i need help ;^; please​

Four special two digit numbers exist: 1, 2, 145, and 40585.

A special two-digit number is one in which the original two-digit number is equal to the sum of the number's digits plus the product of its digits. Take the number's initial and last digits out, then add and multiply each digit independently. After that, multiply the two-digit number by the sum and product of its digits and then compare the result to the original value. If they match, it qualifies as a special two-digit number; otherwise, it does not.

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Yes, the continuous time complex exponential is always periodic, and it is because complex exponentials can be written using Euler's formula.

Euler's formula, in mathematics, is a formula that links five fundamental mathematical constants:

e, the base of the natural logarithm;

pi, a mathematical constant;

i, an imaginary unit;

1, the multiplicative identity; and

0, the additive identity.

The formula is

\(e^{ix} = cos(x) + i sin(x)\)

In the above formula, x is a real number. cos(x) and sin(x) are the trigonometric functions cosine and sine, respectively. And i is the imaginary unit.

In general, periodic functions are mathematical functions that repeat themselves after a certain period. And when complex exponentials can be written using Euler's formula, they can also be expressed as:

\(cos(x) =\frac{1}{2} (e^{ix} + e^{-ix})sin(x) = 1/2i (e^{ix} - e^{-ix})\)

As a result, it can be concluded that the continuous time complex exponential is always periodic since it can be expressed using Euler's formula, and Euler's formula can also be written in a periodic form.

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Based on the given information, it is not possible to determine the p-value, decision to reject (rh0) or failure to reject (frh0) without additional data or context.

To assess whether the relaxation exercise slowed brain waves, a statistical analysis should be conducted on a sample from the population.

The analysis would involve measuring brain waves before and after the exercise and comparing the results using appropriate statistical tests such as a t-test or ANOVA. The p-value would indicate the probability of observing the data if there was no effect, and the decision to reject or fail to reject the null hypothesis would depend on the predetermined significance level.

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Hi!
Let's write this out.
Her limit is $900, and she's used $450. So, we subtract 450 from 900.
900-450 = 450.

So, she has $450 available credit left.
Hope this helps!
~~~PicklePoppers~~~

Answer: your credit utilization ratio on that card would be 50% but the answer is 450

Step-by-step explanation:

900-450 = 450

Answer:

In mathematics, a rational number is a number that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. For example, −3/7 is a rational number, as is every integer.

The two vectors [2x + 4y; 6x + 8y] and [2x; 2y], we can see that they are not equal. Therefore, lambda = 2 is not an eigenvalue of matrix A. To determine if lambda is an eigenvalue of the matrix A, we need to find if there exists a non-zero vector v such that Av = lambda * v.

1. Let's start by computing the matrix-vector product Av.
2. Multiply each element of the first row of matrix A by the corresponding element of vector v, then sum the results. Repeat this for the other rows of A.
3. Next, multiply each element of the resulting vector by lambda.
4. If the resulting vector is equal to lambda times the original vector v, then lambda is an eigenvalue of matrix A. Otherwise, it is not.

For example, consider the matrix A = [1 2; 3 4] and lambda = 2.
Let's find if lambda is an eigenvalue of A by solving the equation Av = lambda * v.

1. Assume v = [x; y] is a non-zero vector.
2. Compute Av: [1 2; 3 4] * [x; y] = [x + 2y; 3x + 4y].
3. Multiply the resulting vector by lambda: 2 * [x + 2y; 3x + 4y] = [2x + 4y; 6x + 8y].
4. We need to check if this result is equal to lambda times the original vector v = 2 * [x; y] = [2x; 2y].

Comparing the two vectors [2x + 4y; 6x + 8y] and [2x; 2y], we can see that they are not equal. Therefore, lambda = 2 is not an eigenvalue of matrix A.

In summary, to determine if lambda is an eigenvalue of matrix A, we need to find if Av = lambda * v, where v is a non-zero vector. If the equation holds true, then lambda is an eigenvalue; otherwise, it is not.

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In a paired t-test, we use the D) Difference. of two observations for each subject.

A paired t-test is a statistical test used to compare the means of two related groups. In this test, we use the difference of two observations for each subject.

For example, if we are comparing the effectiveness of two different drugs, we would measure the response of each patient to both drugs and then calculate the difference between the two responses.

This gives us a single value for each subject that represents the change in response between the two drugs. We then use these differences to calculate the t-statistic.

The formula for the t-statistic in a paired t-test is:

t = (mean difference / (standard deviation of differences / √n))

Where n is the number of pairs of observations. This formula uses the mean difference (i.e., the average of the differences between the two groups), which is calculated by subtracting the second observation from the first observation for each subject.

Therefore, the correct answer to the given question is D. Difference.

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Next two terms of the sequence 4, 8, -16, -32, 64, ?, ? are 128 and -256.

How to solve question in sequence?

Every sequence has certain logic which can be used to find next terms.

Mainly operations like addition, subtraction, multiplication, squares and cubes are used to find the logic.

Trial and error method is applied to comprehend the logic of sequence.

4, 8, -16, -32, 64, A, B.

According to the given question, the sequence can be split in two separate sequences by taking alternate terms -

1) 4, -16, 64, B

2) 8, -32, A

Now clearly the logic is:

Next term is obtained by multiplying the previous term with -4.

Let's check 4x(-4) = -16x(-4) = 64

∴ B = 64x(-4) = -256

Similarly, 8x(-4) = -32

∴ A = -32x(-4) = 128

Hence completed sequence is 4, 8, -16, -32, 64, 128, -256.

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The diver collected water samples at every 3 meters, starting from 5 meters below the water surface, up to a final depth of 35 meters.

We can find the number of samples collected by dividing the total depth range by the distance between each sample and then adding 1 to include the first sample.

The total depth range is:

35 m - 5 m = 30 m

The distance between each sample is 3 m, so the number of samples is:

(30 m) / (3 m/sample) + 1 = 10 + 1 = 11

Therefore, the diver collected a total of 11 water samples.

The mean value is calculated to be 10.3. The mean of the given sample is 10.3 (rounded to 1 decimal place).

The sample is as follows: 9.3, 14.9, 8, 8.2, 17.6, 9, 5.7.

The mean of the given sample is to be determined. We can find the mean of the sample using either Stakey or Excel. Stakey Method:1. Copy the data.2.

Open the "One Quantitative Variable" function in Stakey.

Paste the copied data into the "Edit Data" section.

Summary statistics are displayed on the right side of the screen.5

From the summary statistics, the mean is calculated to be 10.2571. Excel Method:1. Copy the data.

Paste the data into an Excel sheet.3.

Highlight all the data values.4. In a blank cell, type the formula "=AVERAGE()" and insert the data range (i.e., data values in the cell range) within the parenthesis. 5. Press Enter.

The mean value is calculated and displayed in the cell.

The mean value is calculated to be 10.3. The mean of the given sample is 10.3 (rounded to 1 decimal place).

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Oven hours are a binding constraint because Tori needs 0.04 x 200, or 8 hours, to manufacture 200 chocolate chips, and the same is true for the upper-level restriction.

Binding restrictions are those whose removal would lead to the largest advances in entrepreneurship and growth. Some locations are unbound. The dual value measures how much the objective function's value rises for each additional unit of the variable's value. A constraint's dual value only deviates from zero when it equals its bound.

This is a binding constraint, and during optimization, its value was pushed as close as possible to the bound. If your answer matches the Right-Hand Side (RHS) of the inequality, the constraint is BINDING. If your response does not match the RHS of the inequality, the constraint is NON-BINDING.

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Answer:

14 new wheels

Explanation:

Let the number of old and new wheels be x and y respectively

The car has a total of 18 wheels, therefore:

All the 8 fixed wheels were old, so, the least number of new wheels will be:

However, if at maximum, she fixed each old wheel twice:

The most possible new wheels on the car when Jean bought it is 14.

(C) Regression analysis is the statistical method commonly used to estimate the level and trend in a time series by modeling the relationship between the data and independent variables.

Regression analysis is the statistical method used to estimate the level and trend in a time series. Time series data represents observations taken at different points in time and is commonly used to analyze trends and patterns over time.

Regression analysis allows us to model the relationship between a dependent variable (in this case, the time series data) and one or more independent variables (such as time or other relevant factors). By using regression analysis, we can identify the underlying trend in the time series and estimate its level.

The regression model captures the relationship between the dependent variable (the time series) and the independent variable(s) by fitting a line or curve that best represents the data. This line or curve helps to identify the overall trend and level of the time series.

While moving average, simulation method, covariance analysis, and correlation analysis are useful techniques in analyzing time series data, they are not specifically designed to estimate the level and trend in a time series. Therefore, (C) regression analysis is the most appropriate method for estimating the level and trend in a time series.

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15(x+3) = 2x(12)

15x+45 = 24x

45 = 9x

x = 5

The radius of a circle is 13.33 centimeters and the area of a circle is 557.94 square centimeters.

Given that, the circumference of the hub cap of a tire is 83.71 centimeters.

We know that, the circumference of a circle is 2πr.

Here, 2πr=83.71

2×3.14×r=83.71

r=83.71/6.28

r=13.33

As we know, the area of a circle = πr²

Here, area = 3.14×13.33²

= 557.94 square centimeters

Therefore, the radius of a circle is 13.33 centimeters and the area of a circle is 557.94 square centimeters.

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Comparing the means of the two samples, we find that the difference between the means is significant. Therefore, we can reject the claim and conclude that male and female high school students have different exam scores.

To perform the two-sample t-test, we first calculate the standard error of the difference between the means using the formula:

SE = sqrt((s1^2 / n1) + (s2^2 / n2))

Where s1 and s2 are the population standard deviations of the male and female students respectively, and n1 and n2 are the sample sizes. Plugging in the values, we have:

SE = sqrt((47^2 / 49) + (4.3^2 / 53))

Next, we calculate the t-statistic using the formula:

t = (x1 - x2) / SE

Where x1 and x2 are the sample means. Plugging in the values, we have:

t = (239 - 21.1) / SE

We can then compare the t-value to the critical t-value at α = 0.01 with degrees of freedom equal to the sum of the sample sizes minus 2. If the t-value exceeds the critical t-value, we reject the null hypothesis.

In this case, the t-value is calculated and compared to the critical t-value using the provided standard normal distribution table. Since the t-value exceeds the critical t-value, we can reject the claim that male and female high school students have equal exam scores.

Therefore, the correct answer is:

B. Male and female high school students have different exam scores.

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Solution;

The answer is 11

Answer:

x = 8

Explanation:

\(\frac{3x^2}{4} =48\)

multiply both sides by 4: \(3x^2=192\)

divide both sides by 3: \(x^2=64\)

take the square root:

\(\sqrt{x^2} = \sqrt{64} \\x=8\)

Answer:

I think the answers are, rational and real.

Step-by-step explanation:

- 14 belongs to the sets of rational numbers and real numbers.

Rational Numbers: Any number that may be written as a ratio (or fraction) of integers is a rational quantity.

A Rational number is a number that is expressed because of the ratio of two integers, wherein the denominator ought to now not be the same as zero, whereas an irrational number cannot be expressed inside the form of fractions. Rational numbers are terminating decimals however irrational numbers are non-terminating and non-habitual.

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Answer:

i think the answer is 90

Step-by-step explanation:

i hope this helped you have a nice day :)

A statement 'He is not the winner, then, he is sick.' is a valid argument.

To test the validity of a given argument, we need to see if we can find a counter-example that makes one of the statements non-valid. If after analyzing the statements we can't find a counter-argument, then we can conclude that the argument is valid.

Here we will find that the argument is valid.

We can write given statement as:

1) If he participates in a race then he is the winner.

2) Either he participates in the race, or he is sick.

3) He is not the winner, then, he is sick.

Now, from the first statement, we know that this person participates in a race, he wins.

From the second statement we know that he only participates if he is not sick, we can rewrite that one as:

"If he is sick, then he does not participate in the race".

Finally, from the third one, if he does not win, then he is sick.

This makes sense, he only does not participate when he is sick, then the only races where he is not the winner, are these races where he does not participate, and he does not participate only if he is sick, then this is a valid argument.

Concluding, the 3 statements are valid, as we can't find any counter-argument to any of these 3.

Therefore, a statement 'He is not the winner, then, he is sick.' is a valid argument.

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Answer:

Step-by-step explanation:

B

Answers:

========================================================

Explanation:

The equation is y = 10x+550

If x = 0, then it leads to y = 550. This is the smallest amount paid, and it's the base fee. Think of it like the fee to get in the door. This is the y intercept of the equation.

On top of this base fee is the $10 per hour fee for utilities. Each time an hour goes by, add on another extra $10. So we attached x to this to reflect what's going on. This is the slope of the equation, aka rate of change.

It might be helpful to compare y = mx+b to y = 10x+550

m = 10 = slope = how things change

b = 550 = y intercept = starting point

----------

Example:

Let's say you rented the barn for 2 hours.

That means x = 2 and 10x = 10*2 = 20 extra dollars is added on top of the base fee of $550

total = 20+550 = 570

This is what the steps could look like when plugging in x = 2

y = 10x+550

y = 10*2 + 550

y = 20 + 550

y = 570

Therefore, renting the barn for x = 2 hours leads to a total cost of y = 570 dollars.

Answer:

Step-by-step explanation:

The coordinate plane is also called a Cartesian Plane. Function. A function is a relationship where there is only one output for every input. In other words, for every value of x, there is only one value for y.

Does this help?

Answer:

It is NOT a function.

Step-by-step explanation:

It does not pass the vertical line test. A vertical line can touch the graph in more than one point.

To be a function, every x can have only one y value. On this graph almost every single x has two y's. For example when x is -6, the y is 2 and also 8. Not a function.

The different ways that are there for the students to be ordered in the list so that Ed is higher on the list than Ned is 19,958,400

In the order, if Ned comes first on the list then Ed will not be on the list before Ned. (remember for Ed to be higher than Ned on the list, it should come after Ned on the list).

So if Ned is first on the list, then all the remaining (including Ed) can occur anywhere in the remaining list. Hence the total permutations will be 10!

Ned's corresponding choices: 1 109 8 7 6 5 4 3 -2 1

If Ned comes in the second position, then Ed can't come in the first position. Hence in the first position, there are only 9 choices.

*(excluding Ed) Ned * corresponding choices:

= 9*9!

*(including Ed (including Ed) Ned corresponding choices: *k

= 9*8*8!

Total combinations will be:

10! + 9*9! + 9*8*8! + 9*8*7*7! + 9*8*7*6*6! + 9*8*7*6*5*5! + 9*8*7*6*5*4*4! + 9*8*7*6*5*4*3*3! +9*8*7*6*5*4*3*2*2! + 9*8*7*6*5*4*3*2*1*1! .

= 19,958,400

We can directly compute it. Since there will be a total of 11! combinations in which 11!/2 times Ed comes after Ned and 11!/2 times Ed comes before Ned.

and 11!/2 = 39,916,800/2 = 19,958,400

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The probability of winning a certain lottery is p = 1/64,481. For a single play, the expected number of wins is E(X) = 1*p + 0*(1-p) = p.

The variance of the number of wins for a single play is\(Var(X) = p(1-p) = 1/64,481 * 64,480/64,481 = 64,480/64,481^2\).

For 669 plays, the expected number of wins is 669p and the variance of the number of wins is \(669Var(X) = 669(64,480/64,481^2) = 668.99/64,481\).

The standard deviation is the square root of the variance, so the answer is approximately sqrt(668.99/64,481) = 0.309.

Therefore, the closest answer choice is D) 0.3.

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Answer:

Let x = the number of lbs of Type A coffee.

We know that this month's blend used 3 times as many pounds of type B coffee as type A coffee.

Total lbs of coffee = x + 3x

The total cost then is:

($ cost for Type A)(x) + ($ cost for Type B)(3x) = $717.60

$5.65x + $4.25(3x) = $717.60

$5.65x + $12.75x = $717.60

$18.40x = $717.60

x = 39 lbs

Factors are parts of an expression that are multiplied. Coefficients, variables, and quantities in grouping symbols can be factors.​

An expression can be defined as a mathematical equation which is used to show the relationship existing between two or more variables and numerical quantities.

Factors can be defined as the fundamental building blocks of a number. This ultimately implies that, factors refers to numbers which can be multiplied together to get another number.

For example, we have:

24 = 8 × 3.

In this context, we can infer and logically deduce that a number is made up of other numbers, called factors. Therefore, factors are parts of an expression that are multiplied together. Also, coefficients, variables, and quantities in grouping symbols can be factors.​

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