NEED HELP ASAP!!!!

Given the function, find f(-1). f(x) =−3x+7?

The value of the decrease percentage of elephant weight is 15%.

A percentage is a value that indicates 100th part of any quantity. A percentage can be converted into a fraction or a decimal by dividing it by 100.

The original weight of elephant is 14000 pounds.

And, the drop in weight is 2100 pounds.

Now, the percent value of the drop in weight is calculated as follows

Percent drop = Drop in weight / Original weight × 100

⇒ 2100/14000 × 100

⇒ 15%

Hence, the percent of decrease in weight is given as 15%.

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Yes, all of the conditions for inference have been met to carry out a t-test for a difference in means.

Three main conditions need to be satisfied: the random condition, the 10% condition, and the Normal/large sample condition.

The random condition is met because the real-estate agent randomly assigned the homes to be staged or empty. This ensures that the sample is representative of the population of comparable homes.

The 10% condition is met because the agent selected 10 comparable homes, and the sample of 5 staged and 5 empty homes represents less than 10% of the population of comparable homes.

The Normal/large sample condition is met because the dot plot of each sample shows no strong skewness and no outliers. Additionally, with a sample size of 5 for each group, the t-test can still be valid even if the population distributions are not exactly normal.

Therefore, all the conditions for inference have been met, allowing the real-estate agent to carry out a t-test for a difference in means and test the hypothesis regarding the selling prices of staged and empty homes.

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The equation that represents the total cost of the membership will be y = 5x + 265.

A connection between a number of variables results in a linear model when a graph is displayed. The variable will have a degree of one.

The linear equation is given as,

y = mx + c

Where m is the slope of the line and c is the y-intercept of the line.

A local rec center offers a yearly membership for $265. The center offers aerobics classes for an additional $5 per class.

Let 'x' be the number of aerobics classes and 'y' be the total cost. Then the equation is given as,

y = 5x + 265

The equation that represents the total cost of the membership will be y = 5x + 265.

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Answer:

1. 5(a-6) = 5a-30

2. 2(3a-b) = 6a-2b

3. 5(-5x+3) = -25x+15

4. -(2c+3) = -2c-3

Both of their first step are correct (Show your calculations to explain)

x-9 = 5

x = 14

2x-18 = 10

2x = 28

x = 14

Step-by-step explanation:

All Above

The difference between the area of the rectangle and the area of the triangles is 56 units.

Area of the rectangle = 8 * 16

Area of the rectangle = 128 units

Area of triangle 1 = ¹/₂ * 4 * 12

Area of triangle 1 = 24 units

Area of triangle 2 =  ¹/₂ * 4 * 16

Area of triangle 2 = 32 units

Area of triangle 2 =  ¹/₂ * 4 * 8

Area of triangle 2 =  16 units

Area of rectangle - area of triangle = 128 - ( 24 + 32 + 16)

Area of the rectangle - the area of the triangles = 56 units

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Step 1: Isolate the Sin Operator

\(8 sin(\frac{\pi }{6} x)=2\\sin(\frac{\pi }{6} x)=0.25\\\\\)

Step 2: Use Inverse Sin(arcsin) to isolate the term with the x variable

Note that since trig functions have 2 general solutions, this will give us one of our general solutions.

\(x=\frac{6 arcsin(0.25)}{\pi } =0.48\)

x₁= 0.48

Solving for x₂

Use the period identity for Sin Functions

\(sin(x)=sin(\pi -x)\)

X in this case is arcsin(0.25)

\(\frac{\pi }{6} x=\pi -arcsin(0.25) = 5.52\)

So our two general solutions are 0.48 and 5.52

Step 3: Period

Trig Functions have periodic behavior and this function period is

\(\frac{2\pi }{1} (\frac{6}{\pi } )= 12\)

So our general solutions are

0.48±12k, where k is an integer

5.52±12k, where k is an integer

Let k=1, and we get our next set of solutions:

12.48 and 17.52

So our answer is 0.48,5.52,12.48,17.52

Answer:

Here are the steps for conducting a survey in your school to find out which mode of transportation students prefer the most, arranged in order from start to finish:

1) Define the objective: Clearly define the objective of the survey, which is to determine the preferred mode of transportation among students in your school.

2) Determine the sample size: Decide on the number of students you want to include in your survey. This will depend on factors such as the size of your school and the resources available for conducting the survey.

3) Design the survey questionnaire: Create a well-designed survey questionnaire that includes relevant questions about different modes of transportation. Ensure that the questions are clear, unbiased, and cover all the necessary aspects.

4) Seek necessary permissions: If required, seek permission from school authorities or relevant individuals to conduct the survey on school premises and to involve students.

5) Pre-test the survey: Before distributing the survey to the entire student population, pre-test the questionnaire on a small group of students to identify any potential issues or areas for improvement.

6) Distribute the survey: Once the questionnaire has been finalized and pre-tested, distribute it to the selected sample of students. Ensure that the survey is distributed in a fair and unbiased manner, taking into account the diversity of the student population.

7) Collect the survey responses: Set a specific timeframe for students to complete the survey and collect the responses. Consider using a combination of online platforms and physical collection methods to maximize participation.

8) Analyze the data: Once you have collected all the survey responses, analyze the data to determine the preferred mode of transportation among students. Use appropriate statistical tools and techniques to interpret the results accurately.

9) Present the findings: Prepare a report or presentation summarizing the survey findings. Include key insights, trends, and any significant findings related to the preferred mode of transportation among students.

10) Share the results: Share the survey results with the school community, including students, teachers, and administrators. This can be done through presentations, newsletters, or other suitable communication channels.

By following these steps, you will be able to conduct a comprehensive survey to determine the preferred mode of transportation among students in your school.

Hope this helps!

I can not do it for you but I can give you what you should do

Explanation: take a survey

Answer:

H0: μ = 16.5; Ha: μ > 16.5, which is a right-tailed test.

Step-by-step explanation:

Given that:

the population mean μ = 16.5

the sample size n = 20

the sample mean \(\mathbf{\overline x}\) = 17.3

the standard deviation σ = 2.1

level of significance = 0.10

The objective is to choose from the given options, the correct option that state the null hypothesis and the alternative hypothesis.

Given that; we want to determine if the mean amount of time they watch social media posts per month is greater than the mean amount of time last year, then we can say that the test is right-tailed.

Hence, the null hypothesis and alternative hypothesis can be computed as:

The null hypothesis:

\(\mathbf{H_o: \mu = 16.5}\)

The alternative hypothesis:

\(\mathbf{H_1 : \mu > 16.5}\)

Therefore, the fourth option is the right answer.

Answer: 34 meters.

Step-by-step explanation;

Step One. Find the value of the width. Use an equation with w representing the width and the two values you already have. 9 meters x w = 72 square meters.

Step Two. Solve for width. This is w = 8.

Step Three. Use the value for width in a perimeter formula to calculate the perimeter; 9(2) + 8(2). This is 34 meters for perimeter.

Answer:

Hi

Step-by-step explanation:

Answer:

x - 2

Step-by-step explanation:

First, we know that the area of a triangle can be found using the formula: a = 1/2(bh).

We also know that the area of this triangle can be represented by (x^2-4).

Lastly, we know that one of the legs (let's call it the base) can be represented by (2x+4).

Let's plug in those values to the original formula: x^2 - 4 = 1/2(2x + 4)h

Now, let's solve for h!

We can multiply both sides by 2, then divide each side by (2x + 4) to isolate/solve for h.

If you need help on dividing polynomials, feel free to reach out!! I'd be happy to explain.

h = (x - 2)

The percent decrease in total principal and interest paid between a 30-year term mortgage and a 15-year mortgage with a principal balance of $484,500.00 and a 6.5% APR is 31.0%. (Option A)

To calculate the  percent decrease, we can use the following formula.

Percent decrease = ( (30-year factor -   15-year factor) / 30-year factor) x 100

Substituting the values from the chart.  

= (($ 6.65 - $8.71) / $6.65) x 100

= ( -$ 2.06 / $6.65) * 100

= -0.309 *  100

Percent decrease ≈ - 30.9 %

Since the question asks for the percent decrease as a positive value, we take the absolute value of the result which is

Percent decrease ≈ 31%

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Answer:

4x + (-2) = -2x+6

Step-by-step explanation:

im not gonna explain a diagram but it won't let me submit.

The person is looking at each peak on a leg of a right triangle. The hypotenuse is the distance between the mountains.

The distance is determined by

x^2+(x+5)^2=25^2

x^2+x^2+10x+25=625

2x^2+10x-600=0

x^2+5x-300=0

(x+20)(x-15)=0

only positive root is x=15

x+5=20

The vista point is 15 miles from one mountain peak and 20 miles from the other.

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Based on the information given, the null hypothesis states that the newscast reaches 41% of the viewing audience, while the alternate hypothesis states that it does not reach 41% of the audience. So, the correct answer is d. Fail to reject the null hypothesis.

To determine the decision, we need to perform a hypothesis test using the given significance level α = 0.01. This significance level represents the maximum acceptable probability of making a Type I error, which is rejecting the null hypothesis when it is actually true.

In the survey of 100 viewers, 36% indicated that they watch the late evening news on the local CBS station. To test the hypothesis, we can use a one-sample proportion test. We compare this sample proportion to the claimed 41% to see if there is a significant difference.

Using a statistical calculator or software, we calculate the p-value associated with the observed sample proportion. If this p-value is less than α (0.01), we reject the null hypothesis. If the p-value is greater than or equal to α, we fail to reject the null hypothesis.

Based on the decision criteria, if the p-value is less than 0.01, we would reject the null hypothesis and conclude that the newscast does not reach 41% of the audience. However, if the p-value is greater than or equal to 0.01, we would fail to reject the null hypothesis. To summarize, the correct decision, given α = 0.01, would be d. Fail to reject the null hypothesis.

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Explanation:

We have two rules we need to follow:

Through trial and error, you should find that this works for angle FGH and angle LJM

Note how 124+56 = 180 to show that the angles are supplementary. If they were combined together, then we could form a straight line. However, they aren't touching or combined since they are part of two separate figures. So that's why we consider them nonadjacent angles.

Answer:the answer is B

Step-by-step explanation:

By constructing 95% confidence intervals for each simulation, we can be 95% confident that the true proportion of wins lies within the range of each interval.

A confidence interval is a set of values that, given a specific level of certainty, are likely to include a population parameter like a mean or proportion.

The interval is derived using data drawn from a sample of the population and is frequently presented as a range of values with a 95% confidence level.

The probability that the range of values contains the genuine population parameter is quantified by the confidence level.

In the case of a 95% confidence interval, for instance, it means that 95% of the intervals would contain the real population parameter if we sampled the same population more than once and calculated a confidence interval each time.

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Answer:

Bicycle : $117

Tricycle : $87

Unicycle : $183

Step-by-step explanation:

Write a system of equations:

x + 3y + z = 561

7x + y = 906

2x + 7y + 5z = 1758

Where:

x = price of bicycle

y = price of tricycle

z = price of unicycle

Solve for x, y, and z.

Answer:

85+75+160=v

Step-by-step explanation:

correct answer

Answer: 20

Step-by-step explanation:

Using the binomial distribution, the probabilities are given as follows:

a) 0.37 = 37%.

b) 0.5065 = 50.65%.

c) 0.3260 = 32.60%.

The formula is:

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

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

The parameters are:

For this problem, the fixed parameter is:

p = 0.37.

Item a:

The probability is P(X = 1) when n = 1, hence:

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

\(P(X = 1) = C_{1,1}.(0.37)^{1}.(0.63)^{0} = 0.37\)

Item b:

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

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

\(P(X = 3) = C_{3,3}.(0.37)^{3}.(0.63)^{0} = 0.5065\)

Item c:

The probability is P(X = 2) when n = 4, hence:

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

\(P(X = 2) = C_{4,2}.(0.37)^{2}.(0.63)^{2} = 0.3260\)

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Answer: 12

Step-by-step explanation:

Answer:

The hypothesis test is right tailed because of claim made by SEO account manager that a web page on average has more than 10 keywords.

Step-by-step explanation:

The given hypothesis test is right tailed due to the claim made by SEO account manager. The tail of hypothesis test decided by looking at alternative hypothesis. The claim stated as " a web on average has more than 10 keywords" and this leads to alternative hypothesis as

Ha:μ>10.

The alternative hypothesis shows the greater than area or also known as right tailed area. Thus, given hypothesis test is right tailed.

The roster method of the set X ∪ (Y ∩ Z) = {p, q, r, s, 21, 22, 23, 25}

The roster method is defined as a way to show the elements of a set by listing the elements inside of brackets.

A typical example of the roster method is to write the set of numbers from 1 to 5 as {1, 2, 3, 4, 5}.

Therefore,

X = {p, q, r, 21, 22, 23}

Y = {q, s, t, 21, 23, 25}

Z = {q, s, 22, 23, 25}

Therefore, let's find X ∪ (Y ∩ Z) as follows:

(Y ∩ Z) = {q, s, 23, 25}

X = {p, q, r, 21, 22, 23}

Therefore,

X ∪ (Y ∩ Z) = {p, q, r, s, 21, 22, 23, 25}

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Answer:

(-1/2,-3)

Step-by-step explanation:

(-7,-9) =x1, y1

(6,3) = x2, y2

now,

Mid point= x1+x2 /2 , y1+y2 /2

= -7+6 /2, -9+3 /2

= (-1/2 , -3)

Answer:

1. ) Point Y

2.) Side YX, Side YZ

3.) Point X

4.) Side XZ

Hope this helps!

Answer:

find the area of each figure

The equivalent value of the expression ( 56p - 24 ) ÷ 8 is 7p - 3.

Given data:

The expression is represented as A.

Now, the value of A is \(A=\frac{( 56p - 24 ) }{8}\).

On simplifying the equation:

\(A=\frac{56p}{8}-\frac{24}{8}\)

On dividing each term by 8:

\(A=7p-3\)

Therefore, the value of A is 7p - 3.

Hence, the expression is A = 7p - 3.

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Given:

\(y = \frac{1}{2}x^2\\\)

Please refer to the attached image for the answer.