Sidney skated for 1 1/10 hours last month and 8 7/10 hours this month. How many
hours did Sidney skate in all?

Answer:

(0,0) and (6,12)

Step-by-step explanation:

8x - x^2 = 2x

8x -2x -x^2 =0

6x -x^2 = 0 then factor out a common x

x (6-x) = 0

so x =0 or 6-x=o

x=6

so if x=o y=2x=2(0)=0

and if x=6 y =2x =2(6)= 12

Answer:

this is the answer for the last one

Step-by-step explanation:

the answer is D) y=|x|+1

Sorry but i dont really know how to do the first two, good luck!!

To compute the determinant of the given matrix using cofactor expansions, we can choose the row or column that involves the least computation at each step.

In this case, it is beneficial to choose the second row for expansion. By expanding along the second row, we can simplify the computation and reduce the number of terms. After applying cofactor expansions, the determinant of the matrix is -460.

To compute the determinant, we will expand along the second row. The cofactor expansion formula for the determinant is given by:

det(A) = a₁₂C₁₂ - a₂₂C₂₂ + a₃₂C₃₂ - a₄₂C₄₂,

where aᵢⱼ represents the element in the i-th row and j-th column, and Cᵢⱼ represents the cofactor of the element aᵢⱼ.

Expanding along the second row, we have:

det(A) = 0(-1)^(2+2)det(B) - 0(-1)^(2+4)det(C) + 4(-1)^(2+6)det(D) - 0(-1)^(2+8)det(E),

where B, C, D, and E represent the submatrices obtained by removing the second row and the corresponding column.

Simplifying further, we obtain:

det(A) = 0 - 0 + 4(-1)^8(3(4(3) - 0(2)) - 5(3(6) - 0(5))) - 0,

det(A) = 4(3(4(3)) - 5(3(6))),

det(A) = 4(36 - 90),

det(A) = -216.

Therefore, the determinant of the given matrix is -460.

To learn more about determinant; -brainly.com/question/29898039

#SPJ11

As per the given standard deviation, the confidence interval is 495.84, upper bound is $65,495.8 and the lower bound is $64,504.2

Confidence interval

Confidence interval means a range of values, bounded above and below the statistic's mean, that likely would contain an unknown population parameter.

Given,

A student at another business school surveys 100 of 1000 graduates from last year and asks about their salaries. the researcher finds that the average income is $65, 000, with a standard deviation of $8000.

Here we need to find the confidence interval lower and upper bounds if you wanted to be 95% sure that the real mean of all 1000 students is within a range of the sample mean.

While we looking into the given question, we have identified the following values,

standard deviation = $8,000

Average income = $65,000

Sample size = 1000

Confidence level = 95%

Then the value of confidence interval is calculated by the formula,

Then we get the value of

Lower bound = 64504.2

Upper bound = 65495.8

Confidence interval (±) = 495.84

To know more about Confidence interval here.

https://brainly.com/question/24131141

#SPJ4

Hey there!

ASSUMING

2/5 * 5/9

CONVERTING #1

= 2(5) / 5(9)

= 10/45

CONVERTING #2

= 10 ÷ 5 / 45 ÷ 5

= 2 / 9

MET THE ANSWER

= 2/9

Therefore, the answer should be: 2/9

Good luck on your assignment & enjoy your day!

~Amphitrite1040:)

Answer:

Step-by-step explanation:

Total length of dive is the sum of the distances above the water and below the surface:

Aggregate Demand (AD) is a macroeconomic concept that represents the total demand for goods and services in an economy. The X factor in the AD equation represents exports, which are an important part of the economy.

AD is calculated by adding up the individual components of demand, which include consumer spending (C), investment spending (I), government spending (G), and net exports (X-M). The X-M component represents the difference between exports (X) and imports (M).

The X component in the equation represents exports, which are the goods and services produced domestically and sold to foreign countries. Exports are an important part of the economy as they generate income and create jobs. The M component in the equation represents imports, which are the goods and services purchased from foreign countries and consumed domestically. Imports can have a negative impact on the economy as they represent a drain on resources and can lead to a trade deficit. The X factor in the equation is used to represent exports because it is a variable that can change over time. Factors that can affect exports include exchange rates, tariffs, and global demand for certain products. If the exchange rate between two currencies changes, it can make exports more or less expensive for foreign buyers, which can affect the level of exports. Tariffs are taxes on imports, which can make domestic products more competitive in foreign markets.

To know more about Aggregate Demand visit :-

https://brainly.com/question/29349235

#SPJ11

Answer: 20%

Step-by-step explanation:

The ratio of the number of tickets sold by Jake to the number of tickets sold by Jeanne in the simplest form, will be 4:3

The ratio of the number of tickets sold by Jake to the number of tickets sold by Jeanne is 28:21.

To simplify this ratio, we can divide both numbers by their greatest common factor (GCF). The GCF of 28 and 21 is 7.

So, the simplified ratio is 28/7: 21/7 = 4:3

So the ratio of the number of tickets sold by Jake to the number of tickets sold by Jeanne is 4:3 in simplest form.

Learn more about ratios here: https://brainly.com/question/12024093

#SPJ4

Answer:

C

Step-by-step explanation:

The height of the door is given as 10 feet. The bottom 1/2 has a height of 5 feet.

The width of one door = 12/2 = 6 feet.

The value for x^2 = 5^2 + 6^2

x^2 = 25 + 36

x^2 = 61

sqrt(x^2) = sqrt(61)

x = 7.81

The closest value = 8

Answer:

hi

Step-by-step explanation:

20

Answer:

20................................

The probability of a majority of the advisory board opposes to funding is 0.352

Two events are said to be independent of each other if the probability that one event occurs in no way affects the probability of the other event occurring .If A and B are independent events then the probability that they all occur is given by P(A) x P(B)

Here, the opinions of the three students on the board are independent the probability is 0.4 that each opposes the funding of interest groups

Mjority of the board opposes can be when two or more members oppose it.

P(ABC) = P(A) x P(B) x P(C)

P(ABC) = 3 (0.6) x 0.4 x 0.4 + 0.4 x 0.4 x 0.4

= 0.288 + 0.064

= 0.352

Therefore, the probability of a majority of the advisory board opposes to funding is 0.352

To learn more about probability refer here

https://brainly.com/question/24756209

#SPJ4

The maximum value attained by the sum of the expression is 169 when N is the two-digit number 98.

Let N be a two-digit number with digits a and b. Then, the sum of N and the product of its digits is N + ab, and the sum of N's digits is a + b. Therefore, the expression we want to maximize is:

Substituting N = 10a + b, we get:

To maximize this expression, we want to maximize a and b. Since a and b are digits, they must be between 1 and 9. If we set a = 9 and b = 8, we get:

Therefore, the maximum value attained by the expression is 169 when N is the two-digit number 98.

Learn more about sum

https://brainly.com/question/25734188

#SPJ4

As a claims handler, Maria is responsible for managing and processing claims submitted by customers or clients. This role involves handling various types of claims, such as insurance claims, warranty claims, or product return claims, depending on the nature of the business.

In this capacity, Maria's ongoing work as a claims handler involves receiving and reviewing claim submissions, verifying the validity of the claims, gathering necessary documentation or evidence to support the claims, and assessing the coverage or liability.

She acts as a liaison between the customers and the organization, ensuring that the claims process is smooth and efficient. Maria may also need to investigate the circumstances surrounding the claims and make decisions on the appropriate course of action, such as approving or denying claims or negotiating settlements.

Additionally, she may be responsible for documenting and maintaining records of claims, communicating with customers to provide updates or resolve any issues, and ensuring compliance with applicable regulations and policies.

Overall, as a claims handler, Maria plays a crucial role in providing timely and fair resolutions to customer claims, maintaining customer satisfaction, and protecting the interests of the organization.

Learn more about Claims handler here:

brainly.com/question/30557130

#SPJ11

Given relation between height and time is:

Now put the value of h=85 ft in given relation:

Solving it for t:

The only claim that would tend to be refuted by the 90% confidence interval of 135 to 160 is B) The population mean is 125.

The 90% confidence interval for the mean of a population being computed to be 135 to 160 means that if we were to take multiple samples from the population and compute the mean of each sample, 90% of the intervals we construct would contain the true population mean. Therefore, any claim that falls outside of this interval would tend to be refuted.

Let's consider the options.

A) The population mean is 145.
This claim falls within the 90% confidence interval of 135 to 160, so it is not refuted by the interval.

B) The population mean is 125.
This claim falls outside of the 90% confidence interval of 135 to 160, so it is refuted by the interval.

C) The population mean is 170.
This claim also falls outside of the 90% confidence interval of 135 to 160, so it is refuted by the interval.

D) The population mean is between 130 and 150.
This claim falls within the 90% confidence interval of 135 to 160, so it is not refuted by the interval.

Therefore, the only claim that would tend to be refuted by the 90% confidence interval of 135 to 160 is B) The population mean is 125.
A 90% confidence interval for the mean of a population, computed to be 135 to 160, provides a range in which we can be 90% confident that the true population mean lies. This confidence interval helps us make inferences about the population based on sample data. The given interval would tend to refute any claim that falls outside of this range.

For example, if someone claims that the population mean is either below 135 or above 160, this confidence interval would challenge that assertion. Since we are 90% confident that the true population mean falls between 135 and 160, it would be statistically unlikely for the actual mean to be outside of this range. In conclusion, any claim suggesting a population mean outside the 135 to 160 interval would be refuted by this 90% confidence interval.

To learn more about confidence interval, click here:

brainly.com/question/24131141

#SPJ11

Complete question: For the problem, select the best response.

A 90% confidence interval for the mean of a population is computed to be 135 to 160. Which one of the following claims would the interval tend to refute?

A. The population mean is more than 110.

B. The population mean is less than 150.

C. The population mean is between 140 and 150.

D. The population mean is more than 140.

E. The population mean is less than than 125.

Answer : the answer is 5 people per T-shirt

Step-by-step explanation: because its 5 people per 1 T-shirt

Given :

The square of a number, x, is 16 less than eight times the number.

To Find :

The value of x .

Solution :

The mathematical equation with all given data is :

\(x^2=8x-16\\\\x^2-8x+16=0\\\\x^2-4x-4x+16=0\\\\x(x-4)-4(x-4)=0\\\\(x-4)^2=0\\\\x=4\)

Therefore , the value of x is 4 .

Hence , this is the required solution .

The number is 4.

Given that,

Based on the above information, the calculation is as follows:

\(x^2 = 8x - 16\\\\x^2 - 8x + 16 = 0\\\\x^2 -4x - 4x + 16 = 0\\\\x (x - 4) - 4(x - 4) = 0\\\\(x - 4)^2 = 0\\\\x = 4\)

Learn more: https://brainly.com/question/1605083?referrer=searchResults

Answer:

x>-5

Step-by-step explanation:

12x-10>10x-20

2x-10>-20

2x>-10

x>-5

Answer:  C. c = 23d + 11

I'm gonna go with c = 23d + 11

Step-by-step explanation:  c = 23d + 11

kikdddd

17 answers

2K people helped

its c hope that helps text me back if you want to know why it is.

...................................................................................................................................................

c is your answer

hope this helps

To find the vector projv u, you can use the formula: (v⋅u / |v|²) * v.

To find v⋅u (the dot product of v and u), you can multiply the corresponding components of v and u and then add the results.

To find |v| (the magnitude or length of v), you can use the Pythagorean theorem. Square each component of v, add the results, and take the square root of the sum.

Similarly, to find |u| (the magnitude or length of u), you can use the same process as above.

To find the cosine of the angle between v and u, you can use the dot product formula: cosθ = (v⋅u) / (|v| * |u|).

To find the scalar component of u in the direction of v, you can use the formula: (v⋅u) / |v|.

Lastly, to find the vector projv u, you can use the formula: (v⋅u / |v|²) * v.

Remember to plug in the values for v and u to get the specific results for each exercise.

Know more about magnitude here:

https://brainly.com/question/31022175

#SPJ11

Answer:

3x=4

Step-by-step explanation:

3x+3=7

3x=4

Answer: midpoint=(3,6)    distance of AB=2√5

Step-by-step explanation:

\(\displaystyle\\A(2,4)\ \ \ \ B(4,8)\\\boxed {the\ midpoint\ C_x=\frac{x_A+x_B}{2} }\\Hence,\\C_x=\frac{2+4}{2} \\\\C_x=\frac{6}{2} \\\\C_x=3\\\)

\(\displaystyle\\\boxed {the\ midpoint\ C_y=\frac{y_A+y_B}{2} }\\Hence,\\C_x=\frac{4+8}{2} \\\\C_x=\frac{12}{2} \\\\C_y=6\\Thus,\ \ (3,6)\)

\(\displaystyle\\\\\boxed {L_{AB}=\sqrt{(x_B-x_A)^2+((y_B-y_A)^2} }\\\\L_{AB}=\sqrt{(4-2)^2+(8-4)^2} \\\\L_{AB}=\sqrt{2^2+4^2} \\\\L_{AB}=\sqrt{4+16} \\\\L_{AB}=\sqrt{20} \\\\L_{AB}=\sqrt{4*5} \\\\L_{AB}=\sqrt{2^2*5}\\\\L_{AB}=2\sqrt{5}\)

im pretty sure the 9 is 1000 times the value

Vertex: The vertex of the function is at the point (-2, 3).

The domain of a function is the set of all possible input values (often represented as x) for which the function is defined. In other words, it is the set of all values that can be plugged into a function to get a valid output. The domain can be limited by various factors such as the type of function, restrictions on the input values, or limitations of the real-world scenario being modeled.

The range of a function refers to the set of all possible output values (also known as the dependent variable) that the function can produce for each input value (also known as the independent variable) in its domain. In other words, the range is the set of all values that the function can "reach" or "map to" in its output.

In the given question,

Domain: The domain of the function is all real numbers greater than or equal to -2, since the square root of a negative number is not defined in the real number system.

Range: The range of the function is all real numbers less than or equal to 3, since the maximum value of the function occurs at x=-2, where f(x)=3.

Vertex: The vertex of the function is at the point (-2, 3).

Four additional points:When x=-1, f(x)=-(√(-1)+2)+3 = -1, so (-1,-1) is a point on the graph.

When x=0, f(x)=-(√0+2)+3 = 1, so (0,1) is a point on the graph.

When x=1, f(x)=-(√1+2)+3 = 2, so (1,2) is a point on the graph.

When x=4, f(x)=-(√4+2)+3 = -1, so (4,-1) is a point on the graph

To know more about Graphs, visit:

https://brainly.com/question/17267403

#SPJ1

Answer:99

Step-by-step explanation:

1/2 x18x11

99

The 2 hour exam is the retrieval interval

In the scenario you described, the retrieval interval is two weeks, as there is a two-week gap between the lecture and the exam. During this time, the students have had a chance to study and review the material on their own before being tested on it.

Retrieval intervals can have a significant impact on memory retention and retrieval. Research has shown that longer retrieval intervals can lead to better long-term retention of information, as they allow for more opportunities for retrieval practice and consolidation of memory traces.

Read more on retrieval interval here:https://brainly.com/question/479532

#SPJ1

The test statistic for the two-proportion z-test comparing the proportion of women in biology and mathematics is 3.796.

To test if there is a significant difference in the proportion of women in biology and mathematics, we can perform a two-proportion z-test. Here are the steps to calculate the test statistic

Null hypothesis (H0), The proportion of women in biology is equal to the proportion of women in mathematics.

Alternative hypothesis (Ha), The proportion of women in biology is higher than the proportion of women in mathematics.

Calculate the proportions:

For biology: p1 = 210/361 = 0.581

For mathematics: p2 = 34/86 = 0.395

Calculate the pooled proportion

p = (p1n1 + p2n2) / (n1 + n2)

p = (0.581 * 361 + 0.395 * 86) / (361 + 86) = 0.543

Calculate the standard error

SE = √((p * (1 - p) * (1/n1 + 1/n2)))

SE = √((0.543 * (1 - 0.543) * (1/361 + 1/86))) = 0.049

Calculate the test statistic

z = (p1 - p2) / SE

z = (0.581 - 0.395) / 0.049 = 3.796

The test statistic is 3.796.

Determine the p-value

The p-value is the probability of observing a test statistic as extreme as 3.796, assuming the null hypothesis is true. The p-value can be looked up in a standard normal distribution table or calculated using statistical software.

Compare the p-value with the significance level (α) to make a decision:

If the p-value is less than α (commonly 0.05), we reject the null hypothesis and conclude that there is a significant difference in the proportion of women in biology and mathematics.

If the p-value is greater than or equal to α, we fail to reject the null hypothesis and conclude that there is not enough evidence to suggest a significant difference.

The p-value and the specific decision based on it are not provided in the given information and require additional calculations or information.

To know more about p-value:

https://brainly.com/question/30461126

#SPJ4