Who want 20 points answer and it gotta be right

Answer:

The exact value of cos(45°) is √(2) / 2.

Step-by-step explanation:

Answer:

Answer:√2/2=cos45

√2/2×√2/√2=2/2√2

1/√2

The length of a leg of the given isosceles triangle is 17 units.

Let us suppose the length of the equal legs of the given isosceles triangle a, and the base length of the given triangle be b.

Given that the perimeter of the isosceles triangle is 50

P = 50 units.

a + a + b = 50 units

2a + b = 50

b = 50 - 2a __(eq.1)

The following diagram represents all measures: (to see in the bottom)

Given that the length of the altitude to its base is 15 units.

h = AD = 15 units.

In the right triangle ABD, according to the Pythagorean theorem:

\((AB)^2=(BD)^2+(AD)^2\)

\(a^2=(\frac{b}{2} )^2+15^2\)

\(a^2=\frac{b^2}{4} +225 ------(eq.2)\)

From Equation (1) and (2)

\(a^2=\frac{(50-2a)^2}{4}+225 \\\\a^2=\frac{2500+4a^2-200a}{4}+225\\ \\a^2=\frac{2500+4a^2-200a+900}{4}\\ \\a^2=\frac{3400+4a^2-200a}{4}\\\\\\\)

\(4a^2=3400+4a^2-200a\\\\0=3400-200a\\\\200a = 3400\\\\a = \frac{3400}{200}\\ \\a=17\)

Hence, the length of a leg of the given isosceles triangle is 17 units.

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Step-by-step explanation:

To determine if a system of two equations with two unknowns has infinite solutions using matrices, you can perform Gaussian elimination or row reduction on the augmented matrix of the system. If the reduced form of the matrix is the identity matrix, then the system has a unique solution. If the reduced form is a row of zeros except for the last column, then the system has no solution. If the reduced form has a row with all zeros except for the last column being non-zero, then the system has an infinite number of solutions.

In other words, the system has infinite solutions if the row reduced form of the augmented matrix has a row of the form [0 0 c], where c is a non-zero scalar. This means that there is a non-trivial solution that satisfies the equation, indicating that there are infinitely many solutions.

Answer:

divide 17 by the amount of days so 7 to get

2.42

then rounding it would be

2.4

Step-by-step explanation:

Answer:

She ran 2 miles per day

Step-by-step explanation:

17/7=2.42857143

2.4=2

Answer:

52 Labels

8 cabinets with 5 drawers 8x5=40

3 cabinets with 4 drawers 3x4=12

40+12=52

Answer:

Heather will need to make 57 labels to complete the task.

Step-by-step explanation:

There are 12 file cabinets.

Three of them have 4 drawers.

Heather will need to make 3*4=12 labels for these cabinets

The rest of the cabinets (12-3=9) have 5 drawers.

Heather will need to make 9*5=45 labels for these cabinets

The total of labels needed is 12+45=57.

Heather will need to make 57 labels to complete the task.

Quantity transacted between the distributor and manufacturer in one district: 200

Quantity transacted between the consumer and distributor in one district: 800

Wholesale price: $200/3

Retail price: $100

What is Monopolistic ?

A monopolistic market is a theoretical condition that describes a market where only one company may offer products and services to the public.

To determine the quantity transacted between the distributor and manufacturer in one district, the quantity transacted between the consumer and distributor in one district, as well as the wholesale price and retail price, we can analyze the monopolistic market structure and use the given information.

Quantity transacted between the distributor and manufacturer in one district:

In a monopolistic market, the manufacturer sets the quantity supplied based on the demand curve and the marginal cost. To find the quantity transacted, we equate the marginal cost to the marginal revenue, which is the derivative of the total revenue function.

Given:

Demand curve: Q = 1000 - 2P

Marginal cost: MC = $100

To find the quantity transacted, we set MC equal to the marginal revenue (MR):

MC = MR

Since the distributor is the only buyer from the manufacturer, the wholesale price is the same as the price received by the manufacturer. Therefore, MR is equal to the derivative of the manufacturer's revenue function, which is the inverse of the demand curve.

MR = d(TR)/dQ = P(1 - 1/slope of demand curve)

The slope of the demand curve is -2, so the marginal revenue becomes:

MR = P(1 + 1/2) = P(3/2)

Setting MC equal to MR:

$100 = P(3/2)

Solving for P, we find:

P = $200/3

Substituting this value of P into the demand curve, we can find the corresponding quantity:

Q = 1000 - 2P

Q = 1000 - 2($200/3)

Q = 1000 - ($400/3)

Q = 600/3

Q = 200

Therefore, the quantity transacted between the distributor and manufacturer in one district is 200.

Quantity transacted between the consumer and distributor in one district:

Since the distributor is the monopolist in retail for the district, they determine the quantity sold based on the demand curve and their marginal cost.

The distributor's marginal cost is the sum of the production cost and the distribution cost:

MC_distributor = $100 + $50 = $150

To find the quantity transacted between the consumer and distributor, we equate the marginal cost to the marginal revenue for the distributor.

MR_distributor = P(1 - 1/slope of demand curve)

MR_distributor = P(1 + 1/2)

MR_distributor = P(3/2)

Setting MC_distributor equal to MR_distributor:

$150 = P(3/2)

Solving for P, we find:

P = $100

Substituting this value of P into the demand curve, we can find the corresponding quantity:

Q = 1000 - 2P

Q = 1000 - 2($100)

Q = 1000 - $200

Q = 800

Therefore, the quantity transacted between the consumer and distributor in one district is 800.

Wholesale price:

The wholesale price is the price received by the manufacturer in the transaction with the distributor in one district. From the calculations above, we found that the wholesale price is $200/3.

Retail price:

The retail price is the price charged by the distributor to the consumers in one district. From the calculations above, we found that the retail price is $100.

To summarize:

Quantity transacted between the distributor and manufacturer in one district: 200

Quantity transacted between the consumer and distributor in one district: 800

Wholesale price: $200/3

Retail price: $100

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Therefore, the rate of the canoe in still water is 36 miles per hour.

Let's assume the rate of the canoe in still water is represented by r (miles per hour), and the rate of the current is represented by c (miles per hour).

When paddling with the current, the effective speed of the canoe is increased by the rate of the current, so the equation for the distance can be written as:

(r + c) * 4 = 64

When paddling against the current, the effective speed of the canoe is decreased by the rate of the current, so the equation for the distance can be written as:

(r - c) * 6 = (3/4) * 64

Simplifying the second equation:

6(r - c) = (3/4) * 64

6r - 6c = 48

Now we have a system of two equations:

(r + c) * 4 = 64

6r - 6c = 48

We can solve this system of equations to find the values of r and c.

Multiplying equation 1) by 6, we get:

6(r + c) = 6 * 64

6r + 6c = 384

Adding this equation to equation 2), the variable c will be eliminated:

6r + 6c + 6r - 6c = 384 + 48

12r = 432

Dividing both sides by 12, we find:

r = 36

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Answer:

35 divided by 4 is 8.75 so one movie ticket should be $8.75

Step-by-step explanation:

Answer:

first step

convert 180m and 1 cm in mm that is 180000mm and 10mm

then

ples mark me brainlist

Answer:

46°

Step-by-step explanation:

arcsin(5/7)

The probability that a card drawn at random from a full deck of 52 cards is either a jack or a black card is 27/52 or approximately 0.519.

To find the probability, we first need to determine the number of cards that meet the criteria. There are 4 jacks in the deck, so the probability of drawing a jack is 4/52 or 1/13. There are also 26 black cards in the deck (13 clubs and 13 spades), so the probability of drawing a black card is 26/52 or 1/2. However, we must subtract the 2 black jacks (the jack of clubs and the jack of spades) that we have already counted, so the total number of cards that are either a jack or black is 4 + 26 - 2 = 28. Thus, the probability of drawing a card that is either a jack or black is 28/52 or 7/13, which can be simplified to 27/52 or approximately 0.519.

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Answer:

D would be the wisest choice.

Step-by-step explanation:

Consider the taxes and extra expenses the purchase may have. They may raise the actual payment, plus if you don't pay the balance immediately it'll keep growing and growing until you're in deeper debt.

Hope this helped, have a nice day!

Answer: 875.5x

Step-by-step explanation:

Answer:

You could use 13+2x=t

x=number of weeks. t=total

The given statements

(a) [1+1] we can then conclude that all the means are different from one another is false

(b) [1] the standardized variability between groups is higher than the standardized variability within groups is true

(c) [1+1]the pairwise analysis will identify at least one pair of means that are significantly since there are four groups is true

(d) [1+1] the appropriate α to be used in pairwise comparisons is 0.05 / 4 = 0.0125 since there are four groups is true.

(a) False. Rejecting the null hypothesis that the means of four groups are all the same using ANOVA at a 5% significance level does not necessarily mean that all the means are different from one another. It only indicates that there is at least one group that is significantly different from the others, but it does not provide information about which groups are different.

(b) True. If the null hypothesis is rejected, it means that there is a significant difference between at least one group mean and the overall mean. This implies that the standardized variability between groups is higher than the standardized variability within groups.

(c) True. If the null hypothesis is rejected, it means that there is a significant difference between at least one group mean and the overall mean. Therefore, pairwise analysis will identify at least one pair of means that are significant since there are four groups.

(d) True. When conducting pairwise comparisons, the appropriate α level to be used should be adjusted to account for multiple comparisons. In this case, since there are four groups, the appropriate α level would be 0.05/4 = 0.0125 to control for the family-wise error rate.

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Answer:

The new vertices will be: A'(-1,-3), B'(-2,-2) and C'(-4,-3)

Step-by-step explanation:

Rotation about the origin depends on the degrees the point is being rotated and direction of rotation.

Let (x,y) be a point on the xy-coordinate plane,

When this point will be rotated about origin 90 degrees counter clockwise, the coordinates of the point become (-y,x) which means that the coordinates will be exchanged and y will be negated.

Given vertices of triangle are:

A(-3, 1), B(-2, 2), and C(-3, 4)

After rotation the new points will be:

A(-3, 1) => A'(-1,-3)

B(-2,2) => B'(-2,-2)

C(-3,4) => C'(-4,-3)

Hence,

The new vertices will be: A'(-1,-3), B'(-2,-2) and C'(-4,-3)

Answer: The given equation is y + 4 = x - 9, which can be rewritten as y = x - 13 by subtracting 4 from both sides and adding 9 to both sides.

We can see that the slope of this line is 1.

To find an equation representing a different line with the same slope, and passing through the point (3,6), we can use the point-slope form of the equation of a line:

y - y1 = m(x - x1)

where (x1, y1) is the given point, and m is the slope.

Substituting the values, we get:

y - 6 = 1(x - 3)

Simplifying, we get:

y - 6 = x - 3

or

y = x + 3

Therefore, the equation of the line with the same slope that passes through the point (3,6) is y = x + 3.

Step-by-step explanation:

The reflected over the line is = (4,0)

hence, as y=x by taking the symmetry= (4,0)

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The fundamental question addressed by the correlational method is whether two or more variables are related in some systematic way. So the correct option is D.

Correlational method is a research technique used to explore the relationship between two or more variables. In this method, researchers collect data on the variables of interest and analyze their patterns of association. The fundamental question addressed by the correlational method is whether two or more variables are related in some systematic way. This means that researchers are interested in exploring whether changes in one variable are associated with changes in another variable.

For instance, a researcher may be interested in exploring the relationship between stress and job performance. The researcher may collect data on the levels of stress and job performance in a sample of employees and then use statistical analysis to determine if there is a systematic relationship between the two variables. If the results show that higher levels of stress are associated with lower levels of job performance, then the researcher can conclude that there is a negative correlation between the two variables.

It is important to note that correlation does not imply causation. While a correlation between two variables indicates that they are related, it does not necessarily mean that changes in one variable are causing changes in the other variable. Therefore, researchers must be cautious when interpreting correlational data and should consider other factors that may be influencing the relationship between variables.

Therefore, the fundamental question addressed by the correlational method is whether two or more variables are related in some systematic way, and researchers must be cautious when interpreting correlational data and should consider other factors that may be influencing the relationship between variables.

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The width of the larger cell phone: \(W_{2}=\frac{(W_{1} *L_{2})}{L_{1} }\)

Length is a measure of the size of an object in one dimension. It refers to the distance between two points, usually measured in units such as meters, feet, inches, or centimetres.

Width is a measure of the size of an object in one dimension, specifically the distance between its two sides that are parallel to each other. It is usually considered the shorter of the two dimensions, the other being length.

Since the length and width of the two cell phones are proportional, we can express this relationship using a proportion. Let \(L_{1}\) and \(W_{1}\) be the length and width, respectively, of the smaller cell phone, and let \(L_{2}\) and \(W_{2}\) be the length and width, respectively, of the larger cell phone. Then we have:

\(\frac{L_{1} }{W_{1} } =\frac{L_{2} }{W_{2} }\)

We can rearrange this equation to solve for the width of the larger cell phone:

\(W_{2}=\frac{(W_{1} *L_{2})}{L_{1} }\\\)

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Answer:

B

Step-by-step explanation:

(hx)(gx)

(2x+5)(3x+2)

6\(x^{2}\)+4x+15x+10

6\(x^{2}\)+19x+10

Answer B

According to 43% of eighth graders, they spend more than an hour a day on social media.

A ratio stated as a fraction of 100 is what is meant by the term %. Students were asked in a poll if they thought they spent more or less time per day on social media.more less , 7th 12 14 , 8th 20 ,26 . The number of students who responded "more" must be divided by the total number of 8th graders polled in order to arrive at the %, which must then be multiplied by 100.

This percentage is the proportion of 8th graders who believe they spend more than an hour each day on social media.Twenty of the forty-six students (20+26) responded "more," or roughly 43.48 percent. As a result, 43% of eighth graders claim to spend more than an hour every day on social media.

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Interval estimation is a statistical technique used in estimating parameters. It involves constructing a range, or interval, within which the true value of a population parameter is likely to lie. This interval provides a measure of uncertainty associated with the estimate.

In statistical inference, interval estimation is used to estimate unknown population parameters, such as the population mean or proportion, based on sample data. Instead of providing a single point estimate, interval estimation provides a range of values that is likely to contain the true parameter value.

The process of constructing an interval estimate involves selecting a confidence level, typically expressed as a percentage, which represents the level of confidence that the interval contains the true parameter value. Common confidence levels include 90%, 95%, and 99%. The confidence level is chosen by the researcher based on the desired level of certainty.

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It will be doubled, Because the surface area is getting bigger as the dimensions get bigger.

Answer:

16) x = 32 degrees

17) x = 22 degrees

(A) The NSPE fundamental canons of ethics violated by engineer John are Canon 1: Engineers shall hold paramount the safety, health, and welfare of the public, and Canon 4: Engineers shall avoid deceptive acts.

Engineer John had violated the NSPE fundamental canons of ethics in his actions against his employer. His act of reporting the employer's unethical behavior is a commendable act as it reflects his respect for Canon 1, which states that engineers should prioritize public safety, welfare, and health.

He had reported his employer's illegal act of using the software on multiple workstations to the radio channel's hotline, even though his employer might be jeopardizing his own job safety.

Engineer John also broke Canon 4, which requires engineers to prevent fraudulent practices and avoid misleading acts that can harm the public.

His manager's act of using the software on multiple workstations without paying the licensing fee was fraudulent, and engineer John's report protected the company's ethics, preventing them from getting into trouble. He showed loyalty to his employer by following the ethical principles and guidelines.

Engineer John's actions were ethical and commendable. He had the courage to follow his principles and respect the NSPE fundamental canons of ethics. He did not allow his employer's illegal act to jeopardize public safety, welfare, and health. He showed his loyalty to his employer by protecting their reputation and guiding them towards the right path of ethics.

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