I need help i don't get it.​

Answer:

0.13

Step-by-step explanation:

because you have to round up when the fourth number is from 0-4 it stays the same but when its from 5- and up it goes up one

Answer:

7

Step-by-step explanation: please mark brainliest

(5*7)-11=24

Answer:s^2-25

Step-by-step explanation:

Answer:

you would have to multiply so,

s*s is s^2

s*-5 is -5s

s*5 is 5s

5*-5 is -25

the final answer would be s^2-25 (-5s and 5s cancel each other out)

hope this helped!!

Answer:

To ensure that her team will act immediately, Diana should say the message is very important, or urgent.

Step-by-step explanation:

PLEASE MARK ME AS BRAINLIEST I REALLY WANT TO LEVEL UP

Have a blessed day and remember to keep smiling! :)

Answer:

C

Step-by-step explanation:

A- Have no effect on the regression results.

Adding an irrelevant variable to a regression analysis, also known as a "nuisance variable" or "noise variable," is not expected to have a substantial effect on the regression results. The coefficient estimates for the relevant variables and the overall fit of the model should remain largely unchanged.

Including an irrelevant variable may slightly increase the complexity of the regression model, which can lead to a decrease in the precision of coefficient estimates. However, it does not necessarily introduce bias or impact the overall interpretation of the relevant variables.

the most appropriate answer is A - Adding an irrelevant variable to a regression will have no effect on the regression results.

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The prοbability that the prοpοrtiοn οf red marbles in the sample frοm bin a is greater than the prοpοrtiοn οf red marbles frοm bin b is 0.1573.

Prοbability is a way οf calculating hοw likely sοmething is tο happen. It is difficult tο prοvide a cοmplete predictiοn fοr many events. Using it, we can οnly fοrecast the prοbability, οr likelihοοd, οf an event οccurring. The prοbability might be between 0 and 1, where 0 denοtes an impοssibility and 1 denοtes a certainty.

Here by using probability calculator for sampling distribution of \(p_1-p_2\).

\(z=\frac{\hat p_1-\hat p_2}{\sqrt{\frac{p_1(1-p_1)}{n_1}+\frac{p_2(1-p_2)}{n_2}}}\)

Here \(\hat p_1=p_1\) = 40% = 0.40 and \(\hat {p_2}=p_2\) = 52% = 0.52 and \(n_1=0 , n_2=40\)

=> \(z=\frac{0.40-0.52}{\sqrt{\frac{0.40(1-0.40)}{0}+\frac{0.52(1-0.52)}{40}}}\)

=> z = -1.00561

Here \(\hat p_1 > \hat p_2\)

=> \(\hat p_1 - \hat p_2 > 0\)

Then , P(x<z) = 0.1573.

Hence  the prοbability that the prοpοrtiοn οf red marbles in the sample frοm bin a is greater than the prοpοrtiοn οf red marbles frοm bin b is 0.1573.

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Answer:

D^2 = (x^2 + y^2) + z^2

and taking derivative of each term with respect to t or time, therefore:

2*D*dD/dt  =  2*x*dx/dt  + 2*y*dy/dt  + 0 (since z is constant)

divide by 2 on both sides,

D*dD/dt = x*dx/dt + y*dy/dt

Need to solve for D at t =0,  x (at t = 0) = 10 km,  y (at t = 0) = 15 km

at t =0,

D^2 =  c^2 + z^2 = (x^2 + y^2) + z^2  =  10^2 + 15^2 + 2^2  = 100 + 225 + 4  = 329

D = sqrt(329)

Therefore solving for dD/dt, which is the distance rate between the car and plane at t = 0

dD/dt = (x*dx/dt + y*dy/dt)/D  =  (10*190 + 15*60)/sqrt(329)  = (1900 + 900)/sqrt(329)

= 2800/sqrt(329) = 154.4 km/hr

154.4 km/hr

Step-by-step explanation:

To determine the number of solutions for the given linear system, we can analyze the consistency of the system by performing row operations on the augmented matrix. If we end up with a row of zeros on the left side and a nonzero number on the right side, the system is inconsistent and has no solution. If we end up with a row of zeros on the left side and a zero on the right side, the system has infinitely many solutions. If we don't encounter these cases, the system has a unique solution.

Let's represent the given linear system in augmented matrix form:

[  2   9   7  | -9 ]

[ -6   1  -3  | -5 ]

Perform row operations to simplify the augmented matrix. Apply row operations to eliminate the coefficients below the pivot in each row. Use Gaussian elimination or any other row reduction method. After performing the row operations, we obtain the row-echelon form or reduced row-echelon form of the matrix.

Analyze the row-echelon form: If we end up with a row of zeros on the left side and a nonzero number on the right side, the system is inconsistent and has no solution. If we end up with a row of zeros on the left side and a zero on the right side, the system has infinitely many solutions. If neither of these cases occurs, the system has a unique solution.

The augmented matrix representing the system is:

[  2   9   7  | -9 ]

[ -6   1  -3  | -5 ]

Performing row operations, we can simplify the matrix.

[  1   4.5  3.5 | -4.5 ]

[  0   1   -1/2 | 1/2  ]

Since we have a row of zeros on the left side and a nonzero number (1/2) on the right side, the system is inconsistent and has no solution. Therefore, the correct answer is option A: 0 solutions. By examining the row-echelon form, we can conclude that the given linear system does not have a solution that satisfies all the equations simultaneously.

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Answer:

\((a)\ x = 3y - 2\)

\((b)\ y = -3x - 2\)

\((e)\ 3y - x = -2\)

Step-by-step explanation:

Given

\(y =3x -2\)

Required

Equations that can create consistent and independent systems

For a pair of equation to have consistent and independent systems, the equations must have different slopes.

An equation of the form \(y = mx + c\) has m has its slope.

In \(y =3x -2\)

\(m = 3\) --- slope

Considering the options

\((a)\ x = 3y - 2\)

Make y the subject

\(x = 3y - 2\)

\(3y = x+2\)

Divide by 3

\(y = \frac{1}{3}x+\frac{2}{3}\)

The slope is:

\(m_1 = \frac{1}{3}\)

Hence, (a) can make a consistent and independent system with \(y =3x -2\)

\((b)\ y = -3x - 2\)

The slope is:

\(m= -3\)

Hence, (b) can make a consistent and independent system with \(y =3x -2\)

\((c)\ y = 3x + 2\)

The slope is:

\(m=3\)

Hence, (c) cannot make a consistent and independent system with \(y =3x -2\)

\((d)\ 6x - 2y = 4\)

Make y the subject

\(2y = 6x -4\)

Divide by 2

\(y = 3x -2\)

The slope is

\(m =3\)

Hence, (d) cannot make a consistent and independent system with \(y =3x -2\)

\((e)\ 3y - x = -2\)

Make y the subject

\(3y = x -2\)

Divide by 3

\(y = \frac{1}{3}x -\frac{2}{3}\)

The slope is:

\(m = \frac{1}{3}\)

Hence, (e) can make a consistent and independent system with \(y =3x -2\)

Answer/Step-by-step explanation:

5.)

Square = 2

Triangle = 3

Circle = 3

Star = 4

2(circle) + 2(triangle) = 12

12 ÷ 4 = 3

2(3) + 2(3) = 12

2(triangle) + 2(square) = 10

2(3) + 2(square) = 10

6 + 2(square) = 10

-6                      -6

2(square) = 4

÷2              ÷2

Square = 2

(circle) + (star) + 2(square) = 11

(3) + (star) + 2(2) = 11

3 + (star) + 4 = 11

7 + (star) = 11

-7               -7

Star = 4

6.)

Circle = 3

Star = 5

Triangle = 4

4(star) = 20

÷4          ÷4

(star) = 5

(star) + 3(circle) = 14

5 + 3(circle) = 14

-5                    -5

3(circle) = 9

÷3            ÷3

circle = 3

2(triangle) + (circle) + (star) = 16

2(triangle) + 3 + 5 = 16

2(triangle) + 8 = 16

                   -8    -8

2(triangle) = 8

÷2              ÷2

triangle = 4

I hope this helps!

Answer:

Since the calculated value exceeds the critical value;

we Reject Null hypothesis.

We conclude that, there is no sufficient evidence that The percentage of people who believe they voted for winning candidate is equals to 43% or 0.43

Step-by-step explanation:

Given the data in the question;

308 out of 611 voters are surveyed saying they voted for the candidate that won.

that is;

x = 308

sample size n = 611

Hypothesis;

Null hypothesis            H₀ : p = 43% or 0.43 { The % of people who believe they voted for winning candidate equals 43% }

Alternative hypothesis H₁ : p ≠ 43% or 0.43 { The % of people who believe they voted for winning candidate is not equal to 43% }

Sample proportion p" = x / n = 308 / 611 = 0.504

level of significance ∝ = 0.05

Critical value of Z = \(Z_{\alpha /2\) =  1.96

Test Statistics

z = (p" - p) / √( p(1-p) / n )

we substitute

z = (0.504 - 0.43) / √( 0.43(1-0.43) / 611 )

z = 0.074 / √( 0.2451 / 611 )

z = 0.074 / 0.02

z = 3.7

We compare;

Since the calculated value is exceeds the critical value;

we Reject Null hypothesis.

We conclude that, there is no sufficient evidence that The percentage of people who believe they voted for winning candidate is equals to 43% or 0.43

Combine like terms.

6x + 5z + 4

Answer:

f(x)=X^2+4

f(x)=42

42=X^2+4

X^2+4=42

X^2=42-4

X^2=38

X=sqrt(38)=6.16

\( \sqrt{?} \)

Answer:

A. They can be searched using keywords.

To solve this problem, we can use the grating equation:

m * λ = d * sin(θ)

Where:

m is the order of the fringe

λ is the wavelength of light

d is the slit spacing (distance between adjacent slits)

θ is the angle of the fringe

In this case, we're given:

m = 3 (third-order fringe)

θ = 24.0°

We need to calculate the slit spacing (d) using the information that the grating has 3200 slits per cm. First, we convert the number of slits per cm to the slit spacing in meters:

slits per cm = 3200

slits per m = 3200 * 100 = 320,000

Now we can calculate the slit spacing (d):

d = 1 / (slits per m)

d = 1 / 320,000

Now, let's substitute the given values into the grating equation and solve for λ (wavelength):

m * λ = d * sin(θ)

3 * λ = (1 / 320,000) * sin(24.0°)

λ = (1 / (3 * 320,000)) * sin(24.0°)

Using a calculator, we can calculate the value of λ:

λ ≈ 5.79 × 10^(-7) meters or 579 nm

Therefore, the wavelength of light for which the grating with 3200 slits per cm produces a third-order fringe at a 24.0° angle is approximately 579 nm.

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Answer:

-4

Step-by-step explanation:

The roots are 7 and -3, so the factored version is (x - 7) (x + 3)

Foil them and you get x^2 - 4x - 21

Nastya's annual payments on the loan will be approximately $7,350.68 (rounded to the nearest cent).

To find Jean's equity as a percent of the house value, we need to calculate the equity and divide it by the house value, then multiply by 100 to get the percentage.

Jean's equity is the difference between the house value and the mortgage amount. So, the equity is $792078.31 - $600,000 = $192,078.31.

To calculate the percentage, we divide the equity by the house value and multiply by 100: ($192,078.31 / $792078.31) * 100 = 24.26%.

Therefore, Jean's equity as a percent of the house value is 24.26%.

Now, let's move on to Nastya's question.

To calculate Nastya's annual payments on a fully amortizing loan, we need to use the formula for calculating the monthly payment:

P = r * PV / (1 - (1 + r)^(-n))

Where:
P = Monthly payment
r = Monthly interest rate (annual interest rate / 12)
PV = Present value of the loan
n = Total number of payments

Given:
PV = $622,422
Annual interest rate = 5.2%
n = 10 years

First, we need to convert the annual interest rate to a monthly interest rate: 5.2% / 12 = 0.43333%.

Next, we substitute the values into the formula and solve for P:

P = (0.0043333 * 622422) / (1 - (1 + 0.0043333)^(-10))

Using a calculator, we get P ≈ $7,350.68.

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Answer:

Yes

Step-by-step explanation:

The reason can simply because they are similar shapes (triangle) which reports same sides same angle

Using exponential function it will take approximately 2.6 years for the population to reach 26676

Exponential function, as its name suggests, involves exponents. But note that, an exponential function has a constant as its base and a variable as its exponent but not the other way round (if a function has a variable as the base and a constant as the exponent then it is a power function but not an exponential function). An exponential function can be in one of the following forms.

The formula given in this question is

P(t) = 988(3.5)ˣ

The time it will take to reach a population of 26676 is

26676 = 988(3.5)ˣ

x = 2.6 years

It will take approximately 2.6 years

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The expression equivalent to 4^-5 • 3^-5  is 12^-5

Equivalent expressions are simply known as expressions with the same solution but different arrangement.

Given the index expressions;

4^-5 • 3^-5

Using the exponent rule, the two values are have different bases but the same exponent and thus, we multiply the bases and leave the exponents the same way.

This can be written as;

4(3) ^ -5

expand the bracket

12^-5

Thus, the expression equivalent to 4^-5 • 3^-5  is 12^-5

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The equation of line is y = 12x and the number of boxes the shipping company can pack in 18 hour period is 216 boxes

The equation of a line is expressed as y = mx + b where m is the slope and b is the y-intercept

And y - y₁ = m ( x - x₁ )

y = y-coordinate of second point

y₁ = y-coordinate of point one

m = slope

x = x-coordinate of second point

x₁ = x-coordinate of point one

The slope m = ( y₂ - y₁ ) / ( x₂ - x₁ )

Given data ,

Let the number of hours be x

Let the number of boxes be y

Let the equation of line be represented as A

Now , the value of A is

Let the first point be P ( 5 , 60 )

Now , the slope of the line m = y/x

Substituting the values in the equation , we get

Slope m = 60 / 5 = 12

Now , the equation of line is y - y₁ = m ( x - x₁ )

Substituting the values in the equation , we get

y - 60 = 12 ( x - 5 )

y - 60 = 12x - 60

y = 12x

Now , when x = 18 hours

y = 12 ( 18 ) boxes

y = 216 boxes

Hence , the number of boxes is 216 boxes

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Answer:

I believe the correct answer is D

The steepest angle at which unconsolidated granular material remains stable is known as the angle of repose.

The steepest angle at which unconsolidated granular material remains stable is known as the angle of repose. This angle varies depending on the properties of the granular material such as size, shape, and degree of consolidation. The angle of repose is a critical factor in many fields such as engineering, geology, and agriculture. For example, in civil engineering, the angle of repose is essential in designing stable slopes and retaining walls. In agriculture, it is crucial for understanding the flow and distribution of granular materials such as seeds, fertilizers, and grains. In general, the angle of repose for unconsolidated granular materials ranges from 25 to 45 degrees, but it can be higher for certain materials such as sand, or smaller for cohesive soils.
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Answer: Yes, it is linear. The slope is -2

Step-by-step explanation:

move the 2x over to the other side and get y=-2x+4, the slope in a linear equation is m in the formula y=mx+b, in this case, m=-2

Answer:

-4.29

Step-by-step explanation:

The computation of the z score is shown below:

data provided in the question

Average minutes = 16 minutes

Standard deviation = 1.4 minutes

Amount of advertising time = 8 minutes

Based on the above information, the z score is

\(= \frac{x-m}{\sigma} \\\\ = \frac{8-14}{\1.4} \\\\ = \frac{-6}{1.4}\)

= -4.29

Hence, the z score is -4.29. It is come by considering the above formula

Answer:

a. With replacement

1/2197

b. Without replacement

1/5,525

Step-by-step explanation:

Okay, here is a probability question.

The key to answering this question is by knowing the number of aces in a deck of cards.

There is 1 ace per suit, so there is a total of 4 aces per deck of cards.

So, mathematically the probability of picking an ace would be;

number of aces/ total number of cards = 4/52 = 1/13

a. Now since the action is with replacement; that means that at any point in time, the total number of cards would always remain 52 even after making our picks.

So the probability of picking three aces with replacement would be;

1/13 * 1/13 * 1/13 = 1/2197

b. Without replacement

what this action means is that after picking a particular card, we do not return the picked card to the deck of cards.

For the first card picked, we will be having a total of 4 aces and 52 total cards.

So the probability of picking an ace would be 4/52 = 1/13

For the second card picked, we shall be left with selecting an ace out of the remaining 3 aces and the total remaining 51 cards

So the probability will be 3/51 = 1/17

For the third and last card to be picked, we shall be left with picking 1 out of the remaining 2 aces cards and out of the 50 cards left in the deck.

So the probability now becomes 2/50 = 1/25

Thus, the combined probability of picking 3 aces cards without replacement from a deck of cards will be;

1/13 * 1/17 * 1/25 = 1/5,525

Using the binomial and the hypergeometric distribution, it is found that the probabilities are:

a) 0.0005 = 0.05%.

b) 0.0002 = 0.02%.

Item a:

With replacement, hence the trials are independent, and the binomial distribution is used.

Binomial probability distribution

\(P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}\)

\(C_{n,x} = \frac{n!}{x!(n-x)!}\)

The parameters are:

For this problem:

The probability is P(X = 3), then:

\(P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}\)

\(P(X = 3) = C_{3,3}.(0.0769)^{3}.(0.9231)^{0} = 0.0005\)

0.0005 = 0.05% probability.

Item b:

Without replacement, hence the trials are not independent and the hypergeometric distribution is used.

Hypergeometric distribution:

\(P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}\)

\(C_{n,x} = \frac{n!}{x!(n-x)!}\)

The parameters are:

In this problem:

The probability is also P(X = 3), hence:

\(P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}\)

\(P(X = 3) = h(3,52,3,4) = \frac{C_{4,3}C_{48,0}}{C_{52,3}} = 0.0002\)

0.0002 = 0.02% probability.

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