9x²+7x-2=0 find it's real root ​

There are 120 different ways to award the gold, silver, and bronze medals to the 10 women in the 100 meters race.

The number of ways that the gold, silver, and bronze medals can be awarded to 10 women is a combination problem.

We can use the formula for combinations to determine the number of ways to choose 3 women out of 10 for the medals:

\(nCr = n! / (r! * (n - r)!)\)

Where n is the total number of women (10) and r is the number of medals (3).

So, the number of ways to award the gold, silver, and bronze medals to the 10 women is:

\(10C3 = 10! / (3! * (10 - 3)!) = 120\)

Therefore, there are 120 different ways to award the gold, silver, and bronze medals to the 10 women in the 100 meters race.

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Answer:

Astronomers were trying to find the weight of six planets - Mars, Venus, Pluto, Jupiter, Mercury, and Saturn. The number of planets lighter than Mars was equal to the number of planets heavier than Venus. Saturn was heavier than Mars and Mercury were heavier than Pluto. Venus was lighter than Mars. Saturn was not the heaviest planet.

Step-by-step explanation:

Answer:

a) y = 11x

b) y = $660

Step-by-step explanation:

a) For 10 people is $110, so simply divide.

110/10 = $11 per person.

y = 11x

b) So using that, substitute 60 for x.

y = 11(60)

y = $660

The curve traced out by (x(t), y(t)) is a parabola. The sketch of the curve is a parabola symmetric about the y-axis. The equation of tangent line to the curve at t = 1 is given by y + 2x + 11 = 0.

Given, x(t) = -5t and y(t) = -t². To sketch the curve on interval -2 ≤ t ≤ 2, follow the steps below:

Plot the points by choosing different values of t. We get the following table.

Join all the points obtained in step 1 and we get the required curve.(Curve is symmetric about Y-axis as it is independent of positive and negative t values)

b) To find the equation of tangent line to the curve at t = 1,

differentiate x(t) and y(t) with respect to t and substitute t = 1.

x(t) = -5t

So, dx(t)/dt = -5

y(t) = -t²

So, dy(t)/dt = -2t

Equation of tangent at t = 1 is given by:

y - y(1) = m (x - x(1)) where, m = dy(t)/dt at t = 1 = -2 (

Substitute t = 1 in dy(t)/dt)and, (x(1), y(1)) is the point of contact at t = 1.

At t = 1, x(1) = -5 and y(1) = -1

Therefore, equation of tangent at t = 1 is:

y + 1 = -2 (x + 5)y + 2x + 11 = 0.

Hence, we have found the required equation of tangent line. Therefore, the sketch of the curve and the equation of tangent line are as follows:

Therefore, the curve traced out by (x(t), y(t)) is a parabola. The sketch of the curve is a parabola symmetric about the y-axis. The equation of tangent line to the curve at t = 1 is given by y + 2x + 11 = 0.

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The probability that X is greater than 145.28 is approximately 0.0465.

Given that X is normally distributed with mean (μ) of 110 and standard deviation (σ) of 21. We are to find the probability that X is greater than 145.28. It can be calculated as follows: We can calculate the Z-score value with the help of the following formula, Z = (X - μ) / σWhere X is the random variable value, μ is the mean, and σ is the standard deviation. Substituting the values in the formula, we get: Z = (145.28 - 110) / 21Z = 1.68476 Using the Z-table, we can find the probability that X is greater than 145.28 as follows: From the Z-table, we get: P(Z > 1.68) = 0.0465

Probability refers to potential. A random event's occurrence is the subject of this area of mathematics. The range of the value is 0 to 1. Mathematics has incorporated probability to forecast the likelihood of various events. The degree to which something is likely to happen is basically what probability means. You will understand the potential outcomes for a random experiment using this fundamental theory of probability, which is also applied to the probability distribution. Knowing the total number of outcomes is necessary before we can calculate the likelihood that a specific event will occur.

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If the stock of Company A lost $5. 31 throughout the day and ended at a value of $112. 69. The stock of Company A declined by 4.5% throughout the day.

The percentage decline in stock price is calculated by dividing the loss in value by the original value of the stock. To find out the percentage loss of stock A, we can use the formula:

(Loss in value / Original value) x 100%

Let us substitute the values we know:

Loss in value = $5.31

Original value = $118.00

Percent change = (5.31 / 118.00) x 100%

Percent change = 0.045 or 4.5%

Therefore, the stock of Company A declined by 4.5% throughout the day.

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Answer:

B

Step-by-step explanation:

x + 0.5 = 0.58 ? i think thats decimal but anyways

x = 0.58 - 0.5

x = 0.08 ?

sooo um

Answer:

B

Step-by-step explanation:

If I am incorrect in my reasoning, please let me know so that I can plan better for my future answers. Have an amazing day.

The value of Social Security Tax = $ 244.28 & Medicare tax = $ 57.13.

Social Security Tax = $ 244.28

Medicare tax = $ 57.13

Now, let us understand what social security tax is.

In the United States, Social Security is the commonly used term for the federal Old-Age, Survivors, and Disability Insurance (OASDI) program and is administered by the Social Security Administration (SSA). The original Social Security Act was enacted in 1935, and the current version of the Act, as amended, encompasses several social welfare and social insurance programs.

Social Security is nearly universal, with 94 percent of individuals in paid employment in the United States working in covered employment.

The current tax rate for social security is 6.2% for the employer and 6.2% for the employee, or 12.4% total. The current rate for Medicare is 1.45% for the employer and 1.45% for the employee, or 2.9% total.

Using this information, we can find the taxes.

Social Security tax = Gross Pay x 6.2%

= 3820 x 0.062 = $236.84

Medicare tax = Gross Pay x 1.45%

= 3820 x 0.0145 = $55.39

Hence, the Social Security tax that Sebastian Wayne has to pay is $236.84, and the Medicare tax he has to pay is $55.39 per month, after earning a gross pay of $3,820.

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1) Option B, which states that the confidence interval size shrank from 0.99 to 0.90, is the right answer.

2) Option D is the best decision. Confidence interval: 0.88

1) Confidence intervals are ranges of estimates for unknown parameters in frequentist statistics. Confidence intervals are given a confidence level. The most common level is 95%, but other levels, such as 90% or 99%, may be used as well.

Therefore, option B is the correct choice, which states that the confidence interval size decreased from 0.99 to 0.90

2) Probability is another word for confidence in statistics. An estimate that falls between the upper and lower values of a confidence interval, such as one constructed with a 95% level of confidence, is 95 out of 100 times likely to be accurate.

It can be calculated as:

df=n-1=19

t critical value 0.12 (two tail) = 1.62797

M = 51.5

sM = √(6.842 / 20) = 1.53

μ = M ± Z (sM)

μ = 51.5 ± 1.62797 * 1.53

μ = 51.5 ± 2.49

therefore, CI { 49.01 and 53.99 }

The correct choice is option D. 0.88 confidence interval.

. move the slider all the way to the right to a confidence coefficient of 0.99. now move the slider to a confidence coefficient of 0.90. what happened to the size of the confidence interval during the move from 0.99 to 0.90? from 0.99 to 0.90 the confidence interval size became larger from 0.99 to 0.90 the confidence interval size became smaller from 0.99 to 0.90 the confidence interval size remained constant -select- 2. what level of confidence would you need have so that the value of the true population mean of training time was between 49.01 and 53.99 days? 0.93 0.97 0.85 0.88

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Given data are the number of children in 20 families:2,1,2,3,1,3,4,2,4,1,3,2,3,2,3,1,3,2,0,2 Number of children Frequency 0 1 1 22 3 33 5 54 2 25 1 1

The above table shows the number of children and their frequency. The total number of children is 40, and the mean is calculated by:

Mean = Total number of children / Total number of families

Mean

= 40 / 20Mean = 2The mean of the data is 2.

The variance is calculated by the formula:

Variance = Σ(x - μ)² / n

Where,μ is the mean, x is the number of children, n is the total number of families and Σ is the sum from x = 1 to n

Variance = (2-2)² + (1-2)² + (2-2)² + (3-2)² + (1-2)² + (3-2)² + (4-2)² + (2-2)² + (4-2)² + (1-2)² + (3-2)² + (2-2)² + (3-2)² + (2-2)² + (3-2)² + (1-2)² + (3-2)² + (2-2)² + (0-2)² + (2-2)² / 20Variance

= 10 / 20Variance = 0.5

The variance of the data is 0.5.

The standard deviation is calculated by:

Standard deviation = √Variance Standard deviation

= √0.5Standard deviation

= 0.70710678118 or 0.71 approx

Hence, the number of children and frequency in the table form, mean, variance, and standard deviation of the data are as shown above.

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Step-by-step explanation:

x=3/2 it's the final result

Answer:

-5.5

Step-by-step explanation:

-10 - -6 = -4

2x+7 = -4

-4 - 7 = -11

2x = -11

x = -5.5

Answer:

The linear equation is y = 450 - 30 x, where y is the number of pages

Lourdes has left to read after x days

Step-by-step explanation:

Each day, Lourdes reads 30 pages of a 450-page book

- We need to write a linear equation to represent the number of pages

 Lourdes has left to read after x days

∵ Lourdes reads 30 pages each day

∵ Lourdes will read for x days

∴ The number of pages Lourdes will read in x day = 30 x

- The left pages will be the difference between the total pages of the

 book and the pages Lourdes read

∵ The book has 450 pages

∵ Loured will read 30 x in x days

∴ The number of pages left = 450 - 30 x

- Assume that y represents the number of pages Lourdes has left

 to read after x days

∴ y = 450 - 30 x

The linear equation is y = 450 - 30 x, where y is the number of

pages Lourdes has left to read after x days

Answer:

B

Step-by-step explanation:

Because Sandy have 9 more than henry, so +9. Henry have 3 time as Roger. Roger's CD is y. 3 times mean multiply by 3. So, 3y, but we have to subtract a y because it is asking how many Sandy have MORE than Roger, so 2y. Then add the 9 and it will be (2y+9) CD's that Sandy have more than Roger.

Answer:

0.04

Step-by-step explanation:

Answer:

(2, 3)

Step-by-step explanation:

Use substitution method

heres the answer for your question

Sparky needs to score at least 80 on his fourth Sociology test to maintain an average of 70 across all four tests.

To maintain an average of 70, Sparky needs to have a total score of at least 280 (70 x 4) on his four Sociology tests. His current total score is 200 (71 + 60 + 69), so he needs to score a minimum of 80 on his fourth test.

Alternatively, we can use the formula: (sum of scores)/(number of tests) = average score.

We can rearrange this formula to solve for the unknown variable (score on the fourth test):

(score on fourth test) = (average score) x (number of tests) - (sum of scores)

Substituting the values given, we get:

(score on fourth test) = 70 x 4 - (71 + 60 + 69) = 280 - 200 = 80

It's important to note that while Sparky only needs a minimum score of 80 on his fourth test to maintain his eligibility for lacrosse, it is always beneficial to aim for a higher score to improve his overall average and demonstrate mastery of the subject matter.

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won't let me type it so I did picture

The condition that is one of the assumptions of a valid multiple linear regression model is: the relationship between the dependent and independent variables is linear.

Condition that is one of the assumptions of a valid multiple linear regression model is that the relationship between the dependent and independent variables is linear. This means that the change in the dependent variable is proportional to the change in each independent variable, and there is no curved or nonlinear relationship between them. The assumption of linear independence of the independent variables is also important, meaning that they are not highly correlated with each other.

The assumption of constant residuals means that the errors in the model are consistent across all values of the independent variables. The assumption of a quadratic relationship between the dependent and independent variables is not appropriate for a multiple linear regression model.

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The definite integral evaluates to e, rounded to three decimal places.  e ≈ 2.718.

We can start by simplifying the integrand using algebraic manipulation.

First, we can rewrite the integrand as:

1 + E^(2x)ex = 1 + e^x * e^(x(2-1))

Next, we can use the substitution u = x(2-1) = x to simplify the integral.

Then, du/dx = 1 and dx = du.

Substituting these values, we get:

∫0ln(8)(1 + e^x * e^(x(2-1)))exdx

= ∫0^1 (1 + e^u)du

Now we can integrate this expression:

∫0^1 (1 + e^u)du = [u + e^u] from 0 to 1

= (1 + e) - (0 + 1)

= e

Therefore, the definite integral evaluates to e, rounded to three decimal places. Answer: e ≈ 2.718.

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The exponential function graphed is given as follows:

y = 2^x.

The standard definition of an exponential function is given as follows:

y = ab^x.

In which the parameters are given as follows:

When x increases by one, the output is multiplied by 2, hence the parameter b is given as follows:

b = 2.

The graph crosses the y-axis at y = 1, hence the parameter a is given as follows:

a = 1.

Hence the function is defined as follows:

y = 2^x.

The graph is given by the image presented at the end of the answer.

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The interest rate is 10.89%

1. Given,С = 200+ 0.69YI = 80 - 1,000rG = 20NX = 850.09ee = 90M = 115YL = 0.5Y - 200rY = 300Using the equation for National Saving, we get,National Saving = Investment + Government Saving + Net exports(S – I) + (T – G) + (X – M) = 0T = 0, hence (S – I) + (X – M) = 0(1 – t)Y – C – (I + G) + NX = 0Where t = 0, we get,0.5Y – 200r – 200 – 69/100Y + 80 – 850.09e = 0.5Y – 200r – 970.09e – 120 = 0.5Y – 200r – 970.09e – 120 = 0Therefore, Y = 325.0454 - 0.5r + 4.851eThis is the equation for the IS curve.On the other hand, the equation for the LM curve is given by,Ms / P = YL(i)115 / 1 = 0.5Y - 200rTherefore, Y = 400 + 400rThis is the equation for the LM curve.The interest rate is given by the point of intersection of the two curves. Equating Y from both equations, we get,325.0454 - 0.5r + 4.851e = 400 + 400rSolving the above equation for r, we get r = 0.1089 or 10.89%..

The size of the nominal money supply in the new short-run equilibrium is 121.07.

2. From the equilibrium found in Question (1), if the foreign interest rate increases by 0.05, the domestic output will change in two ways, depending on the flexibility of the nominal exchange rate.Flexible Exchange Rates:In this case, the nominal exchange rate will depreciate (e decreases). This will increase net exports and shift the IS curve to the right. The new equilibrium will be at a higher level of output.Real exchange rate will fall.Increase in output will be higher compared to the fixed exchange rate case.Fixed Exchange Rates:In this case, the nominal exchange rate will remain constant. Therefore, there will be no effect on net exports.IS curve will not shift.Real exchange rate will remain unchanged.Increase in output will be less compared to the flexible exchange rate case.The nominal money supply in the new short-run equilibrium will change in the case of Fixed Exchange Rates. In the fixed exchange rate case, the domestic interest rate will increase, leading to an inflow of capital. This will increase the money supply and the LM curve will shift downwards until it intersects the IS curve at the new equilibrium point.

Real exchange rate will remain unchanged.

3. From the equilibrium found in Question (1), if the foreign interest rate increases by 0.05, the domestic output will change in two ways, depending on the flexibility of the nominal exchange rate. Flexible Exchange Rates :In this case, the nominal exchange rate will depreciate (e decreases). This will increase net exports and shift the IS curve to the right. The new equilibrium will be at a higher level of output .Real exchange rate will fall. Value of the real exchange rate in the new equilibrium is 0.891.Fixed Exchange Rates: In this case, the nominal exchange rate will remain constant. Therefore, there will be no effect on net exports.IS curve will not shift.

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To compare the two quantities, divide the number of giraffes by the number of penguins There are 5 times as many giraffes as penguins at the zoo.

To compare the two quantities, you need to divide the number of giraffes by the number of penguins.

30 giraffes / 6 penguins = 5

This means that there are 5 times as many giraffes as penguins at the zoo.

There are 5 times as many giraffes as penguins at the zoo. To compare the two quantities, divide the number of giraffes by the number of penguins (30/6 = 5). This means that there are 5 times more giraffes than penguins at the zoo.

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Using a trigonometric relation we will see that the value of x is 81.2°

We can see that we have a right triangle, and the angle x is the one that is on the top vertex.

We can use any trigonometric relation to find the value of x, for example we can use:

sin(x) = (opposite cathetus)/(hypotenuse)

Where we can see that:

opposite cathetus = 84

hypotenuse = 85

Then we will get:

sin(x) = 84/85

x = Asin(84/85) = 81.2°

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After considering the given data and carefully evaluating the given circumstances we conclude that the satisfactory answer to the given question is Option D.

According to Certified Public Account (CPA) Canada, the agreed-upon and fulfillment system regarding the procedures report must comprises  identification and explanation of the various parties involved in the AUP engagement.
The report on an engagement places of applying agreed-upon procedures must have a statement of restrictions on the use of the report due to its cause of being used solely by the specified parties.

Hence, the answer is D) A disclaimer of responsibility for the sufficiency of these procedures.
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The complete question is
A CPA was engaged to calculate the rate of return on a specific investment according to an agreed-upon formula and verify that resultant percentage agrees to the percentage in an identified schedule. The CPA's report on these agreed-upon procedures should contain:

Multiple Choice

A) A disclaimer of opinion on the fair presentation of the financial statements.

B) An opinion about the fairness of the agreed-upon procedures,

C) A separate paragraph describing the effectiveness of the internal controls.

D) A disclaimer of responsibility for the sufficiency of these procedures.

The equation of the plane containing the two parallel lines v₁ = (0, 1, −8) t(6, 7, −5) and v₂ = (8, −1, 0) t(6, 7, −5) is 6x + 6y + 3z = 0.

What are parallel lines?

Parallel lines are coplanar infinite straight lines that do not intersect at any point in geometry. Parallel planes are planes that never meet in the same three-dimensional space. Parallel curves are those that do not touch or intersect and maintain a constant minimum distance.

To find an equation for the plane containing the two parallel lines v₁ = (0, 1, −8) t(6, 7, −5) and v₂ = (8, −1, 0) t(6, 7, −5),

We use the equation of a line: v = v₀ + tv₁

where v₀ and v₁ are points on the line and t is a real number.

Substitute the given points in for v₀ and v₁: v = (0, 1, −8) + t(6, 7, −5)

This equation of the plane is Ax + By + Cz = D, where A, B, C, and D are constants to be determined.

Equate the components:

0x + 1y - 8z = D....(1)

6x + 7y - 5z = D...(2)

Now, we subtract equation (1) from (2) and we get

6x - 0x + 7y - 1y - 5z + 8z = 0

6x + 6y + 3z = 0

Hence, the equation of the plane containing the two parallel lines v₁ = (0, 1, −8) t(6, 7, −5) and v₂ = (8, −1, 0) t(6, 7, −5) is 6x + 6y + 3z = 0.

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Answer:

Number 3 is 10

Step-by-step explanation:

16+13(10)=146

14(10)+6=146

Answer:

See answer below.

Step-by-step explanation:

# 3  x = number of boxes

     $16 + 13x = Tracy cost

     $6 + 14x = Brendan cost

     The costs are equal.  

    16 + 13x = 6 + 14x

     10 + 13x = 14x

      10 = x

#4   First plan                                                            second plan

      x = number of people at a table          x = number of people at a table

      y = number of people at a booths        y = number of people at a booths    

24x + 21y = 270       multiply by 23   ⇔   552x + 483y = 6210

 14x + 23y = 222      multiply by -21   ⇔ -294x  - 483y = -4662

                                                                   258x    =     1548

                                                                          x  = 6

Six people at each tables

 24 (6)  + 21y = 270                                      

   144 + 21y = 270

         21y = 126

            y = 6      

Answer: 6 people at each table; 6 people at each booth.