Can someone help me???

Which of the following is equal to 1/2 or -1/2? Check all that apply.

Sin (7π/6)

Sin (4π/3)

Cos (5π/3)

Cos (π/6)

Cos (5π/6)

Sin (5π/6)

Answer:

Step-by-step explanation:

Total games:

Answer:

\(\ell=\frac{77}{4}\)

Step-by-step explanation:

Because these two cones are similar, we can set up the following proportion:

\(\frac{11}{4}=\frac{\ell}{7}\)

Solving, we get:

\(\ell=\frac{7\cdot11}{4},\\\ell=\fbox{$\frac{77}{4}$}\).

Answer:

Triangle=89.9 + 50.1 + 40(flat)= 140+40=180 and 180 is a straight angle ABC

                \           /

            89.9+50.1=140

The mean and standard deviation of the total time are µx = 66 and σx = 3.17, so the correct answer is (D) µx= 66 σx= 3.17.

To find this:

The total time to complete all three tasks is the sum of the time taken for each task. The mean time to complete all three tasks (µx) can be calculated by adding the mean time for each task: µx = 36 + 22 + 8 = 66. The standard deviation (σx) of the total time can be calculated using the standard deviation of each task and the square root of the number of tasks (n).

Using the formula: \(\sigma x = \frac{\sqrt{\sigma1^2 + \sigma2^2 + \sigma3^2}}{\sqrt n}\),

where σ1, σ2, σ3 are the standard deviations of each task, n = 3.

Plugging in the values, we get

\(\sigma x = \sqrt(2.5^2 + 1.8^2 + 0.75^2)/\sqrt3 \\= \sqrt{6.25 + 3.24 + 0.5625}/\sqrt3 \\= \sqrt{10.0525}/\sqrt3 = 3.17\)

Hence, the mean and standard deviation of the total time are µx = 66 and σx = 3.17, so the correct answer is (D) µx= 66 σx= 3.17.

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The term which is used for describing the number of voters who casted their votes using the ballots is called as voter turnout.

The process of selecting a candidate for a suitable post who takes care of the policies which will be framed for the people is called as voting. In this process, the members/ citizens casts their vote in the favor of their suitable candidate. Many times voters are not valid and their votes are considered as null and void.

The voter turnout is either the percentage of registered voters, eligible voters, or all voting-age people ( this varies from place to place depending upon the minimum voting age required). The voter turnout is also referred to the number of people who go to it or take part in it. High voter turnout is generally considered a sign of a healthy democracy.

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A. Probability Experiment F or G = {5, 6, 7, 8, 9, 10, 11, 12}

B. Probability Experiment F or G = {5, 6, 7, 8, 9, 10, 11, 12}

C. Probability Experiment P(F or G) = 8/12 = 0.667

The outcomes in F or G are the elements that are present in either F or G or both. Therefore, the list of outcomes in F or G is as follows:

F or G = {5, 6, 7, 8, 9, 10, 11, 12}

P(F or G), we count the number of outcomes in F or G and divide it by the total number of outcomes in the sample space.

Number of outcomes in F or G = 8

Total number of outcomes in the sample space = 12

P(F or G) = Number of outcomes in F or G / Total number of outcomes in the sample space

P(F or G) = 8/12 = 0.667 (rounded to three decimal places)

Using the general addition rule, we can express P(F or G) as the sum of the individual probabilities of events F and G minus the probability of their intersection.

P(F or G) = P(F) + P(G) - P(F and G)

P(F) = Number of outcomes in F / Total number of outcomes in the sample space = 5/12

P(G) = Number of outcomes in G / Total number of outcomes in the sample space = 4/12

P(F and G) = Number of outcomes in both F and G / Total number of outcomes in the sample space = 1/12

Substituting these values into the general addition rule:

P(F or G) = P(F) + P(G) - P(F and G) = 5/12 + 4/12 - 1/12 = 8/12 = 0.667 (rounded to three decimal places)

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The question is incomplete the complete question is :

A Probability Experiment Is Conducted In Which The Sample Space Of The Experiment Is S={ 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14}, Event F={5, 6, 7, 8, 9}​, And Event G={9, 10, 11, 12}. Assume That Each Outcome Is Equally Likely. List The Outcomes In F Or G. Find P(F Or G) By Counting The Number Of Outcomes In F Or G. Determine P(F Or G) Using The General

A probability experiment is conducted in which the sample space of the experiment is S={ 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14}, event F={5, 6, 7, 8, 9}​, and event G={9, 10, 11, 12}. Assume that each outcome is equally likely. List the outcomes in F or G. Find P(F or G) by counting the number of outcomes in F or G. Determine P(F or G) using the general addition rule.

List the outcomes in F or G. Select the correct choice below​and, if​ necessary, fill in the answer box to complete your choice.

A. F or G = { _____ }

​(Use a comma to separate answers as​ needed.)

B. F or G = { }

Find P(F or G) by counting the number of outcomes in F or G.

P(F or G) =________

​(Type an integer or a decimal rounded to three decimal places as​ needed.)

Determine P(F or G) using the general addition rule. Select the correct choice below and fill in any answer boxes within your choice.

​(Type the terms of your expression in the same order as they appear in the original expression. Round to three decimal places as​ needed.)

A. P(F or G)=_______+_______−________=_______

B. P(F or G)=_______+_______=________

The number of men using the gun is 8, using the given ratio of men to women as 2:1.

In the question, we are given that the ratio of men to women using a gun is 2:1, and a total of 24 people use a gun.

We are asked to find the number of men using the gun.

By the given ratio, we take the number of men using a gun to be 2x, whereas the number of women using a gun is x.

Thus, the total number of people using the gun = the number of men using a gun + the number of women using the gun,

or, the total number of people using the gun = 2x + x = 3x.

But, the total number of people using the gun is given to be 24.

Thus, we get an equation 3x = 24.

On solving this, we get:

3x = 24,

or, 3x/3 = 24/3,

or, x = 8.

Now, the number of men using a gun = 2x = 2*8 = 16.

The number of women using a gun = x = 8.

Thus, the number of men using the gun is 8, using the given ratio of men to women as 2:1.

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Answer:

Step-by-step explanation:

To solve this question we use ratio and proportion

From the question

1 hour = $11.90

Then 7.75 hours =

\( \frac{7.75 \times 11.9}{1} = 92.225\)

We have the final answer as

Hope this helps you

The measures of the following angles are:

∠6 = 124°,  ∠2 =124°,  ∠3 = 124° ∠5 = 56°,  ∠7 = 124° ∠1 = 56°

Corresponding angles are the angles which are formed in matching corners or corresponding corners with the transversal when two parallel lines are intersected by any other line (i.e. the transversal).

∠4 = 56° ( corresponding angles are equal)

∠1 =∠4 ( vertically opposite angles are equal)

∠1 = 56°

∠7 + 56° = 180 ( angles on a straight line sum up to 180°)

∠7 = 180 - 56

∠7 = 124°

∠7 = ∠6 ( vertically opposite angle are equal)

∠6 = 124°

∠3 = ∠6 ( alternate angles are equal)

∠3 = 124°

∠2 = ∠3 ( vertically opposite angle)

∠2 = 124°

∠5 = 56° ( vertically opposite angles)

The unknown angles are: ∠1 = 56° ∠2 = 124°, ∠3 = 124°, ∠4 = 56°, ∠5 = 56°, ∠6 = 124° ∠7 = 124°

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Considering the figure drawn using the formula given a = 40 cm

information given in the question

hypotenuse = 85 cm

opposite = 75 cm

adjacent =  a

The problem is solved using the Pythagoras theorem is applicable to right triangle.  the formula of the theorem is

hypotenuse² = opposite² + adjacent²

plugging the values as in the problem

let a be the required dimension

85² = 75² + a²

7225 = 5625 + a²

7225 - 5625  = a²

a² = 1600

a = √1600

x = 40

The adjacent of the right triangle is solved to be 40 cm

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The slope of the passing line through the origin is 112.5°.

The slope of a line is given as a tangent ratio.

In this case we have the angle, so the slope would be given as

      tan(7π/8).

Therefore,

The angle the line makes with the horizontal is given in radians here:

                     7π/8

In this degrees, we can use:

180° = π radians

1 radian = 180°/π

5π/8 radians = 5π/8 × 180° /π

                     =5π/8 × 180°/π

                     =112.5°

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Answer: D

Step-by-step explanation:

To get rid of denominator in x, multiply everything by 3

3y=2x+21

Move the variables to the left

-2x+3y=21

The three main types of spectra are continuous, absorption, and emission spectra. The formation of each of these types is as follows:

1) Continuous Spectrum:

A continuous spectrum is produced when a solid, liquid, or dense gas is heated. The emission of light from this heated object covers a broad range of colors, producing a continuous spectrum. When this spectrum is observed through a prism, it shows a continuous rainbow of colors.

2) Absorption Spectrum:

An absorption spectrum is produced when a source of white light is passed through a cool, low-density gas, and the gas absorbs the light at specific wavelengths, producing dark lines at those points. An absorption spectrum is unique to the chemical elements in the gas.

3) Emission Spectrum:

An emission spectrum is produced when a high-voltage electric current is passed through a gas, causing the gas to emit light at specific wavelengths. An emission spectrum is unique to the chemical elements in the gas.Here's a drawing that shows how all three types of spectra can be observed from an object:

\(\frac{}{}\)

The spectrum of the sun is an absorption spectrum because the sun's atmosphere contains a thin, cool layer of gas that absorbs certain wavelengths of light from the sun's interior, producing dark lines in the spectrum. These dark lines, also known as Fraunhofer lines, are produced when the light from the sun passes through the gas layer, and some of it is absorbed by the gas at specific wavelengths, leaving dark lines in the spectrum.

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The US economy was recovering in mid-2010 despite the unemployment rate remaining at 9.9 percent. This assessment was based on the increase in the labor force participation rate from 63 percent to 65.2 percent.

The labor force participation rate is the percentage of the working-age population that is either employed or actively seeking employment. An increase in this rate indicates that more people are entering or re-entering the labor market, which is seen as a positive sign for the economy.

Even though the unemployment rate remained the same, the higher labor force participation rate suggests that individuals were becoming more optimistic about their job prospects and actively looking for work. This increase in labor force participation indicates an improvement in labor market conditions and reflects growing confidence in the economy's ability to provide employment opportunities.

Therefore, economists considered the rise in labor force participation as a positive indicator of economic recovery, despite the unemployment rate remaining unchanged.

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Answer:

The quadratic formula is ax^2+bx+c=0.

The exact answer to this is v = 2 ± √ 3

Step-by-step explanation:

The number of seconds that will pass before the planes are at the same altitude is 52 seconds.

The altitude when they're at the same altitude is 3666 feet.

An altitude simply means a vertical measure from a particular reference point such as the sea level on Earth.

Let the number of seconds be represented by s

Plane A is at an altitude of 2613 feet and is gaining altitude at 20.25 feet per second. This will be represented as 2613 + 20.25s

Plane B is just taking off and is gaining altitude at 70.5. This will be 70.5s

Equate both equations

2613 + 20.25s = 70.5s

Collect like terms

70.5s - 20.25s = 2613

50.25s = 2613

Divide

s = 2613 / 50.25

s = 52

Number of seconds = 52 seconds

The altitude at this point will be:

= 70.5s

= 70.5 × 52

= 3666 feet

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Step-by-step explanation:

35 . 928    is already in decimals

Thirty five and nine hundred and twenty-eight thousandths can be written as :

35   928/1000     which reduces to 35  116/125  

The number obtained 9/4 is the reciprocal of the number 4/9.

For the given number.

Divide 1 by 4/9

This can be written as;

= 1/(4/9)

= 9/4

Then, the number obtained 9/4 is the reciprocal of the number 4/9.

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The present ages of the father and son are 36 and 9, respectively.

The sum of the ages of a father and son is 45 years. Five years ago, the product of their ages was four times the father's age at that time. To find the present ages of the father and son, we can set up a system of equations.

Let's denote the present ages of the father as "F" and the present age of the son as "S".

From the information given, we have two equations:

Equation 1: F + S = 45 (The sum of their ages is 45)
Equation 2: (F - 5)(S - 5) = 4(F - 5) (Five years ago, the product of their ages was four times the father's age at that time)

To solve this system of equations, we can use substitution or elimination method.

Let's solve it using the substitution method:

From Equation 1, we can express F in terms of S: F = 45 - S

Now, substitute F in Equation 2 with 45 - S:

(45 - S - 5)(S - 5) = 4(45 - S - 5)

Simplify the equation:

(40 - S)(S - 5) = 4(40 - S)

Expand and simplify:

40S - 5S - 200 + 25 = 160 - 4S

Combine like terms:

35S - 175 = 160 - 4S

Add 4S to both sides:

35S + 4S - 175 = 160

Combine like terms:

39S - 175 = 160

Add 175 to both sides:

39S = 335

Divide both sides by 39:

S = 335/39

Simplify:

S ≈ 8.59

Since age cannot be in decimal places, we can approximate the son's age to the nearest whole number:

S ≈ 9

Now, substitute S = 9 into Equation 1 to find the father's age:

F + 9 = 45

Subtract 9 from both sides:

F = 45 - 9

F = 36

Therefore, the present ages of the father and son are 36 and 9, respectively.

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Answer:

Step-by-step explanation:

We have the next information

48000 represent the 100%

8640 represent the ?

ANSWER

8640 represent the 18%

Answer:

B (15,9)

Step-by-step explanation:

There you go

Answer:

a

Step-by-step explanation:

- 6x + 2y = - 12 → (1)

6x + 5y = 117 → (2)

Add the 2 equations term by term to eliminate the x- term

0 + 7y = 105

7y = 105 ( divide both sides by 7 )

y = 15

Substitute y = 15 into either of the 2 equations and solve for x

Substituting into (2)

6x + 5(15) = 117

6x + 75 = 117 ( subtract 75 from both sides )

6x = 42 ( divide both sides by 6 )

x = 7

solution is (7, 15 ) → a

Answer:

3 ≤11 ≤ 11

Step-by-step explanation:

3x-4 = 2x +1

3x-5 = 2x

x-5 = 0

x= 5

3 ≤11 ≤ 11

Rights suppressed during McCarthy hearings: freedom of speech, right to privacy, right to due process, association freedom. Accuracy of names gathered during hearings: questionable due to lack of substantial evidence and reliance on hearsay and political motivations.

What rights and liberties were ignored or suppressed during the McCarthy hearings, and were the names of communist conspirators gathered during the hearings accurate?

During the McCarthy hearings, several rights and liberties were ignored or suppressed, including:

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The missing length in the right triangle is 12 m by pythagorean theorem

The pythagorean theorem can only be applied to right triangles

The longest side of a right triangle is called hypotenuse the other two sides are legs

You can use this theorem to find a missing length or to prove a triangle is right triangle

The missing length in the right triangle with hypotenuse is 13 m and adjacent side is 5m

13²=5²+x²

169=25+x²

144=x²

x=12 m

Hence, the missing length in the right triangle is 12 m

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Answer:

x=13,   x=1

Step-by-step explanation:

(x – 7)^2 = 36

Take the square root of each side

sqrt((x – 7)^2) = sqrt(36)

x-7 = ±6

Separate into two equations

x-7 = 6     x-7=-6

Add 7 to each side

x-7+7=6+7      x-7+7 = -6+7

x=13                  x=1

We are 95% confident that the proportion of all central Florida reefers who use LED lighting falls between .648 and .752.

The correct practical interpretation is: "We are 95% confident that the proportion of all central Florida reefers who use led lighting falls between .648 and .752."

This means that if we were to take multiple random samples of 700 experienced central Florida reefers, 95% of the intervals created would contain the true population proportion of reefers who use LED lighting.

So, based on this sample, we can say with 95% confidence that the true proportion of all central Florida reefers who use LED lighting is somewhere between .648 and .752.

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We are 95% confident that the proportion of all central Florida reefers who use LED lighting falls between .648 and .752 from mean.

The correct practical interpretation is: "We are 95% confident that the proportion of all central Florida reefers who use LED lighting falls between .648 and .752." This means that based on the sample of 700 experienced reefers, we can estimate with 95% confidence that the true proportion of all reefers in central Florida who use LED lighting is likely to be between .648 and .752.

This confidence interval was constructed using sampling techniques, and in repeated sampling, 95% of the intervals created would contain the population mean.
We are 95% confident that the proportion of all central Florida reefers who use LED lighting falls between .648 and .752.

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Answer:

(3x+4)(2x-5)

Step-by-step explanation:

You have 6x^2 - 7x-20, you add and take 8x so now you have

6x^2 - 7x +8x -8x -20 now you take 6x^2  and the +8x and factorize

6x^2 +8x = 2x( 3x +4 )

and you have -7x -8x-20 = -15x -20 factorize

-5(3x +4 ) add all up.

2x(3x +4) -5(3x +4) and you have

(3x+4)(2x-5)

Answer: 0.000032672

Step-by-step explanation: use long division or a calculator to solve.