The sum of two numbers are 21the second number is six times the first numberwhat are the two numbers

Answer:

1.64

Step-by-step explanation:

The first step to do is to line up the decimal points. We have to add a zero to 0.8 so that the decimal points will align (this does not change the value).

 0.84

+0.80

Then bring down the decimal point into the answer column, and add like normal.

 0.84

+0.80

  1.64

Hope this helps!

Yes, this sample of the homework problems assigned likely to be representative.

A representative sample is a portion of a population that attempts to accurately reflect the characteristics of a larger group. For example, a classroom of 30 students with 15 boys and 15 girls might have a representative sample of 6 students.

3 boys and 3 girls. A sample contains a smaller, more manageable version of a larger cohort, which is useful for statistical analysis when the population size is large.

A representative sample is a technique that can be used to gain insight and observations about a particular population. A representative sample is a small group of subsets that seeks to proportionally reflect a particular trait exemplified in the target population.

A representative sample often gives the best results, but can be the type of sample that is most difficult to obtain.

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Answer:

4th option

Step-by-step explanation:

The factors of a³ + b³ are

a³ + b³ = (a + b)(a² - ab + b² )

Answer:

4th option

Step-by-step explanation:

Answer:

yo that like a whole test lol i dont think people gonna do all that for free

Step-by-step explanation:

7

Step-by-step explanation:

90 degree angle so 90 - 55 = 35

5x= 35

5*7=35

Answer:

B

Step-by-step explanation:

The 2 angles sum to make the right angle , that is

5x + 55 = 90 ( subtract 55 from both sides )

5x = 35 ( divide both sides by 5 )

x = 7 → B

Answer:

10

Step-by-step explanation:

If Sabrina is 5 & Michael is 7. (5×7=35)

Michael is 7, & he is 3 yrs younger than Meghan, who is 10. And Meghan is twice as old as Sabrina, when Sabrina is 5 (5×2=10).

Answer:

Meghan is 10 years old

Step-by-step explanation:

We can write out the information with equations and then combine the information. Then, we can solve for x and hence solve for Meghan's age.

We write our first variable, x. Meghan (m) is twice as old as Sabrina (x). So we write:

m = 2x

Michael (M) is 3 years younger than Meghan. So we write:

M = m - 3

The product (multiplication) of Sabrina's and Michael's age is 35. So we write:

Mx = 35

To solve for x, we can substitute Meghan's age (2x) into the equation for Michael.

M = 2x - 3

Then, we can substitute this for M in the final equation to solve for x. This will be a quadratic so we factorise to solve it:

x(2x - 3) = 35

2x² - 3x = 35

2x² - 3x -35 = 0

(2x - 7)(x - 5) = 0

x = ⁷⁄₂ or 5

we know it is 5 since ⁷⁄₂ does not work and it is not a whole number. Hence:

m = 2(5)

m = 10

Answer:

81.64

Step-by-step explanation:

im using 3.14 not all of pi is that ok

Answer:

81.64

Step-by-step explanation:

Write the equation 13r * 3.14

First do 13(2) to get 26

Secondly do 26 times 3.14

this will give you 81.64

Answer:5.6089*10^4

Step-by-step explanation:

Answer:

Central angle intercepted by arc is 0.7 radian

Step-by-step explanation:

Answer:

a. 18

b.144

c.108

Step-by-step explanation:

Using the given, Angle R equal 5x-54 and Angle T is 8u.

Also RS is congruent to ST. Since SR is congruent to ST, their opposite angles are also congruent using base angle theorem. So angle R is equal to Angle T. However, STU is a exterior angle so STU isn't congruent to SRT.

However, we can add , interior angle T, and STU to 180 to find x.

Interior angle T=SRT so interior angle t=5x-54.

Set up equation

\(5x - 54 + 8x = 180\)

\(13x - 54 = 180\)

\(13x = 234\)

\(x = 18\)

b.Plug 18 into 8x

\(8(18) = 144\)

STU=144

c. Using the triangle exterior angle theorem, the exterior angle is equal to the measure of the sum of two non adjacent angles.

Angle S and Angle R are the non adjacent angle to STU.

So we cast up this equation.

\(5x - 54 + s = 180\)

plug 18 in for x

\(5(18) - 54 + s = 144\)

\(90 - 54 + s = 144\)

\(36 + s = 144\)

s=108

Answer:

6 inches

Step-by-step explanation:

If the perimeter of the whole pentagonal sign is 30 inches, each side must be 6 inches. Why? A pentagon has 5 sides, and each side is equivalent. 30/5=6.

Would appreciate if you marked my answer as brainliest, have a good day :)

1. This task would likely be framed as a supervised learning problem

2. This task would also be framed as a supervised learning problem.

3. This task would typically be framed as an unsupervised learning problem.

4. This task would likely be framed as a regression problem since the goal is to estimate the repair time,

5. This task can be considered as an unsupervised learning problem.

Deciding whether to issue a loan to an applicant based on demographic and financial data (with reference to a database of similar data on prior customers):

This task would likely be framed as a supervised learning problem. The goal is to predict whether to approve or reject a loan application based on the given data. Hence, it can be considered a classification problem.

In an online bookstore, making recommendations to customers concerning additional items to buy based on the buying patterns in prior transactions:

This task would also be framed as a supervised learning problem. The goal is to recommend additional items to customers based on their buying patterns. It can be approached as a recommendation system using collaborative filtering techniques, which involve predicting customer preferences. This can be considered a classification problem.

Identifying segments of similar customers:

This task would typically be framed as an unsupervised learning problem. The objective is to identify groups or clusters of similar customers based on their attributes or behaviors. Unsupervised learning algorithms such as clustering can be used to accomplish this task.

Estimating the repair time required for an aircraft based on a trouble ticket:

This task would likely be framed as a regression problem since the goal is to estimate the repair time, which is a continuous variable. Supervised learning techniques such as regression algorithms can be employed to predict the repair time based on the provided input features.

Automated sorting of mail by zip code scanning:

This task can be considered as an unsupervised learning problem. The aim is to sort mail based on zip codes, which involves grouping similar items together. Unsupervised learning algorithms like clustering can be utilized to identify patterns and group the mail accordingly.

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Differential equations and boundary value problems are mathematical equations that contain derivatives of unknown functions and their variables.

These equations are used to model a wide range of physical, biological, and chemical processes. The seventh edition of Fundamentals of Differential Equations and Boundary Value Problems by R. Kent Nagle, Edward B. Saff, and Arthur David Snider is a comprehensive textbook that covers the fundamentals of these equations.Differential equations and boundary value problems are mathematical equations that contain derivatives of unknown functions and their variables.  It includes topics such as first order equations, higher order linear equations, systems of equations, Laplace transforms, Fourier series, and numerical methods. It also contains a variety of worked examples, exercises, and applications to help students understand the material. Examples include solving initial value problems, boundary value problems, and inverse problems. The book also provides a step-by-step approach to solving problems, including the use of formulas such as the Euler-Cauchy formula, the Picard-Lindelof formula, the Runge-Kutta formula, the Laplace transform, and the Fourier series.

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Complete question:

Find the solution to the differential equation dy/dx + 4y = 0, given the boundary values y(0) = 2 and y(2) = 0.

If the mean monthly electric bill for 71 residents of the local apartment is $62 , then the best point estimate is $62 .

In the question ,

it is given that ,

the number of residents in the local apartment complex is = 71

the mean electric bill for the 71 residents = $62 ;

we know that the sample mean is itself called as the best point estimate ;

So , best point estimate for mean monthly electric bill for all residents of local apartment complex will be = mean monthly bill for 71 residents of  local apartment complex which is given as $62 .

Therefore , the best point estimate is $62 .

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Answer:

Step-by-step explanation:

4x - 8 - 27 + 6x - 2x + 10 - 12x =

4x + 6x - 2x - 12x - 8 - 27 + 10 =

-4x -25

Answer D

Step-by-step explanation:

Answer:

Step-by-step explanation: The speed of reaction to differences between forecasts and actual results. is the answer i think

Answer:

------------------------

We have a repeating decimal 4.6(1).

Let's express it as a GP:

Fund the sum of infinite GP, with the first term of a = 0.01 and common ratio of r = 0.1:

Add 4.6 to the sum:

Hence the fraction is 4 11/18.

Using Euler integration, the next values of x and y can be determined as follows:

x_next = x_current + delta_X

y_next = y_current + delta_X * y'

Euler integration is a numerical method used to approximate solutions to differential equations. It is based on the concept of dividing the interval into small steps and using the derivative at each step to calculate the next value. In this case, we are given the current values of x=2, y=8, and y'=9, with a step size of delta_X=5.

To determine the next values of x and y, we use the following formulas:

x_next = x_current + delta_X

y_next = y_current + delta_X * y'

Substituting the given values into the formulas, we have:

x_next = 2 + 5 = 7

y_next = 8 + 5 * 9 = 53

Therefore, the updated values of x and y using Euler integration are x=7 and y=53.

It's important to note that Euler integration provides an approximate solution and the accuracy depends on the chosen step size. Smaller step sizes generally lead to more accurate results. Other numerical methods, such as Runge-Kutta methods, may provide more accurate approximations.

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Answer: I have no Answer.

Explanation: There is no question to answer but ill take the 5 points.

It would take approximately 6 minutes to travel through the thickest oceanic crust at a speed of 100 km/hr.

To determine the time it would take to travel through the thickest oceanic crust at a speed of 100 km/hr, we need to know the thickness of the oceanic crust.

The oceanic crust is the outermost layer of the ocean floor and is generally thinner than the continental crust. On average, the thickness of the oceanic crust ranges from 5 to 10 kilometers (km). However, the thickness can vary depending on the specific location and geological factors.

Assuming we consider the thickest part of the oceanic crust, which could be up to 10 km thick, we can calculate the time it would take to travel through it at a speed of 100 km/hr.

Using the formula Time = Distance / Speed, we can determine the time as follows:

Time = (Thickness of Oceanic Crust) / (Speed)

Time = 10 km / 100 km/hr = 0.1 hr

Converting 0.1 hour to minutes, we have:

Time = 0.1 hr * 60 min/hr = 6 minutes

The correct answer is D. 6 minutes. This calculation is based on the assumption that we are considering the thickest part of the oceanic crust, which is approximately 10 km thick. It's important to note that the actual thickness of the oceanic crust can vary, and the time required would depend on the specific thickness encountered during the journey.

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Answer:

7

Step-by-step explanation:

66+(4x-4)=90

66+4x-4=90

62+4x. =90

4x. =28

x. =7

we cannot determine whether `f(x)` has a local maximum at `x = 6/a`.Thus, the correct option is C: `f(x)` has a local minimum at `x = -5`.

We know that the derivative of a function provides information about the slope of the graph of that function. Hence, we can use the information provided by the derivative of a function to make certain conclusions about the shape and behavior of the graph of that function.Now, given the derivative of the function f(x) is `f′(x) = 2x² − 2x − 60`. Let us find the second derivative of this function as follows:

`f′(x) = 2x² − 2x − 60`

Differentiating `f′(x)`, we get: `f′′(x) = 4x − 2`Now, let's discuss each option one by one:Option A: `f(x)` has an inflection point at `x`.We can conclude this by finding the point where the concavity of the function changes, i.e., the point where `f′′(x)` changes sign. For this function, `f′′(x) = 4x − 2`.We have to solve the inequality `f′′(x) < 0` for `x`. `4x − 2 < 0 ⇒ x < 1/2`Therefore, the function `f(x)` is concave down for `x < 1/2` and concave up for `x > 1/2`.Thus, the function has an inflection point at `x = 1/2`.So, this option is incorrect.Option B: `f(x)` has an inflection point at `x = 2`.We have already seen that the function has an inflection point at `x = 1/2`. So, this option is incorrect.Option C: `f(x)` has a local minimum at `x = -5`.To find the local minimum of the function, we have to find the critical points of the function. These are the points where `f′(x) = 0` or `f′(x)` is undefined. Here, `f′(x) = 2x² − 2x − 60`.We have to solve the equation `f′(x) = 0` for `x`. `2x² − 2x − 60 = 0 ⇒ x² − x − 30 = 0 ⇒ (x − 6)(x + 5) = 0`So, the critical points are `x = 6` and `x = -5`.We can find the nature of these critical points by analyzing the sign of `f′(x)` on either side of the critical points:  On the interval `(-∞,-5)`, `f′(x) < 0`. On the interval `(-5,6)`, `f′(x) > 0`.On the interval `(6,∞)`, `f′(x) > 0`.So, `x = -5` is a local maximum and `x = 6` is a local minimum.Therefore, the option C is correct.Option D: `f(x)` has a local minimum at `x = -6`.This option is incorrect as the function has a local minimum at `x = 6`, not `x = -6`.Option E: `f(x)` has a local maximum at `x = 6/a`.As the value of `a` is not known, we cannot determine the value of `6/a`.

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Answer:

1

Step-by-step explanation:

For this problem, the negative sign on the 38 stays.  You can remove the parentheses and addition sign and subtract 38 from 12.

12 + (-38) + 27

12 - 38 + 27

-26 + 27

1

If the problem was (12 - (-38), than the negatives would cancel out and form (12 + 38).

Using BODAMAS rule, the equation 12 + -(38) - 27 the simplified answer is 1.

The full form of BODAMAS is" bracket, orders, divisions, multiplication, addition, subtraction. Any calculation follows the order of BODAMAS rule".

According to the question,

12 + (-38) + 27

= 12 - 38 + 27           [Removing the Parentheses]

= 26.

Hence, Using BODAMAS rule, the equation 12 + -(38) - 27 the simplified answer is 1.

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Raven bought 1/3 kg of turkey ham, and Chisa bought 2/9 kg less. The total amount of turkey ham they bought together is 1/3 + 1/9 = 3/9 + 1/9 = 4/9 kg. Together, they bought a total of 4/9 kg of turkey ham.

A fraction is a mathematical symbol that represents a portion of a whole or a component of a number. It is made up of two numbers divided by a horizontal line, with the number above the line (numerator) indicating the portion under consideration and the number below the line (denominator) indicating the entire or the total number of equal parts in the whole.

From the given information, we know that Raven bought 1/3 kg of turkey ham, and Chisa bought 2/9 kg less than Raven. This means that Chisa bought:

1/3 kg - 2/9 kg = 3/9 kg - 2/9 kg = 1/9 kg

Now we can find the total amount of turkey ham they bought together by adding Raven's purchase and Chisa's purchase:

1/3 kg + 1/9 kg = 3/9 kg + 1/9 kg = 4/9 kg

Therefore, Raven and Chisa bought a total of 4/9 kg of turkey ham together.

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Answer:

For $10.50, you can buy 1 pound of shrimp

Step-by-step explanation:

We know that "c" is the total cost and "p" is the number of pounds of shrimp. The number 10.50 is considered to rate for every pound of shrimp because, if we replace "p" with 1 pound, we will get the answer of $10.50. Thus, it costs $10.50 for every pound of shrimp.