A photocopying machine can produce 420 copies in 35 minutes. Find its rate of production of copies per hour.

Learning math can be a challenging task, but with persistence, hard work, and effective study strategies, it is definitely possible to improve your math skills.

Start with the basics: Make sure you have a good foundation in basic math concepts before moving on to more advanced topics. Practice basic arithmetic, fractions, decimals, and percentages until you feel comfortable with them.

Focus on understanding, not just memorizing: Math is not just about memorizing formulas and equations; it's about understanding how and why they work. Focus on understanding the underlying concepts and principles.

Practice regularly: The more you practice, the better you will get. Try to set aside some time each day to practice math problems. This will help you build your skills and improve your understanding.

Use multiple resources: Don't just rely on one textbook or resource. Use multiple resources such as online tutorials, videos, practice problems, and textbooks to get a well-rounded understanding of the topic.

Seek help when needed: Don't hesitate to ask for help if you are struggling with a particular topic. You can reach out to a teacher, tutor, or online community for help.

Stay motivated: Math can be challenging, but it's important to stay motivated and not give up. Keep a positive attitude, celebrate your successes, and remember that every mistake is an opportunity to learn and grow.

Remember that learning math takes time and effort, so don't get discouraged if you don't see immediate results. With persistence and hard work, you can become proficient in math.

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Answer:

hello I don't understand forgiveness helped me in my task

Step-by-step explanation:

Answer:

It would be the graph that has point (0,12) and is decreasing to the right.

Answer:

135

Step-by-step explanation:

The area is given by

A = bh  where b is the base and h is the height

A = 9* 15

A =135

Answer:

\(135 \: {units}^{2} \)

Step-by-step explanation:

\(area = b \times h \\ = 9 \times 15 \\ = 135 \: {units}^{2} \)

A picnic is a fun way to get outside, spend time with family and friends, and enjoy a meal in the great outdoors. Picnics can be as simple or elaborate as you want them to be, and they can take place in a variety of locations, from your backyard to a local park or beach.

A school is organizing a picnic for all of its students, and there are a total of N students labeled from 1 to N in the school. Each student i has a compatibility factor of Xi. It is time for the picnic, and the school needs to decide how to group the students so that they can all have a good time together.

One way to approach this problem is to use a clustering algorithm to group the students based on their compatibility factors. There are many different clustering algorithms available, but one popular approach is k-means clustering.

K-means clustering works by dividing the data into k clusters, where k is a user-specified parameter. The algorithm iteratively updates the centroids of each cluster until the clusters converge.In the case of the picnic, we could use k-means clustering to group the students into k clusters based on their compatibility factors.

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The LS estimator of βˆ0 in a simple linear regression model is equal to the sample mean of the dependent variable, while the LS estimator of βˆ1 is equal to the sample covariance between x and y divided by the sample variance of x.

1. LS estimator of βˆ0:

In a simple linear regression model, the equation is y = β0 + ε, where y represents the dependent variable, β0 is the intercept, and ε is the error term. The LS estimator of βˆ0 is obtained by minimizing the sum of squared residuals (SSR). The SSR is defined as the sum of the squared differences between the observed values of y and the predicted values of y based on the model.

When we minimize the SSR, we differentiate it with respect to β0 and set the derivative equal to zero. This leads to the condition that the LS estimator of βˆ0 is equal to the value of β0 that minimizes the SSR. The value of β0 that minimizes the SSR is the one that makes the sum of the residuals equal to zero.

Since the residuals represent the differences between the observed values of y and the predicted values of y, the sum of the residuals can be interpreted as the sum of the deviations of the observed values from the predicted values. When the sum of the residuals is zero, it implies that the sum of the deviations is also zero.

Therefore, the LS estimator of βˆ0 is equal to the sample mean of the dependent variable, as the sample mean represents the average value of the dependent variable and minimizes the deviations from the predicted values.

2. LS estimator of βˆ1:

In a simple linear regression model, the equation is y = β0 + β1x + ε, where y represents the dependent variable, x represents the independent variable, β0 is the intercept, β1 is the slope, and ε is the error term. The LS estimator of βˆ1 is obtained by minimizing the SSR, similar to the LS estimator of βˆ0.

To derive the LS estimator of βˆ1, we differentiate the SSR with respect to β1 and set the derivative equal to zero. This leads to the condition that the LS estimator of βˆ1 is equal to the value of β1 that minimizes the SSR. The value of β1 that minimizes the SSR is the one that makes the sum of the products of the residuals and the corresponding values of x equal to zero.

The product of the residuals and the values of x represents the covariance between x and y, as it measures the joint variability between the two variables. The sum of these products being zero implies that the covariance between x and y is zero.

The sample covariance between x and y divided by the sample variance of x is an unbiased estimator of the population slope β1. Hence, the LS estimator of βˆ1 is given by the sample covariance between x and y divided by the sample variance of x.

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Answer:

20 is the mean length of rainbows

Answer:

The triangles are similar.

Step-by-step explanation:

Angle KLO measures 43°, so angles KLO and KNM are congruent.

Angle KMN measures 47°, so angles KMN and KOL are congruent.

So triangles KLO and KNM are similar.

Answer:

-18/7

Step-by-step explanation:

When subtracting a negative, the sign becomes positive, so now the equation would be -3 2/7 + 5/7.

By turning -3 2/7 into an improper fraction, you would get -23/7 + 5/7.

-23 +5 = -18 so -18 would be the numerator over the denominator (7) equals -18/7

The mean of the following data 0,5,30,25,16,18,19,26,0,20,28 is 17.

Hence option D is the correct option.

Mean is the average value of a given set of data. It is calculated by the formula,

Mean =  {Summation of all the values in the data set} / {Number of observations is the data set}

That is, Mean = {Σ all values in the data set} / {number of observations}

The given data set is as follows,

0,5,30,25,16,18,19,26,0,20,28

The number of observations in the data set is 11.

The summation of all the values in the data set is = {0 + 5 + 30 + 25 +
16 + 18 + 19 +26 + 0 + 20 + 28} = 187

Therefore, by applying  the formula of Mean we get

Mean = 187/ 11 = 17

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Answer:

1<x<4

Step-by-step explanation:

9<2x+7<15

9+−7<2x+7+−7<15+−7(Add -7 to all parts)

2<2x<8

2 /2 < 2x /2 /< 8 /2  (Divide all parts by 2)

1<x<4

As per arithmetic progression the value of 15th term is 0.

An arithmetic progression, or A.P., is a sequence of numbers in which the difference between consecutive terms is constant.

To start, let's call the common difference "d" and the first term "a". We can use the formula for the nth term of an A.P., which is Tn = a + (n-1)d, where Tn is the nth term and n is the position of the term in the A.P.

Using this formula, we can find the 6th term and 9th term. For the 6th term, T6 = a + (6-1)d = a + 5d. For the 9th term, T9 = a + (9-1)d = a + 8d.

Now, using the information given, we can create an equation: 6(a + 5d) = 9(a + 8d). Expanding both sides and simplifying, we get:

6a + 30d = 9a + 72d

Subtracting 9a from both sides, we get:

-3a + 30d = 72d

Subtracting 30d from both sides, we get:

-3a = 42d

Dividing both sides by -3, we get:

a = -14d

Now that we have found the value of "a", we can use the formula for the nth term again to find the 15th term. T15 = a + (15-1)d = -14d + 14d = 0.

So, the 15th term of the A.P. is 0.

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Answer:

69

Step-by-step explanation:

3.3x21=69.3

Answer: 810

Step-by-step explanation:

Answer:

well i think its over 103.10 because 11 months divide 2 fraction then take 1 carry or instead use calculator and type 0077239812 this binary!! and divide by 23 and thats the answer its only like decimals from the point!!

Step-by-step explanation:

Does this help?

Answer:

Step-by-step explanation:

Lets work out the equation for the given relationship.

This is a linear relationship.

Find the slope first:

Use one pair of points to get the equation:

We see the yearly fee is $15 and monthly rate is $2.25.

If we apply the changes to rates the equation becomes:

Find the cost of 11 months of membership:

4100 Is the answer I just did it

The length and the width of the rectangular barn wall is found to be 8 and 7 feet respectively.

The area of the barn wall in rectangular shape is 182 square feet and it is also given that the length if the barn us 12 more than twice the width of the barn.

Now, if the length is L and width is W,

So, the algebraic relation is,

2W + 12 = L

The area is,

L x W = 182

W = 182/L

Putting the values of L,

2(182/L) + 12 = L

L²+12L-364=0

Now, solving the above quadratic equation, we get the value of L to be,

26 and -14.

We neglect the negative value, so the length is 24 feet.

26 x W = 182

W = 182/26

W = 7 feet.

So, the length and width of the barn are 8 and 7 feet respectively.

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Answer:see the photo I send to you

Step-by-step explanation:

Ok

a. Null hypothesis: Proportion of patients cured by the drug is less than or equal to 50%

Alternative hypothesis: Proportion of patients cured by the drug is greater than 50%

b. Test statistic = 1.4

c. At the 5% significance level, we fail to reject the null hypothesis. We cannot conclude that the proportion of patients cured by the drug is greater than 50%.

a. The null hypothesis would be that the proportion of patients cured by the drug is equal to or less than 50%, while the alternative hypothesis would be that the proportion of patients cured by the drug is greater than 50%.

b. To calculate the test statistic, we can use the formula:

z = (P - p) / sqrt(p × (1 - p) / n)

Where P is the sample proportion of patients cured, p is the hypothesized proportion of patients cured (in this case, 0.5), n is the sample size, and sqrt refers to the square root function.

Plugging in the values, we get

z = (0.52 - 0.5) / sqrt(0.5 × 0.5 / 400) = 1.4

c. To determine if we can reject the null hypothesis at the 5% significance level, we need to compare the test statistic (1.4) to the critical value of the standard normal distribution at a 5% level of significance, which is 1.645.

Since the test statistic (1.4) is less than the critical value (1.645), we fail to reject the null hypothesis. Therefore, we cannot conclude that the proportion of patients cured by the drug is greater than 50% at the 5% significance level.

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We can see here that the equation that represents the situation is:

d. 4 ÷ 1 = 4 (The customer bought 4 kg of tangerines, which is equivalent to 4 bags, each weighing 1 kg).

An equation is a mathematical statement that asserts the equality of two expressions. It is a statement that asserts that two expressions are equal, usually represented by a "=" sign. Equations can take many forms and can involve numbers, variables, and mathematical operations such as addition, subtraction, multiplication, and division.

In order to draw the diagram, you need to get the equations correct.

The others equations a, b, c and e doesn't represent the situation, they are not mathematical equations and they are not related to the problem.

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Answer:

(a)$17,575.

(b)$11,274,000

Explanation:

Length of the tube well =800 meters

Cost of the 1st meter = $110

The cost per meter increases by $35 for every subsequent meter.

We can model this problem as an arithmetic progression where:

• First term, a = $110

• The common difference, d =$35

(a)The cost of digging the 500th meter

The nth term of an arithmetic progression is derived using the formula:

Therefore, the 500th term will be:

The cost of digging the 500th meter is $17,575.

(b)The total cost incurred will be the cost of digging 800 meters of the tube well.

We obtain this by finding the sum of the cost for each meter.

The sum of an A.P. can be obtained using the formula below:

Substitution of the given values, we have:

The total cost incurred for the entire job is $11,274,000.

Answer:

1.6056648e+12

Step-by-step explanation:

Answer:

21071715921

Step-by-step explanation:

This is what I got when i entered it into a calculator. Hopefully i'm correct and this helps :) Have a good day/night

(L2) An inscribed circle is one that encompasses a polygon so that it passes by each of the polygon's vertices.

A circumcircle, not an inscribed circle, is a circle that encircles a polygon at each vertex. A circle that is enclosed within a polygon and intersects each side of the polygon exactly once is said to be inscribed. A circumcircle, on the other hand, is a circle that goes through every vertex of the polygon, with its center located at the point where the perpendicular bisectors of the polygon's sides converge. The greatest circle that can be drawn within a polygon is the circumcircle, while the largest circle that can be drawn inside a triangle is the inscribed circle.

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Step-by-step explanation:

Easy steps!

Answer:

The answer is 324

Step-by-step explanation:

I don't know if it's the correct answer but I hope it helps

pls mark me as brainliest

Answer:

linear equations

Step-by-step explanation:

linear inequalities

Answer:

natural numbers.ok

hope this helps you ☺️☺️

Answer:

When rounding to 1 significant figure, we keep the first non-zero digit and drop all the remaining digits. In this case, the first non-zero digit is 2, so we keep that and drop all the remaining digits:

a) 276040 rounds to 3 x 10^5 (or 300000 in standard form).

So the rounded number to 1 significant figure is 3 x 10^5.

Answer:

-3a² - ab - 7ac - 2b² + 6bc + 4c²

Step-by-step explanation:

Step 1: Distribute

3a² + 3ab + 3ac - 2ab + 2b² -2bc

Step 2: Combine like terms

3a² + ab + 3ac + 2b² - 2bc

Step 3: Distribute again

-4ac + 4bc + 4c² - (3a² +ab + 3ac + 2b² -2bc)

Step 4: Combine like terms again

-3a² - ab - 7ac - 2b² + 6bc + 4c²

And you have your final answer.