PLS HELP ASAP!!!!

Fifty-two of 80 marbles are red. What percent of the marbles are not red?

Answer:

-3/1

Step-by-step explanation:

Answer:

I would say 7, because if you think about you would know that your answer is 7

The statistic that the value 24.7 represents in this context is the median of the gas mileages for the cars tested.

Popular magazine that tests cars and trucks for mileage on the road and around the city. They report that 50% of the cars tested had mileages below 24.7 mpg on the road, and the other 50% had mileages above 24.7 mpg. The 24.7 mpg statistic represents the median of the gas mileages for the cars tested. This is because the median is the middle value when the data is arranged in ascending order, and in this case, it separates the lower 50% from the upper 50% of the mileages.

The median is the value that separates the data set into two halves. In this case, the magazine reports that 50% of the cars tested had mileages below 24.7 mpg on the road and the other 50% of the cars tested had mileages above 24.7 mpg. This means that 24.7 mpg is the exact middle value of the distribution of the gas mileages for the cars tested.

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Answer:

B , D

Step-by-step explanation:

domain

x - 3 ≠ 0

x ≠ 3

range

(x-3)y = 2 -7(x-3)

xy - 3y = 2-7x + 21

7x + xy = 3y + 21

x(7+y) = 3y + 21

x = 3/(7+y) + 21/(7+y)

y ≠ -7

The fraction of variation in the values of a response variable y that can be explained by the least-squares regression line is represented by the coefficient of determination, usually denoted as R^2.

R^2 is a statistical measure that indicates the proportion of the total variation in the response variable y that is accounted for by the linear relationship with the independent variable(s) used in the regression analysis. It is a value between 0 and 1, where:

- R^2 = 0 implies that the regression line explains none of the variation in y.

- R^2 = 1 implies that the regression line explains all of the variation in y.

In other words, R^2 represents the goodness-of-fit of the regression model. It indicates the strength of the linear relationship and how well the model fits the observed data.

To calculate R^2, it is necessary to perform a regression analysis and obtain the sum of squares for the regression (SSR) and the total sum of squares (SST). The formula for calculating R^2 is:

R^2 = SSR / SST

Where:

- SSR is the sum of squares for the regression (explained variation).

- SST is the total sum of squares (total variation).

R^2 provides valuable insight into the explanatory power of the regression model. It helps determine the proportion of the response variable's variation that can be attributed to the independent variable(s) considered in the analysis.

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Answer:

2.42666666666666666

Step-by-step explanation:

2.56+2.02+2.7 = 7.28

7.28/3 = 2.426666666

Answer:

  $19,000

Step-by-step explanation:

The balance is the sum of the principal amount and the interest it earns:

  A = P + I

  A = P + Prt

  A = P(1 +rt)

  A = $10,000(1 +.06×15)

  A = $19,000 . . . balance after 15 years

Answer:

The Answer to Your Question :

Sin(x) and Cos(x) are each other’s derivative functions.

dSin(x)/dx = Cos(x)

dCos(x)/dx = -Sin(x)

Here are some other relationships where x is between 0 and 90

Sin(90 - x) = Cos(x)

Cos(90 - x) = Sin(x)

Sin(90 + x) = Cos(x)

Cos(90 + x) = -Sin(x)

Sin(270 - x) = -Sin(x)

Cos(270 - x) = Cos(x)

Sin(270 + x) = -Cos(x)

Cos(270 + x) = Sin(x)

Some multiple angle sin-cos relationships

sin(x/2) = +-sqrt((1-cos(x))/2)

Some helpful facts

Sin(-x) = -Sin(x) [due to perfect asymmetry about x=0]

Cos(-x) = Cos(x) [due to symmetry about x=0]

Step-by-step explanation:

Hope this helps!!!

- Amaya

Answer:

Step-by-step explanation:

Given the solution to the equation y to be cos⁻¹(1)

y = cos⁻¹(1)

y =0°

In trigonometry identity, the general solution for cosine function is expressed as θ = 2kπ ± n, where n is any integer.

Substituting the solution gotten to the equation above into the general formula θ = 2kπ ± n, will give;

y = 2kπ ± n

since we have just one solution, we will find the value of y at n = 0

y = 2kπ ± 0

y = 2kπ

Answer: 1.889

Step-by-step explanation:

Answer:

x = 2

Step-by-step explanation:

The triangle is reflected across the circle meaning it should be the same on both sides.

In option (C) the values x = 1 and y = 4 make the equation true.

So, On the graph of an equation, point (1, 4) is located.

Thus, the line's equation has a solution of x = 1 and y = 4, and these values make the equation true.

Therefore, in option (C) the values x = 1 and y = 4 make the equation true.

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The correct question is given below:

If the point (1, 4) is on the graph of an equation, which statement must be true?

(A) The values x = 4 and y = 1 make the equation true.

(B) There are solutions to the equations for the values x = 1 and y = 4.

(C) The values x = 1 and y = 4 make the equation true.

(D) The values x = 1 and y = 4 are the only values that make the equation true.

Answer:

9c because you don't know how much money Kelly actually spent so instead of doing 9 x the price of each box, you replace it with c, so it's 9c

Step-by-step explanation:

Answer:

18 children weighed less than 50 pounds.

Step-by-step explanation:

Ok, adding into the explanation what the heck this kind of a table is. The "stem" column is the tens place of each of the children's weights. The "leaf" is the ones digit of each of the children's weights. So in the row where the stem is 2, there were 2 kids weighing 23 and 25 pounds.

For your question, we have to add up how many students have a weight with a "stem" less than 5, because that's where 50 pounds starts.

8 + 2 + 5 + 3 = 18 children weighed less than 50 pounds.

The number of means is 13. Option B

We can use the formula for the nth term of an arithmetic sequence to solve the problem. Let d be the common difference and n be the number of terms between -65 and 125.

Then we have:

a + (n-1)d = 125 (1)

a + nd = -113 (2)

Subtracting equation (2) from equation (1), we get:

(n-1)d + 238 = 0

Solving for d, we get:

d = -238/(n-1)

Using the formula for the twelfth term, we have:

a + 11d = -113

Substituting the expression for d, we get:

a - 11(238/(n-1)) = -113

Multiplying both sides by n-1, we get:

a(n-1) - 11(238) = -113(n-1)

Substituting a = -65 and simplifying, we get:

n = 13

Therefore, the number of means is 13

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A) The null hypothesis is that the population mean flying time between the two cities is equal to the published time of 56 minutes.

B) If the true mean flying time is 50 minutes, a Type II error can be made.

C) If the true mean flying time is 56 minutes, a Type I error could be made.

A) The null hypothesis is that the population mean flying time between the two cities is equal to the published time of 56 minutes. The alternative hypothesis is that the mean flying duration in the population is not 56 minutes.

H0: μ = 56

Ha: μ ≠ 56

B) If the true mean flying time is 50 minutes, a Type II error can be made. A Type II error occurs when we fail to reject a misleading null hypothesis. In this case, failing to reject the null hypothesis (that the population mean flying time is equal to 56 minutes) when the true mean is actually 50 minutes would be a Type II error. The probability of making a Type II error depends on the significance level of the test, the sample size, and the variability of the population. In this context, if the true mean is 50 minutes, the error represents that the airline is taking longer to complete the flight compared to the advertised time.

C) If the true mean flying time is 56 minutes, a Type I error could be made. When we reject the true null hypothesis, we make a Type I error. In this case, rejecting the null hypothesis (that the population mean flying time is equal to 56 minutes) when the true mean is actually 56 minutes would be a Type I error. The probability of making a Type I error depends on the significance level of the test. In this context, if the true mean is 56 minutes, the error represents that the airline is taking less time to complete the flight than the advertised time.

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Answer: I think the answer is 4.

Step-by-step explanation:

I am not sure because i am just in 5th grade (10) so might be wrong and i am so sorry if its wrong.

Answer:

9.955

Step-by-step explanation:

The polynomial function with leading coefficient of 3 and root -4, i, and 2 all with multiplicity of 1 is f(x) = 3(x+4)(x-i)(x+2)

The Leading coefficients are the numbers written in front of the variable with the largest exponent.

Roots of a polynomial refer to the values of a variable for which the given polynomial is equal to zero.

The multiplicity is the number of times a given factor appears in the factored form of the equation of a polynomial.

Therefore, the polynomial f(x) = 3(x+4)(x-i)(x+2) has a root -4 , 1 and -2.

The leading coefficient is 3. The multiplicity is all one.

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Answer:

d

Step-by-step explanation:

To derive the analytical expressions for the optimal portfolio weights of the first and second assets, we need to maximize the expected utility function.

Let's assume the weights of the first and second assets are denoted by w1 and w2, respectively. Since there is no risk-free security available, the sum of weights must be equal to 1: w1 + w2 = 1.

To find the optimal portfolio weights, we need to maximize the expected utility function with respect to w1 and w2. This can be done using optimization techniques, such as Lagrange multipliers or calculus.

We can start by taking the derivative of the expected utility function with respect to w1 and set it equal to zero to find the critical points. Similarly, we take the derivative with respect to w2 and set it equal to zero.

Next, we solve these equations to find the values of w1 and w2 that satisfy the equations. These values will give us the optimal portfolio weights for the first and second assets.

Ihe analytical expressions for the optimal portfolio weights of the first and second assets can be derived by maximizing the expected utility function and solving the resulting equations.

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Answer:

To find the confidence interval for the mean weight of all baby Orca whales, we can use the following formula:

Confidence interval = estimate ± (critical value) × (standard error)

where:

estimate = sample mean

critical value = the value from the t-distribution that corresponds to our desired confidence level and degrees of freedom

standard error = standard deviation of the sample divided by the square root of the sample size

First, we need to calculate the sample mean and standard deviation:

Sample mean:

x = (425 + 454 + 380 + 405 + 395) / 5 = 411.8 pounds

Sample standard deviation:

s = sqrt(((425 - 411.8)^2 + (454 - 411.8)^2 + (380 - 411.8)^2 + (405 - 411.8)^2 + (395 - 411.8)^2) / 4) = 28.6 pounds

Next, we need to find the critical value from the t-distribution with degrees of freedom (n - 1) and our desired confidence level of 98%. With a sample size of 5, our degrees of freedom is 4. Using a t-table or a calculator, we find the critical value to be 3.747.

Finally, we can calculate the confidence interval:

Confidence interval = 411.8 ± 3.747 × (28.6 / sqrt(5)) = 411.8 ± 45.1

Rounded to the nearest tenth of a pound, the confidence interval is:

Confidence interval = 411.8 ± 45.1 = [366.7, 456.9]

Therefore, we can say with 98% confidence that the true mean weight of all baby Orca whales is between 366.7 and 456.9 pounds

We get

(A) The probability that her winnings will exceed zero is 0.50.

(B) The probability that her winnings will be less than zero is 0.25.

(c) Her winnings' estimated worth is 0.

Given that,

A player engages in a game where the odds of winning or losing one dollar are equal. The games are stand-alone. The game will be played until the first win occurs, at which point the player will instantly stop.

We have to find

(A) determine the probability that her winnings will exceed zero.

(B) calculate the probability that her winnings will be less than zero.

(c) calculate her winnings' estimated worth.

We know that,

a) probability that her winnings are greater than zero =P(wins 1st game) =1/2 =

b) probability that her winnings are less than zero =P(lose 1st 2 games) =(1/2)×(1/2 )=1/4 =0.25

c) below is pmf of X (gain from the game)

P(X=1)=P(win 1st game) =1/2

P(X=0)=P(lose 1st and win 2nd) =(1/2)×(1/2) =1/4

P(X=-1)=P(lose 1st two and wins 3rd)=(1/2)×(1/2)×(1/2) =1/8

P(X=-2)=1/16

therefore expected value E(X )=ΣxP(x) =1×1/2+0×1/4-1×1/8-2×1/16........

= (1/2)+0-(1×1/8+2×1/16+3×1/32+4×1/64+...)

=(1/2)-(1/4)×(1/(1/2))

=(1/2)-(1/2)

=0

Therefore,

(A) The probability that her winnings will exceed zero is 0.50.

(B) The probability that her winnings will be less than zero is 0.25.

(c) Her winnings' estimated worth is 0.

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If the slope of the line is 7 /10, the vertical change that will be present for a horizontal change of 63 ft is 44.1 ft

The slope of a line is the measure of its steepness. Therefore,

slope = change in y(vertical) / change in x(horizontal)

slope = y₂ - y₁ / x₂ - x₁

slope = 7 / 10

Therefore,

7  / 10 = y / 63

cross multiply

441 = 10y

divide both sides by 10

y = 441 / 10

y = 44.1 ft

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Answer:

13 inches (to nearest inch)

Step-by-step explanation:

if volumes are in ratio 216:64, then lengths/heights must be in ratio

∛216: ∛64

= 6:4.

this can be simplified to 3:2.

3/2 = 1.5.

that means the height of larger cone is 1.5 times taller than height of the smaller cone.

let's call height of smaller cone d.

20 = 1.5d

d = 20/1.5

= 13.33

= 13 inches (to nearest inch)

Therefore, the correct option is "Cannot be determined with the given information." when the least squares regression line for a data set is y=2.3−0.1x and the standard deviation of the residuals is 0.13.

To determine if a case with the values x = 4.1, y = 2.34 qualifies as an outlier, we need to compare the observed value of y (2.34) with the predicted value of y based on the regression line (Y).

For this case, the predicted value of y (Y) can be calculated using the equation of the least squares regression line:

Y = 2.3 - 0.1x

Y = 2.3 - 0.1 * 4.1

Y = 2.3 - 0.41

Y = 1.89

Now, we can compare the observed value of y (2.34) with the predicted value of y (1.89). If the observed value significantly deviates from the predicted value, it can be considered an outlier.

In this case, the observed value (2.34) is greater than the predicted value (1.89), suggesting that it is above the regression line. However, without knowing the specific criteria or threshold for defining an outlier, it cannot be conclusively determined if this case qualifies as an outlier based solely on the information given.

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Answer:

Step-by-step explanation:

85/1000 because we said that 1 meter = 1000 mililiters

Divide both sides by 5 and then you have 17/200

then divide both sides by 2 (to get it over 100) =

8.5/100

.085%

Hope that helps!!

You could also just do 85/1000 you would get the same answer!!

The length of the diagonal of the square is 22 meters.

A square is a four-sided two-dimensional geometric shape in which all sides are equal in length and all angles are right angles (90 degrees).It is a unique instance of a rectangle with equal sides. The opposite sides of a square are parallel to each other and the diagonals bisect each other at right angles.

A square is divided into two 45-45-90 triangles by its diagonal.

In a 45-45-90 triangle, the hypotenuse (the side opposite the right angle) is √2 times as long as each leg.

Therefore, in this square, the length of the diagonal (d) can be found by multiplying the length of one side (s) by √2:

d = s√2

In this case, the side length of the square is 11√2 meters, so:

d = 11√2 × √2 = 11 × 2 = 22 meters

Therefore, the length of the diagonal of the square is 22 meters.

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Answer:

The solution is (2,5)

Step-by-step explanation:

The solution to the system of equations is where to the two graphs intersect

The two lines intersect at x=2 and y = 5

The solution is (2,5)

Answer:

Hey there!

The solution for a system of equations (simultaneous equations), is where the two lines intersect.

We see that the lines intersect at (2,5), making (2,5) the solution to the system of equations.

Let me know if this helps :)

Answer:

-21

Step-by-step explanation:

i searched it up