 512

⇒ x³ - 512 = 0

⇒x³ - 8³ = 0

⇒(x-8)(x² + 8x + 64) = 0

So, the solutions are

x = 8 and

x² + 8x + 64 = 0 .....(A)

Solving equation A we get,

x = [tex]\frac{-8 + \sqrt{8\x^{2} - 4*1*64} }{2} = \frac{-8 + \sqrt{64 - 256} }{2}[/tex] = -4 ± 4i√3

The solution of the equation are x = 8 , x = -4 + 4i√3 and x = -4 - 4i√3.

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Answer:

Q9:
[tex]\boxed{V = \dfrac{7}{96}\;cubic\;feet}}[/tex]

Q10

[tex]\boxed{V = \dfrac{64}{125}\;cubic\;yards}[/tex]

Step-by-step explanation:

For a rectangular prism, the volume = length x width x height

Given these 3 dimensions simply multiply them to get the volume

Q9

[tex]V = \dfrac{7}{8} \cdot \dfrac{2}{3} \cdot \dfrac{1}{8}\\\\[/tex]

[tex]V = \dfrac{7\cdot 2\cdot 1}{8\cdot 3 \cdot 8}\\\\V = \dfrac{14}{192}\\\\[/tex]

Divide numerator and denominator to reduce to lowest fraction

[tex]V = \dfrac{14 \div 2}{192\div 2}\\\\\boxed{V = \dfrac{7}{96}\;cubic\;feet}}[/tex]

Q10

This is a cube since each side is the same length

For a cube of side a, the volume = a³

So for this particular cube

[tex]V = \left(\dfrac{4}{5}\right)^3\\\\\\\boxed{V = \dfrac{64}{125}\;cubic\;yards}[/tex]

On solving -11 + 3(b + 5) = 7, we get the value of b = 1.

Solving an equation indicates finding the value of variables in a given expression that can satisfy the given condition in the equation.

To solve an equation we can add or subtract the same integer which cannot change the condition of the equation. Similarly, we can multiply or divide by the same integers on both sides.  

Here we have

Solve  -11 + 3(b + 5) = 7  

The given expression can be solved as follows

=> -11 + 3(b + 5) = 7  

Multiply 3 and (b + 5)

=> - 11 + 3b + 15 = 7

=> 3b + 4 = 7

Subtract 4 from both sides

=> 3b + 4 - 4 = 7 - 4

=> 3b = 3

Divide by 3 into both sides

=> 3b/3 = 3/3

=> b = 1

Therefore,

On solving -11 + 3(b + 5) = 7, we get the value of b = 1.

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Due to the fact that the two candidates were chosen at random, we may assume that all options are equally likely, hence each sample point has a chance of 1/6.

(a) The four candidates are marked as [tex]$A_1, A_2, A_3$[/tex], and M. The sample space is as follows because order doesn't matter (we just need two persons and it doesn't matter what order we choose):

[tex]$\mathcal{S}=\left\{A_1 A_2, A_1 A_3, A_1 M, A_2 A_3, A_2 M, A_3 M\right\}$[/tex]

(b) We may assume equally likely possibilities because the two candidates were selected at random, hence each sample point has a probability of 1 / 6

(c) Let  C = {minority hired} Then P(C) =

[tex]P\left(A_1 M\right)+P\left(A_2 M\right)+P\left(A_3 M\right)=3 / 6=1 / 2$[/tex]

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First, we translate b and place the tail at the tip of a, being careful to draw a copy of b that has the same length and direction. then we draw the vector a+b (see the middle figure) starting at the initial point of a and ending at the terminal point of the copy of b.

Alternatively, we could place b so it starts where a start and construct a+b by the parallelogram law as in the bottom figure.

The parallelogram law says that if we place two vectors so they have the same initial point, and then complete the vectors into a parallelogram, then the sum of the vectors is the directed diagonal that initiates at the same point as the vectors.

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It is a sample size proportion. 0.16 is the proportion of the 1,000 college students that reported using Ecstasy, which is a measure of the sample.

The number 0.16 is a sample proportion. This means that it is the proportion of the sample of 1,000 college students that reported using the drug Ecstasy. A sample proportion is a measure of the sample, not of the population. It is not a randomly chosen number and it is not a margin of error. A margin of error is a measure of how accurate a sample statistic is likely to be, usually expressed as a percentage or a number of standard deviations. A population proportion is the proportion of the total population that holds a certain characteristic or has had a certain experience. Thus, 0.16 is a sample proportion and not a population proportion, margin of error, or randomly chosen number

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Answer: 272 miles

Step-by-step explanation:

The scale factor is [tex]\frac{816}{1.5}=544[/tex] inches per mile.

So, the distance from Chicago to STL is [tex]544(0.5)=272[/tex] miles.

These events would be considered as: Subjective, Independent, Dependent, Classical

Subjective event: An event that is based on individual opinion or belief. This event would not be represented by a formula or calculation.

Independent event: An event that is not influenced by other events. This event can be represented by a formula such as P(A) = P(A) which calculates the probability of an event occurring on its own.

Dependent event: An event that is influenced by other events. This event can be represented by a formula such as P(A|B) = P(A ∩ B) / P(B) which calculates the probability of an event occurring given that another event has already occurred.

Classical event: An event that is determined by predetermined probabilities or odds. This event can be represented by a formula such as P(A) = n(A) / n(S) which calculates the probability of an event occurring based on the number of favorable outcomes divided by the total number of outcomes.

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Answer: (-1, 5)

Step-by-step explanation:   I wrote down all the explanations refer to the image please

The equation to find all x in the given matrix that are mapped into the zero vector by the transformation is ax = 0, where a is the matrix. Solving this equation yields the solutions for the x values that map to the zero vector.

In order to find all x in the given matrix that are mapped into the zero vector by the transformation, we have to solve the equation ax = 0. Here, a is the matrix we are given. This equation is a system of linear equations, and can be solved using various methods, such as Gaussian elimination, matrix inversion, or Cramer's rule. Once the equation is solved, we can obtain the solutions for the x values that map to the zero vector. For example, if we are given the matrix A = [[1, 2], [3, 4]], then the equation to solve is 1x + 2y = 0, 3x + 4y = 0. Solving this equation yields the solutions x = 2, y = -1. Therefore, the x values that are mapped into the zero vector by the transformation are (2, -1).

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a) Both events occur: A ∩ B

b) At least one event occurs: A ∪ B

c) Neither event occurs: A' ∩ B'

d) Exactly one event occurs: (A ∩ B') ∪ (A' ∩ B)

In Event A and B, the intersection A ∩ B tells us the outcome where both events occur. The Union of A and B tells us the outcome where at least one event occurs. The intersection of the complements of A and B (A' ∩ B') tells us the outcome where neither event occurs.

Finally, the union of the intersection of A and the complement of B and the intersection of the complement of A and B ( (A ∩ B') ∪ (A' ∩ B) ) tells us the outcome where exactly one event occurs.

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A circle is formed by all points on a plane equidistant from a given point

The possible x-coordinates of Q are -134.71 and +134.71

Known parameters are;

The radius of the golf course, r = 30 feet

Point the ball exits the green = The right-most edge

Speed of the ball = 8 ft./sec

Location of the cup = The origin (0, 0)

Location the ball starts = (-40. -50)

Required:

To find the possible x-coordinates of Q, the point where the line L parallel to the path of the ball is tangent to the circle

The coordinates of the rightmost edge of the golf course = (30, 0)

[tex]slope,m=\frac{y_{2}-y_{1} }{x_{2} -x_{1} }[/tex]

the slope of the path: [tex]m=\frac{-50-0}{-40-30}[/tex]

m=-50/-70

m=5/7

The equation of a circle is (x - h)² + (y - k)² = r²

The center of the circular green, (h, k) = (0, 0)

The equation of the given circle is (x - 0)² + (y - 0)² = x² + y² = 30²

the slope of the radius at the tangent Point [tex]m_{r} =-\frac{1}{m}[/tex]

The equation of the radius at a tangent point is therefore;

[tex]y=-\frac{7}{5} .x[/tex]

Which gives the equation of the circle as follows;

[tex]x^{2} +(-\frac{7}{5} .x)^2=30^2\\\\\frac{31.x^2}{25} =30^2\\\\x=\frac{\sqrt{30^2*25} }{31} \\\\x=\frac{750}{31}*\sqrt{31}[/tex]

x=±134.70

The possible x-coordinates of point Q are -134.70 and +134.70

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The required sets of all real and satisfying numbers are:

(-∞ ,  -4) ,  (-4, -2), (-2, - 1), (-1, 1), and (1, ∞)

Sets are groups of clearly defined objects or elements in mathematics.

A set is denoted by a capital letter, and the cardinal number of a set is enclosed in a curly bracket to indicate how many members there are in a finite set.

The empty set, finite set, singleton set, equivalent set, subset, power set, universal set, superset, and infinite set are the various types of sets.

Now, solve for (x^2 + 3x - 1)^2  = 9:

To make this true, either

x^2 + 3x - 1  =  3  or x^2 + 3x - 1  =  -3

x^2 + 3x - 4  = 0, x^2 + 3x + 2  = 0

(x + 4) ( x - 1)  = 0, (x + 1) ( x + 2)  = 0

x = -4, x= 1, x = -1, x = -2

Therefore, we have five potential intervals to test.

(-∞ ,  -4) ,  (-4, -2), (-2, - 1), (-1, 1), and (1, ∞)

Therefore, the required sets of all real and satisfying numbers are:

(-∞ ,  -4) ,  (-4, -2), (-2, - 1), (-1, 1), and (1, ∞)

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[tex]\bold{n + (n+1)^{2}}[/tex]

An unknown number can be interpreted with any letter of the alphabet, they will be our unknowns to be able to form an algebraic expression.

Well, in this case, I will use the variable n, to name the unknown number.

Let "n" be the number, the square of it is; n² and the following number results from adding the unit; then (n + 1) will be the next of the number.

(grouping the data the following algebraic expression is obtained):

[tex]\bold{n + (n+1)^{2}}[/tex]

Answer:

(n + 1 )

Let "n" be the number, the square of it is; n² and the following number results from adding the unit; then (n + 1) will be the next of the number.

The triangle ABC is shown in the figure below. All 3 sides of the triangle are labeled a, b, and c, and the right angle is located at the vertex C.

To verify that the triangle ABC is a right triangle, we can use the Pythagorean theorem. The Pythagorean theorem states that the sum of the squares of the two shorter sides of the right triangle is equal to the square of the longest side (hypotenuse). Therefore, in the case of triangle ABC, we can calculate a^2 + b^2 = c^2. When we calculate, we can see that the equation is true, meaning that the triangle ABC is indeed a right triangle.

To find the area of triangle ABC, we can use Heron's formula. Heron's formula states that the area of a triangle is equal to the square root of s(s-a)(s-b)(s-c), where s is the semiperimeter (the sum of the three sides divided by 2). Therefore, in the case of triangle ABC, the area is equal to the square root of s(s-a)(s-b)(s-c), which is equal to 6.

Therefore, triangle ABC is a right triangle with an area of 6.

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The solution set is {x | x < -35/2} and {x | x > -40/7}.

To find the solution set of these two inequalities, first we need to solve them.

The first inequality is x < -40/7. To solve this inequality, we need to divide both sides of the inequality by -7. This gives us x > -40/7.

The second inequality is x > -35/2. To solve this inequality, we need to divide both sides of the inequality by 2. This gives us x < -35/2.

Therefore, the solution set is {x | x < -35/2} and {x | x > -40/7}.

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The correct expression is a) [tex]x^2-6x+9[/tex].

What is expression?

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation. Unknown variables, integers, and arithmetic operators are the components of an algebraic expression. There are no symbols for equality or inequality in it.

Here the given expression is ,

=> [tex](x-3)^2[/tex]

Now using formula [tex](a-b)^2=a^2-2ab+b^2[/tex] then

=> [tex]x^2-2.x.3+3^2[/tex]

=> [tex]x^2-6x+9[/tex]

Hence the correct answer is a) [tex]x^2-6x+9[/tex].

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Answer:

  65,900 mL

Step-by-step explanation:

You want to know the volume in mL of a sink with a volume of 65.9 dm³.

The relation between dm³ and mL is ...

  1 dm³ = 1000 mL . . . . . . . . . . also, 1 L (liter)

Multiplying the above relation by 65.9, we have ...

  65.9 dm³ = 65,900 mL

__

Additional comment

For many problems involving volumes in liters and dimensions in centimeters or meters, it can be convenient to convert the dimensions to decimeters (dm). Since 1 dm³ = 1 L, that can make the desired volume easily calculated.

Answer:

Step-by-step explanation:

5800 divided by 100=58x4.6=126 something like that

Answer:

With work shown...

Answer: 2^23 + 12 / 2

Step-by-step explanation:

WORK:

(1) -A negative base raised to an odd power equals a negative.

4^7 x (-8^3) + 12 / 2

(2) -Multiplying two negatives equals a positive: (-) x (-) = (+)

2^14 x 2^9 + 12 / 2

(3) -Calculate the product

2^23 + 12 / 2

The solution is located at the top.

Hope this helped <3

The method of moments estimate and the maximum likelihood estimate are the same.

The method of moments estimate is the sample mean, which can be calculated by adding the numbers together and dividing by 5. In this example, the mean is 52. The maximum likelihood estimate is the mean of the population distribution, which can be estimated by maximizing the likelihood function. This involves taking the partial derivatives with respect to the parameters and solving for the values that make the derivative equal to zero. In this example, the maximum likelihood estimate will also be 52. Thus, the method of moments estimate and the maximum likelihood estimate are the same.

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Answer:

Step-by-step explanation:

=42+\frac{8}{9}\left(-\frac{1}{2}\right)

=42+\frac{8}{9}\left(-\frac{1}{2}\right)=42+\frac{8}{9}\left(-\frac{1}{2}\right)

Answer:

Step-by-step explanation:

The inverse function of the function f(x) will be f⁻¹(x) = 36x² + 2. Then the correct option is A.

Let the function f is given as

y = m(x + a) + c

Then the inverse function of the function f will be given by swapping x with y and y with x.

The function is given below.

f(x) = √(x - 2) / 6

Replace x with y and f(x) with x. Then the inverse function is given as,

x = √(y - 2) / 6

6x = √(y - 2)

36x² = y - 2

y = 36x² + 2

f⁻¹(x) = 36x² + 2

The inverse function of the function f(x) will be f⁻¹(x) = 36x² + 2. Then the correct option is A.

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The complete question is given below.

The basis for the nullspace of A is {(-1, -1, 1)}.

Let A be the given matrix. The nullspace of A is the set of all vectors x such that Ax = 0. To find a basis for the nullspace of A, we need to solve the following system of equations:

Ax = 0

Since A is a 2x3 matrix, we must have 3 variables and 2 equations. We can solve this system of equations by using Gaussian elimination. We start by subtracting the first equation from the second equation and then eliminating the middle variable by subtracting the first equation from the third equation. This gives us the following:

x1 + x3 = 0

x2 + x3 = 0

We solve this system of equations by setting x1 = -x3 and x2 = -x3. This gives us the basis for the nullspace of A as {(-1, -1, 1)}. Thus, the basis for the nullspace of A is {(-1, -1, 1)}.

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The dot plot consists of ten dots, each representing the data value of a single person at the talk. The data values are spread out as far as possible, resulting in the largest possible standard deviation.

A dot plot is a graph that is used to represent the distribution of data. It consists of dots, each of which represents a single data value. In this case, the dot plot represents the distribution of possible data values from a talk with ten people. To achieve the largest possible standard deviation, the data points should be spread out as far as possible. Each dot should be placed on the graph in such a way that the difference between any two adjacent data points is maximized. This is done by placing the highest and lowest values at opposite ends of the graph, and then evenly spacing out the remaining data points in between. All of this should result in the largest possible standard deviation of the data set.

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Answer:

Solution in attached photo.

Step-by-step explanation:

To expand the brackets, we will use the rainbow expansion method.

Number of 7 students have both a dog and a cat, out of the 39 eighth grade students at Lincoln Middle School.

Total number of 8th grade students: 39

Number of students with a dog: 20

Number of students with a cat: 26

Number of students with both a dog and a cat: 20 + 26 - 39 = 7. Therefore, 7 have both a dog and a cat.

There are 39 students in the 8th grade at Lincoln Middle School. Of those students, 20 have a dog, 26 have a cat, and 7 have both a dog and a cat. To calculate this number, we added the number of students with a dog (20) and the number of students with a cat (26) and then subtracted the total number of students (39). The result of this calculation, 7, is the number of students who have both a dog and a cat. This means that 7 out of 39 8th grade students at Lincoln Middle School have a dog and a cat.

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The value of the missing number will be 3.

A number line in elementary mathematics is a representation of a graduated straight line that serves as an abstraction for real numbers, represented by the symbol R."

It is assumed that every point on a number line corresponds to a real number and that every real number corresponds to a point.

The equation for the missing number is given as x + (-4) = -1. the missing number will be calculated as:-

x + (-4) = -1

x -4 = -1

x = 4 - 1

x = 3

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36.714 x 98.77 = 3627.7198

36.714 + 98.77 = 135.484 (4 decimal places)

The degree measure of angle BCD is 130.

What is the measure of angle?

An angle measure in geometry is the length of the angle created by two rays or arms meeting at a common vertex.

Here, we have

Given:  the diameter EB is parallel to DC, and AB is parallel to ED. The angles AEB and ABE are in the ratio 4: 5.

We can let  ∠AEB be 4x and  ∠ABE be 5x because they are in the ratio 4: 5.

When an inscribed angle contains the diameter, the inscribed angle is a right angle. Therefore by the triangle sum theorem,

= 4x+5x+90 = 180

x = 10 and

∠ABE = 50.

∠ABE =∠BED because they are alternate interior angles and AB||ED.

Opposite angles in a cyclic quadrilateral are supplementary,

so ∠BED + ∠BCD = 180

Use substitution to get ∠ABE + ∠BCD = 180

50 + ∠BCD = 180

∠BCD = 130

Hence, the degree measure of angle BCD is 130.

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