Help me pleaseeeeeeeeeeee I'll mark brainliest just help me asap

Answer : 6

Step-by-step explanation:

Answer:

27.8

Step-by-step explanation:

You need to do brackets first

3.6-1.8 = 1.8

Then substitute

4.5 x 8- (0.4 + 9.6- 1.8)

0.4+9.6-1.8=8.2

4.5 x 8 - 8.2 =27.8

Answer:

a coin with one side representing a win and the other representing a loss

Step-by-step explanation:

Answer:

C: a 5-section spinner with congruent sections, 3 representing a win and 2 representing a loss

Step-by-step explanation:

edg2021

You simply have to simplify. 24 wins and 16 loses is equal to 3 / 2. So it is C.

It is not A (to the person who said it was a coin) and that is because it is not equal. There are more wins than losses.

Answer:

\(\displaystyle \frac{1}{10}(x+9)\)

Step-by-step explanation:

\(\displaystyle \frac{1}{10}x+\frac{9}{10}=\frac{1}{10}(x+9)\) because \(\displaystyle \frac{1}{10}(x+9)=\frac{1}{10}(x)+\frac{1}{10}(9)\) by the Distributive Property

Answer:

Step-by-step explanation:

The slope for the given situation will be $2.96. 5.92/2 = $2.96 per meal

According to the given information, the sample period should be from 2010-2020.

a) Model specification

The model specification based on the scenario above is as follows:

SDF= f(T, TI, NL)

Where: SDF= Sustainable Development Framework

T= Tourism

TI= Technological innovation

NL= National leadership

b) Justification for the selection of the dependent and independent variables model:

Dependent variable: The dependent variable in this model is Sustainable Development Framework (SDF). The model seeks to develop a framework for sustainable development that would facilitate growth, environmental and socio-cultural sustainability.

Independent variables:

The independent variables are tourism sustainability, technological innovation, and quality of leadership. These variables drive economic development. The inclusion of tourism sustainability reflects its importance in the global economy and its potential to drive growth.

The inclusion of technological innovation reflects its potential to enhance productivity and create new industries. The inclusion of national leadership reflects the role of governance in promoting sustainable development and managing negative externalities.

c) Justification for the selection of the sample period:

The sample period should be selected based on the availability of data for the variables of interest. Ideally, the period should be long enough to capture trends and patterns in the data. However, it should not be too long that the data becomes obsolete or no longer relevant.

Additionally, the period should also reflect the context and relevance of the research question. Therefore, the sample period for this study should cover the last decade to capture the trends and patterns in the data and reflect the relevance of the research question.

The sample period should be from 2010-2020.

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The true mean time it takes for her employees to mow a lawn would be captured by about 90% of the constructed intervals if numerous random samples of size 30 are chosen from the population of all customers.

Thanks.

Answer:

30 hours

Step-by-step explanation:

Ok, since it can make 60 cars in 6 hours we take the 300 divided by the 60 to get 5. Then, multiply the 5 by the 6 to get 30 hours.

.Answer:

The answer is 30 hours

Step-by-step explanation

60 x 5 = 300 cars produced

6 x 5= 30  hours it takes to produce 300 cars

b = 25 and ac = 100 should be filled in the top and bottom portions of the x respectively

How to factor a quadratic expression?

Given:  2x²+25x+50

The product (ac) of the expression is 2 x 50 = 100

The sum (b) is 20 + 5 = 25

Thus:

2x²+25x+50 = 2x²+20x + 5x+50

                     = (2x²+20x) + (5x+50)              

                      =  2x(x+10) + 5(x+10)             (Factorize)

                      =  (x+10) (2x+5)

The factors are (x+10) and (2x+5)

Therefore, b = 25 and ac = 100. 25 and 100 should be filled in the top and bottom of the x respectively

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The mean, median and mode of the data sets are 0.23, 0.19 and 0.12 respectively.

Mean, median and mode are measure of central tendency.

The mean is the average of the numbers.

The median is the middle number in a sorted, ascending or descending list of numbers.

The mode is the number that occurs the highest number of times.

Therefore, let's arrange the data in ascending order.

$0.12,  $0.12, $0.15, $0.17 , $0.18, $0.20, $0.24, $0.28, $0.29, $0.55

Hence,

mean = sum of the numbers / 10

mean = 0.12 + 0.12 + 0.15 + 0.17 + 0.18 + 0.20 + 0.24 + 0.28 + 0.29 + 0.55 / 10

mean = 2.3 / 10

mean = 0.23

median = 0.18 + 0.20 / 2

median = 0.38 / 2

median = 0.19

mode = 0.12

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Answer:

Step-by-step explanation:

Mean is 0.23, since you add all the numbers up, then divide by all the numbers there are.

For example, there are 10 numbers, and if you add all of the numbers together, you get 2.3.

2.3 divided by 10 is 0.23

I will get the median and modes later.

Answer:

1 < x < 17

Step-by-step explanation:

9, 8

Third side should be less than 9 + 8  = 17

And it should be greater than 9 - 8 = 1

Answer:

Overall price after service charge is 9.53

Step-by-step explanation:

8.5 is 10 percent

0.85 is one percent

0.85 multiplied by 2 is 1.70

Add the percentages together and you have 1.03

Then you add that onto the price of the original meal

Answer:

Tip: $1.02

Total: $9.52

Step-by-step explanation:

Vertical lines do not have positive slopes or negative slopes. They have undefined slopes.

Now, According to the question :

What is Vertical line?

A vertical line is a line, parallel to y-axis and goes straight, up and down, in a coordinate plane. Whereas the horizontal line is parallel to x-axis and goes straight, left and right.

Is a vertical line positive or negative?

The slope of a line can be positive, negative, zero, or undefined. A horizontal line has slope zero since it does not rise vertically (i.e. y1 − y2 = 0), while a vertical line has undefined slope since it does not run horizontally (i.e. x1 − x2 = 0).

Hence, Vertical lines do not have positive slopes or negative slopes. They have undefined slopes.

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Answer:

The initial height is 5 feet.

The initial velocity of the object is –72 feet/second.

The object will hit the ground after approximately 4.57 seconds.

After 3 seconds, the object is 173 feet high.

So t = 0, h(t) = 0

Step-by-step explanation:

Answer:

k <−33

Step-by-step explanation:

There are 11 members in the team

From the question, we have the following parameters that can be used in our solution:

Earnings of the team = $891

Amount received by each member = $81

From the above parameter, we can calculate the number of members using the following equation

The number of members is calculated as

Number of members = Earnings of the team/Amount received by each member

Substitute the known values in the above equation

So, we have the following equation

Number of members = 891/81

Evaluate the quotient

Number of members = 11

Hence, the number of members is 11

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The sampling variance of Spencer's estimator can be calculated using the formula for the variance of the sum or difference of two random variables.

In this case, Spencer's estimator is the average weight of the first and last apple, denoted as (X1 + Xn)/2.

The variance of the sum or difference of two independent random variables is the sum of their individual variances. Since the weights of the apples are independently distributed with mean µ and variance σ^2, the variance of each apple weight is σ^2.

To find the sampling variance of Spencer's estimator, we need to find the variance of (X1 + Xn)/2. Using the formula for variance, we can simplify the calculation as follows:

Var[(X1 + Xn)/2] = (1/4) * Var(X1 + Xn)

Since X1 and Xn are independent, the variance of their sum is the sum of their individual variances:

Var(X1 + Xn) = Var(X1) + Var(Xn) = 2σ^2

Plugging this back into the previous equation, we get:

Var[(X1 + Xn)/2] = (1/4) * 2σ^2 = σ^2/2

Therefore, the sampling variance of Spencer's estimator is σ^2/2.

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Answer:

it's either 6 or -6 because if uts Like negative and positive then it should be either one of those

Answer:

Step-by-step explanation:

34

Yes, infrared spectroscopy would indeed be helpful in determining,

if the dehydration reaction of cyclohexanol to form cyclohexene was successful in an organic chemistry lab.

Infrared spectroscopy (IR spectroscopy) is a widely used analytical technique in organic chemistry,

That provides information about the functional groups present in a compound.

It measures the absorption of infrared radiation by the sample,

Which corresponds to the vibrations of different chemical bonds in the molecule.

In the case of cyclohexanol and cyclohexene, there is a significant difference in their functional groups.

Cyclohexanol contains an -OH group alcohol, whereas cyclohexene contains a carbon-carbon double bond alkene.

These functional groups have characteristic absorption bands in the IR spectrum.

By comparing the IR spectra of the starting material cyclohexanol and the desired product cyclohexene.

One can determine if the dehydration reaction was successful.

The presence or absence of characteristic absorption bands for the alcohol (-OH) and the alkene (C=C).

In the product spectrum can provide evidence of the reaction's success.

If the desired cyclohexene is formed, the absorption band corresponding to the -OH group should disappear,

Indicating the removal of the alcohol functionality.

Additionally, a new absorption band corresponding to the C=C bond should appear in the product spectrum.

Therefore, IR spectroscopy can be a valuable tool in confirming the success of the dehydration reaction and characterizing the functional groups present in the resulting product.

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Answer:

y = -3x - 4

Step-by-step explanation:

Find the slope.

y2-y1/x2-x1

-9/3 = -3

-3 is the slope. You know the y-intercept is -4 since (0, -4) is a point. The y-intercept is the value of y where x = 0.

So if you know the slope is -3 and the y-intercept is -4, plug it into slope-intercept form.

y = mx+b

y = -3x - 4

The standard error of the sampling distribution of the sample mean is a measure of the variability of sample means that would be obtained from repeated sampling of the same population. It is calculated as the standard deviation of the sampling distribution of the sample mean.

In other words, the standard error reflects how much the sample means from different samples would be expected to vary from the true population mean. As the sample size increases, the standard error decreases because the sample means become more representative of the population mean. Conversely, as the sample size decreases, the standard error increases because the sample means become less representative of the population mean.

The formula for calculating the standard error of the sample mean is:

Standard Error = Standard Deviation / Square root of Sample Size

where the standard deviation is the variability of the population and the sample size is the number of observations in the sample.

The standard error is an important concept in statistical inference because it is used to calculate confidence intervals and hypothesis tests for population means based on sample means. A larger standard error indicates that there is more uncertainty in the estimate of the population mean, and a smaller standard error indicates that the estimate is more precise. In conclusion, the standard error of the sampling distribution of the sample mean is a measure of the variability of sample means that would be obtained from repeated sampling of the same population. It is a key concept in statistical inference and is used to calculate confidence intervals and hypothesis tests for population means based on sample means.

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Answer:

-12√3n

Step-by-step explanation:

We want to write this in its simplest form

48 = 16 * 3

√(48) = √16*3

√48 = 4 √3

so we have

-3 * 4 √3n

=

-12√3n

The measure of the angle of elevation is to the sun is 67 degrees

Information from the question

a 38 foot tree casts a 16 foot shadow

the measure of angle of elevation to the sun = ?

The measure of the angle of elevation is solved using SOH CAH TOA

The direction of the images describes a right angle triangle of

opposite = 38 foot

adjacent = 16 foot

The angle of elevation is calculated using tan, TOA let the angle be x

tan x = Opposite / Adjacent

tan x = 38 / 16

tan x = 2.375

x = arc tan 2.375

x = 67.1663 degrees

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Fitness mania is cheaper as $200 < $240

The probability that the speed is less than 80 kmph is 0.1587 (rounded to four decimal places).

The average speed of a car on the highway is 85 kmph with a standard deviation of 5 kmph.

Assume the speed of the car, x, is normally distributed.

The probability that the speed is less than 80 kmph is required.

We will use the Z-score formula to solve this problem.

Z-score formula:

Z = (X - μ) / σWhereX = 80 (the speed we are interested in)

μ = 85 (mean of the normal distribution)

σ = 5 (standard deviation of the normal distribution)

Z = (80 - 85) / 5 = -1

The Z-score for the speed of 80 kmph is -1.

Using the standard normal distribution table,

we find that the probability that the Z-score is less than -1 is 0.1587 (rounded to four decimal places).

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The area of the triangle with the given vertices is 2 square units.

Area =

Area = (1/2) |((-1)(4 - 8) + (0)(8 - 4) + (-2)(4 - 4))|

Area = (1/2) |(-1 * (-4) + 0 * (4) + (-2) * 0)|
Area = (1/2) |(4)|

Area = (1/2) * 4
Area = 2

So, the area of the triangle with the given vertices is 2 square units.

The area of the triangle with the given vertices is 2 square units.

To find the area of the triangle with the given vertices (-1, 4), (0, 4), and (-2, 8), follow these steps:

1. Label the vertices: A(-1, 4), B(0, 4), and C(-2, 8).

2. Use the Shoelace Formula to find the area:

Area = (1/2) * |[(xA * (yB - yC)) + (xB * (yC - yA)) + (xC * (yA - yB))]|

3. Plug in the coordinates of the vertices:

Area = (1/2) * |[(-1 * (4 - 8)) + (0 * (8 - 4)) + (-2 * (4 - 4))]|

4. Calculate the values inside the brackets:

Area = (1/2) * |[(-1 * (-4)) + (0 * 4) + (-2 * 0)]|

5. Continue calculating:

Area = (1/2) * |[4 + 0 + 0]|

6. Calculate the final area:

Area = (1/2) * 4 = 2

The area of the triangle with the given vertices is 2 square units.

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Answer:

250+15x=200+20x

Step-by-step explanation:

x=10

15x10=150+250=400

20x10=200+200=400

The equivalent expression is -1. 8h + 0.7

Algebraic expressions are defined as expression that are composed of variables, terms, coefficients, factors and constants.

They are also made up of arithmetic operations.

From the information given, we have that;

2.1 + (–3.7h) + 1.9h – 1.4

To simply this, we need to expand the bracket, we get;

2.1 - 3. 7h + 1.9h - 1.4

Now, collect the like terms, we get;

-3. 7h + 1. 9h + 2.1 - 1.4

Add or subtract the like terms

-1. 8h + 0.7

Hence, the expression is-1. 8h + 0.7

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Answer:

150

Step-by-step explanation:

Answer:

150cm

Step-by-step explanation: