plzzzzzzzzzz helppppppppppppppppppp you get brainlest if right

4/5-1/4

ans (-3,0):(3,0)

I'm not sure but hope this helps

Given Function : f(x) = x² - 9

We can notice that : The function f(x) is zero for only two values of x and they are -3 and 3

⇒   f(-3) = (-3)² - 9 = (9 - 9) = 0

⇒   f(3) = (3² - 9) = (9 - 9) = 0

⇒   The ordered pairs of the zeroes : (-3 , 0) ; (3 , 0)

Answer:

120 degrees

Step-by-step explanation:

    If you look at the top left of the image, you can see angle A is 120 degrees. Then, if you look in the bottom left, you can see that angle H is 60 degrees. Since A and E are corresponding exterior angles, that means that overlap each other. So, since angle A is 120 degrees, so is angle E. Another way you can figure this out is by simply recognizing that a straight line is equal to 180 degrees. Since angles E and H form the straight line, you can simply subtract the 60 degrees, marked by angle H, from 180 degrees, the total measurement of the line, in order to get 120 degrees, which is angle E. I hope this helps!

Answer:
I believe it is Option C.

Step-by-step explanation:

There has only been one single tie since the passing of the 12th Amendment. It is a very low chance for a possible tie to take place, so they would have no reason to ensure it doesn't happen as it's already unlikely, ruling out option D. Giving two people the same rank would definitely make a difference as you are basically adding not 1, but two votes. Though it would even the count out, each person would gain 1 point, so it would make a difference. Option B is ruled out. This also potentially explains debunking A as there's no possible way to plan a tie to that extent. Again. ties happen very rarely, so it would be unlikely that voting for both candidates would impact the choice at all.

A student attempts a 10-question multiple-choice test where each question presents four options, and the student makes random guesses for each answer. So the probability of (a) P(5)= 0.058 and (b) P(More than 3)= 0.093.

Part 1: Calculation of probability of getting 5 questions correct

(a) P(5)The formula used to find the probability of getting a certain number of questions correct is:

P(k) = (nCk)pk(q(n−k))

Where, n = total number of questions

(10)k = number of questions that are answered correctly

p = probability of getting any question right = 1/4

q = probability of getting any question wrong = 3/4

P(5) = P(k = 5) = (10C5)(1/4)5(3/4)5= 252 × 0.0009765625 × 0.2373046875≈ 0.058

Part 2: Calculation of probability of getting more than 3 questions correct

(b) P(More than 3) = P(k > 3) = P(k = 4) + P(k = 5) + P(k = 6) + P(k = 7) + P(k = 8) + P(k = 9) + P(k = 10)

P(k = 4) = \(10\choose4\)(1/4)4(3/4)6 = 210 × 0.00390625 × 0.31640625 ≈ 0.02

P(k = 5) = \(10\choose5\)(1/4)5(3/4)5 = 252 × 0.0009765625 × 0.2373046875 ≈ 0.058

P(k = 6) = \(10\choose6\)(1/4)6(3/4)4 = 210 × 0.0002441406 × 0.31640625 ≈ 0.012

P(k = 7) = \(10\choose7\)(1/4)7(3/4)3 = 120 × 0.00006103516 × 0.421875 ≈ 0.002

P(k = 8) = \(10\choose8\)(1/4)8(3/4)2 = 45 × 0.00001525878 × 0.5625 ≈ 0.001

P(k = 9) = \(10\choose9\)(1/4)9(3/4)1 = 10 × 0.000003814697 × 0.75 ≈ 0.000

P(k = 10) = \(10\choose10\)(1/4)10(3/4)0 = 1 × 0.0000009536743 × 1 ≈ 0

P(More than 3) = 0.020 + 0.058 + 0.012 + 0.002 + 0.001 + 0.000 + 0≈ 0.093

Therefore, the probabilities of the given situations are: P(5) ≈ 0.058, P(More than 3) ≈ 0.093.

To know more about probability: https://brainly.com/question/251701

#SPJ11

Answer: 9 cents

Step-by-step explanation: 6.30 divided by 7 is 0.9

Answer:

2x + 2(x - 3)

Step-by-step explanation:

Answer:

3 * (x + 7)

Step-by-step explanation:

Mark number as x

Then the sum of a number and seven is x + 7

Three times x + 7 can be written as

3 * (x + 7)

Parentheses mean that we first add x and 7 and then multiply their sum by 3

Alternatively you can write it as 3x + 21, since

3 * (x + 7) = 3 * x + 3 * 7 = 3x + 21

Answer:

\(2\sqrt{3}+3\)

Step-by-step explanation:

\($\frac{3}{2 \sqrt 3 - 3}$\)

Rationalize the fraction.

\($\frac{3}{2 \sqrt 3 - 3}\cdot \frac{2 \sqrt 3 + 3}{2 \sqrt 3 + 3} =\frac{6\sqrt{3}+9 }{12-9} =\frac{6\sqrt{3}+9 }{3} =2\sqrt{3}+3 $\)

Note that I used the positive signal because we would have a difference of squares.

Answer:

1500 meters / second

Step-by-step explanation:

Speed = the magnitude of distance / time

Distance = 2,100 meters

Time = 1.4 seconds

Speed = 2,100 meters / 1.4 seconds = 1500 meters / second

Answer:

v=  π r2 h

Step-by-step explanation: the answer for ur question :)

If Ethan watches fewer than 6 movies per month, Plan A would be more expensive. If he watches more than 6 movies per month, Plan B would be more expensive.

For Plan A, the monthly cost is composed of a fixed fee of $28 plus a variable fee of $2.50 per movie watched. So, if Ethan watches x movies per month, the monthly cost for Plan A can be represented by the equation:

A = 28 + 2.5x

Here, A represents the monthly cost of Plan A, and x represents the number of movies Ethan watches per month.

For Plan B, the monthly cost is also composed of a fixed fee of $37, but the variable fee per movie watched is only $1. So, if Ethan watches x movies per month, the monthly cost for Plan B can be represented by the equation:

B = 37 + 1x

Again, B represents the monthly cost of Plan B, and x represents the number of movies Ethan watches per month.

To find the number of monthly movies watched, x, that would make the two plans have an equal monthly cost, we need to solve the equation:

A = B

So, we can substitute the equations for A and B to get:

28 + 2.5x = 37 + 1x

Now we can solve for x:

2.5x - 1x = 37 - 28

1.5x = 9

x = 6

So, if Ethan watches 6 movies per month, the monthly cost of Plan A and Plan B would be equal, at $41 per month.

To know more about equation here.

https://brainly.com/question/10413253

#SPJ4

Answer:

12.5 in²

Step-by-step explanation:

Answer:

1) a

2) c

3) a

Step-by-step explanation:

1) Subsitute

2.14x - 42.9 = ?

2.14(22.4) - 42.9 = ?

47.936 - 42.9 = ?

= 5.036

2) Factor out

6y^2 + 27y

both have 3 and y in common so ...

3y(2y + 9)  

3) Distribute

12m(m - 3n)

12m * m = 12m^2

12m * -3n = -36mn     the only reason -3 is NOT a positive is b/c it has subtraction sign b4 the number

put it in order:

12m^2 - 36mn

Answer:

Slope is 1/2

Step-by-step explanation:

Brainliest please!

The sd2 is 19.76 ( not listed ).

To find sd2 (the standard deviation squared) for the data set x1 = 18, x2 = 10, x3 = 7, x4 = 5, and x5 = 11, follow these steps:
1. Calculate the mean: (18 + 10 + 7 + 5 + 11) / 5 = 51 / 5 = 10.2
2. Calculate the squared deviations from the mean: (18 - 10.2)^2 = 60.84, (10 - 10.2)^2 = 0.04, (7 - 10.2)^2 = 10.24, (5 - 10.2)^2 = 27.04, (11 - 10.2)^2 = 0.64
3. Calculate the average of squared deviations: (60.84 + 0.04 + 10.24 + 27.04 + 0.64) / 5 = 98.8 / 5 = 19.76

The sd2 (standard deviation squared) for the given data set is 19.76, which is not listed among the given options (a. 15.1, b. 18.3, c. 20.2, d. 24.7).

Learn more about : standard deviation squared - https://brainly.com/question/31499696

#SPJ11

In circle A,  angle RAS is 74 degrees and  angle RTB is 28 degrees. The measure of minor arc BR is 81 degrees.

The figure is in the attached picture.

Notice that:

AS = AR = radii of the circle.

Hence, triangle SAR is an isosceles triangle, and ∠ASR = ∠ARS.

The sum of angles in a triangle is  180°.

Therefore,

∠ARS +  ∠ASR+ 74° =  180°

Since ∠ASR = ∠ARS,

2∠ARS + 74° =  180°

2∠ARS  = 106°

∠ARS  =  53°

and

∠ASR = ∠ARS = 53°

Angle in a straight line:

∠AST  + ∠ASR =  180°

∠AST   =  180° - ∠ASR =  180° - 53°  =  127°

Refer to triangle SAT:

∠SAT  =  180° - 28° - 127°  =  25°

The measure of minor arc BR = ∠RAB

∠RAB  =  180° - 74° - 25°  

∠RAB  =  81°

The picture in your question is missing, but most likely it was in the attached picture.

Learn more about arc angle here:

https://brainly.com/question/29046537

#SPJ4

Answer:

13.13

Step-by-step explanation:

39.39 ÷ 3

13.13

There is not a lot of work

Looking at it we can tell that 3 will go into 3 one time, and 3 will go into 9 three times because:

1 x 3 = 3

3 x 3 = 9

Answer:

13.13

Step-by-step explanation:

Answer:

Step-by-step explanation:

To find g[f(2)], we need to evaluate the composite function g[f(2)] by first finding f(2) and then substituting the result into g(x).

Let's start by finding f(2):

f(x) = 2x² - 3x

f(2) = 2(2)² - 3(2)

= 2(4) - 6

= 8 - 6

= 2

Now that we have the value of f(2) as 2, we can substitute it into g(x):

g(x) = 5x - 1

g[f(2)] = g(2)

= 5(2) - 1

= 10 - 1

= 9

Therefore, g[f(2)] is equal to 9.

Learn more about composite function here: brainly.com/question/30660139

#SPJ11

False. The expected cell frequency in statistical analysis, specifically in the context of contingency tables and chi-square tests, is not based on the researcher's opinion. Instead, it is determined through mathematical calculations and statistical assumptions.

In contingency tables, the expected cell frequency refers to the expected number of observations that would fall into a particular cell if the null hypothesis of independence is true (i.e., if there is no relationship between the variables being studied). The expected cell frequency is calculated based on the marginal totals (row totals and column totals) and the overall sample size.

The expected cell frequency is computed using statistical formulas and is not influenced by the researcher's opinion or subjective judgment. It is a crucial component in determining whether the observed frequencies in the cells significantly deviate from what would be expected under the null hypothesis.

By comparing the observed cell frequencies with the expected cell frequencies, statistical tests like the chi-square test can assess the association or independence between categorical variables in a data set.

Thus, the statement "the expected cell frequency is based on the researcher's opinion" is false. The expected cell frequency is derived through statistical calculations and is not subject to the researcher's subjective input.

To learn more about cell frequency

https://brainly.com/question/31994396

#SPJ11

The equation for the plane through p0(−1,1,9) perpendicular to the following line vector is, ( x , y , z ) = ( 0 , 0 , 10)

A quantity that has both magnitude and direction but not position. Examples of such quantities are velocity and acceleration.

Given that,

The equation for the plane through p0(−1,1,9)

The xy-plane has a normal vector of 〈0, 0, 1〉, and any plane parallel to it will have the same normal vector.

Then the equation of the plane through (-1, 1, 9) that is parallel to the xy-plane has equation

〈x - (-1), y - 1, z - 9〉 • 〈0, 0, 1〉 = 0

x + 1 = 0

y - 1 = 0

z - 9 = 1

z = 1 + 9

z = 10

Therefore,

The equation for the plane through p0(−1,1,9) perpendicular to the following line vector is, ( x , y , z ) = ( 0 , 0 , 10)

To learn more about Vector visit :

brainly.com/question/16856030

#SPJ4

Answer:

Answer is on the picture

Step-by-step explanation:

Answer is on the picture

Answer:

0.45

Step-by-step explanation:

Answer:

0.45

Step-by-step explanation:

5 ÷ 11  or 5.0 ÷ 11 = 0.45

Hope this helped!!! Pls mark me brainliest if you want more math answers like this! Also pls thank me!

Answer:

4 servings

Step-by-step explanation:

568 x 3 = 1704 ml

1704/380 ≈ 4.5

The discipline that studies the use of statistical tools to estimate economic models is Econometrics. An example of a resource constraint would be inadequate financial capital.

The reason firms do not continue to grow without limit can be attributed to various factors, including government regulation, antitrust laws, managerial limitations, and income taxes. So, all of the options mentioned can be relevant in restricting unlimited growth for firms.

According to the modern theory of the firm, firms behave in a way that is designed to maximize profit.

The functional area of business that has primary responsibility for a firm's total revenue is Marketing. Marketing activities are focused on promoting products or services, generating sales, and ultimately increasing a firm's revenue.

An example of a resource constraint would be inadequate financial capital. This means that a firm does not have enough financial resources to carry out its operations or expand its business activities due to limited capital availability.

Learn more about profit here:

https://brainly.com/question/21297845

#SPJ11

is it factorization ...

Using a t-distribution table or calculator, we get the t-score and are 98% positive that the interval (32.126, 53.874) includes the genuine population mean amount the medicine would drop a typical patient's systolic blood pressure to.

We must create a confidence interval for the population mean decrease in systolic blood pressure in order to calculate how much the medicine will reduce a typical patient's systolic blood pressure with a 98% confidence level.

CI = x t /2 * (s / n)

where x is the sample mean, s is the sample standard deviation, n is the sample size, t /2 is the t-score for the desired degree of confidence, and is the significance level (1 - confidence level).

With the supplied variables plugged in, we obtain:

CI = 43 t0.01/2 * (11 / 10)

The t-score at a 98% confidence level and 9 degrees of freedom (n-1) are roughly 2.821, according to a t-distribution table or calculator.

We obtain the following number by substituting it:

CI = 43 2.821 * (11 / 10) = (32.126, 53.874)

As a result, we have a 98% confidence that the interval (32.126, 53.874) contains the actual population mean amount that the medication would reduce the systolic blood pressure of an average patient.

The following requirements must be met for the interval to be valid:

1. The sample is a straightforward random sample taken from the population.

2. For the Central Limit Theorem to be applicable, either the population is normally distributed or the sample size is sufficient (n > 30).

3. A fair estimate of the population standard deviation is the sample standard deviation (which is assumed to be unknown).

Learn more about the t-distribution table at

brainly.com/question/30401218

#SPJ4

The correct option is (A) 60 as the estimated average number of shoppers in the original store at any time is 45.

To find the estimated average number of shoppers in the original store at any time:

Therefore, the correct option is (A) 60 as the estimated average number of shoppers in the original store at any time is 45.

Know more about averages here:

https://brainly.com/question/20118982

#SPJ4

The complete question is given below:
The owner of the Good Deals Store opens a new store across town. For the new store, the owner estimates that, during business hours, an average of 90 shoppers per hour enter the store and each of them stays an average of 12 minutes. The average number of shoppers in the new store at any time is what percent less than the average number of shoppers in the original store at any time?

(A) 60

(B) 70

(C) 80

(D) 50

Answer:

part A . 61.5$

Step-by-step explanation:

total amount = $2400+$385-$940

= 1845$

average change per day = 1845÷

30

answer is 61.5