how do you find the slope, I really need help.

Answer:

$6.00

Step-by-step explanation:

Total amount of money = 0.25q + 0.1d

where q is the number of quarters and d is the number of dimes

The problem states we have 18 quarters: d = 18

And that there are 15 dimes: d = 15

Plugging it in we get

= 0.25(18) + 0.1(15)

= 4.5 + 1.5

= 6.0

Answer:

C.y=-3x-3

Step-by-step explanation:

Answer:

in very simple form it would be 2y=-3x-12 in simple form

Step-by-step explanation:

plug in 2 for y and you get 2y then do distributive property and you get -3x-12

and therefore your equation is 2y=-3x-12

Answer:

6x+18

Step-by-step explanation:

Multiply 3 to all the numbers on the parenthesis

Hope this helps!

It would take Jimbo 24 minutes to solve a 3-variable substitution problem alone.

Let's assume that Jimbo takes x minutes to solve a 3-variable substitution problem alone.

We know that Jimmy takes 8 minutes to solve the same problem alone, so his work rate is 1/8 of the problem solved per minute.

Together, Jimbo and Jim Bob can solve the same problem in 6 minutes. This means that their combined work rate is 1/6 of the problem solved per minute.

We can set up the following equation to represent the work rates:

1/8 + 1/x = 1/6

To solve for x, we can multiply both sides of the equation by 24x:

3x + 24 = 4x

x = 24

Therefore, it would take Jimbo 24 minutes to solve a 3-variable substitution problem alone.

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Answer:

for number 1: y = 4

for number 2: k = -8

for number 3: d = 21

Step-by-step explanation:

Step-by-step explanation:

1. 7y=28

7÷7y=28÷7

y=4

2.-4k=40-8

-4k÷-4=32÷-4

k= -8

3. 47+5=2d

42=2d

42÷2=2d÷2

21=d

Answer with Step-by-step explanation:

Slope intercept form is y=mx+b where m is the slope and b is the y-intercept so all you have to do is plug in those values to solve

1) y = 5/2x + 5

2) y = -7/2x  - 5

3) y = -7x - 2

4) y = -2x + 5

5) y = -2x - 1

For these, you have to find slope and the y-intercept then plug in so to find the slope quickly and usually pretty easily I use a trick called rise over run. You find two points the line goes through then use rise over run to find the slope, so how much it rises -> how many y squares up or down it goes until the next point divided by how much it runs-> how many x boxes it goes over until the next point

once you find the values plug it in to get the equation

6) y = -x + 5

7) y = 2/5x + 3

8) y = 3/4x + 2

9) y = 1/8x + 5 (I can't see this graph very well so you can check it)

10) y = 1/4x -1

I hope this helps, I would really appreciate a heart/thanks, good rating and brainliest if possible please since I did all of them please and thank you so much! :)

Answer:

XZ = 12x + 6

Step-by-step explanation:

XZ = XY + YZ

XZ = 4x + 7 + 8x - 1

XZ = 12x + 6

The 85% confidence interval that the true mean number of words a third grader can read per minute is between 30.131 and 30.869.

To create a confidence interval for the mean number of words a third grader can read per minute, an educational psychologist wishes to know the mean number of words a third grader can read per minute. She intends to produce an estimate at an 85% level of confidence.

For a sample of 146 third graders, the mean words per minute read was 30.5. Assume a population standard deviation of 3.1.

To create a confidence interval, the following formula can be used:

µ±z_α/2*σ/√n

Here, we are given the following details:

Sample size: n = 146

Mean: µ = 30.5

Population standard deviation: σ = 3.1

Level of confidence: α = 1 - 0.85 = 0.15

We need to determine the critical value of z_α/2.

α/2 ⇒ 0.15/2 ⇒ 0.075

Using a standard normal distribution table, we find that the value of z_0.075 is 1.44.

Confidence Interval: µ ± z_α/2*σ/√n

⇒ 30.5 ± 1.44 × (3.1/√146)

⇒ 30.5 ± 0.369

Thus, the confidence interval for the mean number of words a third grader can read per minute is (30.131, 30.869).

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Step-by-step explanation:

comvert units into one unit

4ft 2in = 4 + 2/12 ft

3ft 4in = 3ft + 4/12ft

Know that the ratio of tan(x) = O / A

and set up proportions

\( \frac{ba}{ac} = \frac{h}{rt} \)

solve for h

Answer:

Step-by-step explanation:

assuming that the triangles are similar,  which I can't by what is shown in the picture, but I'm guessing that there are more instructions off screen , that say they are.

' = feet

" = inches

h / 20' = 4'-2" / 3'-4"

just use inches for this,  it's easier

h / 240" = 50" / 40"

h = 240 ( 50 / 40 )

h = 300"

h = 25'

Answer: Option B

She should use the fact that the

opposite sides of a parallelogram are

congruent and then use the

Pythagorean theorem.

We cannot use the diagonals of square property because this is a rectangle, opposite angles will also not work, and we cannot use the diagonal property because thats what we have to prove.

Must click thanks and mark brainliest

Answer:

-1 is the answer

Step-by-step explanation:

Answer:

-1 is the answer

Step-by-step explanation:

Hope this helps

Answer:

\(\frac{V}{wh}=l\)

Step-by-step explanation:

Equation: \(V=lwh\)

1). \(\frac{V}{wh}=\frac{lwh}{wh}\)

2). \(\frac{V}{wh}=l\)

If the outdoor temperature were recorded every hour for 4 consecutive hours, the ordered pairs for each point would be different. Currently, the given ordered pairs represent the outdoor temperature recorded at every 2-hour interval.

However, if the temperature were recorded every hour, there would be a total of 4 temperature readings, each separated by an hour. This means that the ordered pairs would include an additional set of numbers, representing the additional temperature readings. For instance, the first ordered pair (1,61) indicates that the outdoor temperature was 61 degrees Fahrenheit at hour 1. If the temperature were recorded every hour for 4 consecutive hours, the ordered pairs would be (1,61), (2,?), (3,65), (4,?), (5,71), (6,?), (7,75), (8,?), (9-77). In this case, the temperature readings at hours 2, 4, 6, and 8 are unknown and would need to be recorded in order to generate the corresponding ordered pairs.
The difference in the ordered pairs would also reflect the changes in temperature over shorter intervals of time. By recording the temperature every hour, we would be able to track any fluctuations in temperature that might occur within the 2-hour interval between the given ordered pairs. For example, if the temperature rose from 61 to 64 degrees Fahrenheit within the first hour, the second ordered pair would be (2,64) instead of (3,65).

In conclusion, the ordered pairs would be different if the outdoor temperature were recorded every hour for 4 consecutive hours, as it would include additional temperature readings and reflect changes in temperature over shorter intervals of time.

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If you are trying to determine if an input variable may affect your key characteristic (output variable) by examining the

correlation between variables, you should use the tool: D. Scatter plot diagram. therefore, option D.Scatter plot

diagram is correct.

A scatter plot diagram is a graphical representation of the relationship between two variables. It can help you visualize

the correlation between the input and output variables, making it easier to determine if there is a potential cause-and-

effect relationship.

The tool that you should use to examine the correlation between variables is D. Scatter plot diagram.

A scatter plot diagram is a graphical representation that displays the relationship between two variables.

The x-axis represents the input variable, while the y-axis represents the output variable.

By plotting the data points on the scatter plot diagram, you can visually analyze the correlation between the variables.

If there is a strong positive or negative correlation between the variables, it suggests that the input variable may affect

the key characteristic (output variable).

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D. Scatter plot diagram is the tool that should be used to examine the correlation between variables to determine if an input variable may affect your key characteristic (output variable).

The scatter plot diagram is a graphical representation that displays the relationship between two variables, and it is commonly used to identify patterns, trends, and correlations between variables. By examining the scatter plot diagram, you can determine whether there is a positive, negative, or no correlation between the variables, which can help you to identify potential cause-and-effect relationships.
 To determine if an input variable may affect your key characteristic (output variable) by examining the correlation between variables, you should use:

A scatter plot diagram is a graphical tool that helps visualize the relationship between two variables, allowing you to identify any correlation between the input and output variables.

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Bayes' theorem is used to connect the probability of a person's DNA profile appearing in a sample with the possibility of that person being guilty.

Likelihood ratio (LR) is the ratio of the possibility of the evidence given the accused's guilt divided by the probability of the evidence given the accused's innocence. LR is a frequent tool used by experts to estimate the likelihood of a suspect being the source of a DNA sample. The likelihood ratio can be used to assess the probability of a given event. For example, it may be used to determine the likelihood of a crime suspect's DNA profile appearing in a sample.

It is essential to know the likelihood ratio of the first, second, third, fourth, and fifth occurrence of the same diagnosis for the same person to make an accurate assessment of this probability. This may be accomplished by calculating separate likelihood ratios for each occurrence.

In any likelihood ratio calculation, Bayes' theorem is used to link the probability of an individual's DNA profile appearing in a sample with the possibility of that person being guilty. This theorem helps to account for the possibility of coincidental matches.

The value of the likelihood ratio is determined by the strength of the DNA evidence in the case. When there is a higher probability of a match, the ratio will be higher. The value of the LR should be sufficiently large to establish the probability of the evidence given the suspect's guilt or innocence. Typically, an LR of more than 100 is considered a strong match.

The likelihood ratio for the first occurrence is calculated by dividing the likelihood of the evidence given the accused's guilt by the likelihood of the evidence given the accused's innocence. The same calculation is repeated for each additional occurrence. The sum of the likelihood ratios for all occurrences is used to compute the overall likelihood ratio for the case.

To conclude, the separate likelihood ratios for the first, second, third, fourth, and fifth occurrences of the same diagnosis for the same person can be calculated to assess the probability of a given event. Bayes' theorem is used to connect the probability of a person's DNA profile appearing in a sample with the possibility of that person being guilty. An LR of more than 100 is considered a strong match.

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Answer:

3

2,-8

Step-by-step explanation:

this should be the two answers

Answer:

3(n - 5) = 2n - 3

3n - 15 = 2n - 3

n = 12

Step-by-step explanation:

151° Have a great day/night!

Area of a circle = πr^2

Area of a sector with angle x° = (x/360) πr^2

for the larger sector,

x = 255°

r = 13.4 miles

Required area of sector = (255/360) × π × 13.4^2 = 399.57 miles^2

To the nearest tenth, Area = 399.6 miles^2

The normal probability plot suggests the data is approximately normally distributed. The sample standard deviation of given data is 3.13. The 95% confidence interval for the population standard deviation is (1.85, 6.28). The investment manager's desire for a population standard deviation below 6% is validated by the confidence interval.

To construct a normal probability plot, we first need to sort the data in ascending order:

6.6, 6.7, 8.7, 9.6, 10.0, 10.3, 11.3, 12.4, 12.4, 13.8, 14.9, 15.9

Then we can plot the ordered data against the expected values of a normal distribution with the same mean and standard deviation as the sample. The plot shows that the points follow a roughly straight line, which suggests that the data is roughly normally distributed.

To determine the sample standard deviation, we can use the formula:

s = sqrt[(∑(xi - x)²) / (n - 1)]

where xi is the rate of return for each year, x is the sample mean, and n is the sample size.

Sample mean:

x = (13.8 + 15.9 + 10.0 + 12.4 + 11.3 + 6.6 + 9.6 + 12.4 + 10.3 + 8.7 + 14.9 + 6.7) / 12 = 11.433

Sample standard deviation:

s = sqrt[((13.8 - 11.433)² + (15.9 - 11.433)² + ... + (6.7 - 11.433)²) / (12 - 1)]

= 3.059

Therefore, the sample standard deviation is 3.059.

To construct a 95% confidence interval for the population standard deviation of the rate of return, we can use the formula:

CI = [(n - 1) * s² / χ²(α/2, n-1), (n - 1) * s² / χ²(1-α/2, n-1)]

where n is the sample size, s is the sample standard deviation, χ² is the chi-square distribution, and α is the level of significance (1 - confidence level).

For a 95% confidence level and 11 degrees of freedom (n - 1), α = 0.05/2 = 0.025. From the chi-square distribution table with 11 degrees of freedom, we can find the critical values as follows:

χ²(0.025, 11) = 2.201 and χ²(0.975, 11) = 23.337

Plugging in the values, we get:

CI = [(12 - 1) * 3.059² / 23.337, (12 - 1) * 3.059² / 2.201]

= [1.946, 26.557]

Therefore, we can say with 95% confidence that the population standard deviation of the rate of return is between 1.946 and 26.557.

The investment manager wants to have a population standard deviation for the rate of return below 6%. The confidence interval (1.946, 26.557) does not validate this desire, as it includes values above 6%. Therefore, based on the sample data, the investment manager cannot be confident that the population standard deviation is below 6%.

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Step-by-step explanation:

We are given this function:

y=8700* (1.04)^{4}y=8700∗(1.04)

4

8700 is the initial amount.

1.04 shows the change of original amount. This is decimal form of percentage. We need to transform it into regular percentage.

1.04 * 100% = 104%

Now we observe this number. If it is greater than 100% we have growth, if it is lower than 100% it is decay, and if it is equal to 100% than there is no change.

In our case this number is greater than 100% so we have growth. To determine the percentage rate we must substract 100% as it represents the original amount.

104% - 100% = 4%

This would be our solution if we don't have an exponent.

We have exponent so first step is to calculate the number and then we repeat the steps from above.

1.04^{4} = 1,169858561.04

4

=1,16985856

1,16985856 * 100% ≈ 116,99%

116.99% - 100% = 16.99%

So, final solution is growth of 16.99%

We are given this function:

y=8700* (1.04)^{4}y=8700∗(1.04)

4

8700 is the initial amount.

1.04 shows the change of original amount. This is decimal form of percentage. We need to transform it into regular percentage.

1.04 * 100% = 104%

Now we observe this number. If it is greater than 100% we have growth, if it is lower than 100% it is decay, and if it is equal to 100% than there is no change.

In our case this number is greater than 100% so we have growth. To determine the percentage rate we must substract 100% as it represents the original amount.

104% - 100% = 4

This would be our solution if we don't have an exponent.

We have exponent so first step is to calculate the number and then we repeat the steps from above.

1.04^{4} = 1,169858561.04

4

=1,16985856

1,16985856 * 100% ≈ 116,99%

116.99% - 100% = 16.99%

So, final solution is growth of 16.99%

Answer:

Step-by-step explanation:

because ( 90 - 100 ) frequency is greater than all other intervals.

The mode interval for the histogram is (90 - 100).

Option B is the correct answer.

A histogram is a representation of the distribution of data with intervals.

We have,

Mode interval in a histogram is the interval in which the values of the data occur the most.

Now,

From the histogram, we see that,

The interval (90 - 100) has the most date values.

Thus,

The mode interval is (90- 100).

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Answer:

1 : 27

Step-by-step explanation:

Radius of sphere one = r₁ = x units

Radius of sphere 2 = r₂ = 3*x = 3x units

Ratio of area of two sphere's = r₁³ : r₂³

                                                = x³ : (3x)³

                                                \(= \frac{x^{3}}{3^{3}*x^{3}}\\\\= \frac{1}{3^{3}}\\\\= \frac{1}{27}\)

                                                 = 1 : 27

Step-by-step explanation:

To find probability ratio wise

Sports Cars: Total Cars

3 + 3 + 2 = 8 total cars

2 sports cars

Ratio is 2:8

Reduces to 1:4

The standard normal curve can be described as a bell-shaped curve or Gaussian distribution. It is used to model a variety of phenomena in many fields, including physics, finance, and engineering. Its mean is zero, and its standard deviation is one.

The standard normal curve is symmetrical about the mean and is characterized by the empirical rule. The majority of the population is distributed within one, two, and three standard deviations from the mean (68%, 95%, and 99.7%, respectively).

Part a)13th percentile can be calculated using the standard normal distribution tables. From the tables, the value of z when the area under the curve to the left of z is 0.13 is -1.04. Therefore, the 13th percentile is -1.04. 80th percentile can be calculated in the same way as 13th percentile.

The value of z when the area under the curve to the left of z is 0.8 is 0.84. Therefore, the 80th percentile is 0.84.Part b)The values of Q and Q3 cannot be obtained from the standard normal curve since the standard normal curve is not used to study a particular set of data.

It is used to model phenomena with a normal distribution with a mean of zero and a standard deviation of one. Instead, the quartiles can be calculated using the empirical rule in conjunction with the normal distribution tables.

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Answer:

Multiply the top with the other top and the bottom with the other bottom. You could also cross multiple and cancel them out.

Step-by-step explanation:

\(\frac{2}{3}\)×\(\frac{4}{3}\)

Multiply the top: 2x4=8

Multiply the bottom: 3x3=9

=\(\frac{8}{9}\)

Cross multiplication is finding the least common factor or the number itself and simplifying.

\(\frac{3}{2}\)×\(\frac{4}{3}\)

We see that there is a 3 for the top and bottom and so we can cancel them out

This leaves us with:\(\frac{4}{2}\)

By simplifying, we get:

\(\frac{1}{2}\)

Answer:

Step-by-step explanation:

So, adding two rationals is the same as adding two such fractions, which will result in another fraction of this same form since integers are closed under addition and multiplication. Thus, adding two rational numbers produces another rational number.