Help me pls I’ll mark you as brain

Answer:

6 hours is your answer, good luck

Answer:

6 hours

Step-by-step explanation:

Answer:

answer in attachment

Step-by-step explanation:

Answer:

(a) k = 4
(b) y = - 2x + 9

Step-by-step explanation:

x2-x1, y2-y1  
= 3-2, 3-5

= 1,-2
3,3 + 1,-2 = (4,1)

x=4

Answer:

9.5 ft

Step-by-step explanation:

Since it is a rectangle. The lengths are the same and the widths are the same.

12.4 + 12.4 = 24.8

43.8 - 24.8 = 19

19/2 = 9.5

Now,

<2 = <3 [ vertically opposite angle]

Then,

<2 = <8 [corresponding angles]

Again,

<2 + <5 = 180° [straight angle]

◆ True A || B

I hope you understand...

Mark me as brainliest...

Answer:

True

Step-by-step explanation:

∠ 2 and ∠ 5 are same- side exterior angles and are supplementary, sum to 180°

Question:-

\(-n-4<3\)

This is a inequality.We need to solve this inequality.

Solution:-

\(\sf \longmapsto-n-4<3\)

Firstly,Add 4 to two sides :-

\(\sf \longmapsto - n - 4+4<3+4\)

On Simplification:-

As (-) and (+) equals to (-),It would be 4-4.Answer is 0.

\(\sf \longmapsto - n - 0 < 7\)

\(\sf \longmapsto \: - n < 7\)

Then, Divide both sides by -1 :·-

\(\sf \longmapsto \: \dfrac{ - n}{ - 1} < \dfrac{7}{ - 1} \)

On Simplification :-

If the denominator is 1, it means that there is no value of 1 in the fraction.

\(\sf \longmapsto \: \dfrac{ \cancel- n}{ \cancel- 1} < \dfrac{ \cancel7}{ - \cancel1} \)

\(\sf \longmapsto \: n > -7 \)

______________________________________

Henceforth, the value of the inequality is :-

\( \boxed{\tt \: n > - 7}\)

______________________________________

I hope this helps!

Please let me know if you have any questions.

~MisterBrian

Answer:

D

Step-by-step explanation:

The volume for a rectangular prism is given by the formula:

\(V=lwh\)

The length is 2h, the width is 9-h, and the height is h. So:

\(V=2h(h)(9-h)\)

Multiply the first two terms:

\(V=2h^2(9-h)\)

Distribute:

\(V=18h^2-2h^3\)

Our answer is D.

I hope this helps!

1. A

2. D

3. D

4. C

(IF YOU NEED A EXPLANATION, JUST ASK!)

The highest point on a bell-shaped curve represents the peak or maximum value of the distribution. This point is known as the mode of the distribution.

In a bell-shaped curve, also known as a normal distribution or Gaussian distribution, the data is symmetrically distributed around the mean. The curve is characterized by a central peak, and the highest point on this peak corresponds to the mode.

The mode represents the most frequently occurring value or the value that has the highest frequency in the dataset. It is the point of highest density in the distribution.

The bell-shaped curve is often used to model naturally occurring phenomena and is widely applied in statistics and probability theory. The mode provides information about the most common or typical value in the dataset and is useful for understanding the central tendency of the distribution.

While the mean and median also have significance in a normal distribution, the highest point on the bell-shaped curve specifically represents the mode, indicating the value with the highest occurrence in the dataset.

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The magnitude of the car's resultant vector is 21.5km

To find The magnitude of the car's resultant vector

Distance traveled by car in the southeast direction=13km

The direction of the car in the southeast direction=\(45^{0}\)

Distance traveled by car in the north of east direction=16km

The direction of the car in the north of east direction=\(40^{0}\)

To determine the magnitude of the car's resultant vector

Let a =13km

and b=16km

Let a and b be two vectors

The angle between these 2 vectors =\(40^{0}+45^{0}=85^{0}\)

Simply use the expression

That is \(\sqrt{a^{2}+b^{2}+2ab(csosine 85^{0}) }\)

Insert the values in the above equation

\(\sqrt{13^{2}+16^{2}+2(13)(16)(0.087) }\)        (\(Cosine85^{0}\)=0.087)

\(\sqrt{256+169+36.192}\)

\(\sqrt{461.192} =21.47\)  or  21.5

Therefore, the magnitude of the car's resultant vector is 21.5km.

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The regression equation for the monthly sales is given as:

y = 64,100 + 0.394X1 + 9.6X2 - 11,600X3

where:

   y represents the estimated monthly sales in dollars

   X1 represents the regional population in thousands

   X2 represents the per capita income in dollars

   X3 represents the regional unemployment rate as a percentage

To find the estimated monthly sales for a particular region with a population of 796,000, per capita income of $6,940, and an unemployment rate of 6.0%, we need to substitute these values in the regression equation and solve for y.

Substituting X1 = 796, X2 = 6,940, and X3 = 6.0 in the regression equation, we get:

y = 64,100 + 0.394(796) + 9.6(6,940) - 11,600(6.0)

y = 64,100 + 313.184 + 66,384 - 69,600

y = $60,297.184

Therefore, the estimated monthly sales for the particular region is $60,297.184.

The estimated monthly sales for the particular region, given a population of 796,000, a per capita income of $6,940, and an unemployment rate of 6.0%, would amount to approximately $149,190.

To calculate the estimated monthly sales, we substitute the values of the independent variables (population, per capita income, and unemployment rate) into the regression equation. The equation is as follows: y = 64,100 + 0.394X1 + 9.6X2 - 11,600X3.

Plugging in the values, we get:

y = 64,100 + 0.394(796,000) + 9.6(6,940) - 11,600(6.0)

= 64,100 + 313,624 + 66,624 - 69,600

= 374,748 - 69,600

= $305,148.

Therefore, the estimated monthly sales for the particular region would amount to approximately $305,148.

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A sequence is (recursively) defined as a1 = 0, a2 = 1, n>2, \(a_n = a_{n-1} - 3a_{n-2}\). The first seven terms are 0, 1, 1, -2, -5, 1, 16.

A recursive sequence is a sequence in which terms are defined using one or more previous terms which are given.

a1 = 0

a2 = 1

\(a_n = a_{n-1} - 3a_{n-2}\)

a3 = a2 - 3*a1 = 1 - 0 = 1

a4 = a3 - 3*a2 = 1 - 3 = -2

a5 = a4 - 3*a3 = -2 - 3 = -5

a6 = a5 - 3*a4 = -5 + 6 = 1

a7 = a6 - 3*a5 = 1 +15 = 16

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Answer:

3(a +3)

Step-by-step explanation:

(a+3)^2 -a(a+3)

FOIL

a^2 +3a+3a+9 -a(a+3)

Distribute

a^2 +3a +3a +9 -a^2 -3a

Combine like terms

3a +9

FACTOR out a+3

(a+3)( a+3 -a)

(a+3) (3)

3(a+3)

Answer:

3(a+3)

Step-by-step explanation:

Expand the first set of brackets first

(a+3)^2

A^2 + 3a + 3a +9

=A^2 + 6a + 9

Expand the second set of brackets

-a(a+3)

=-a^2 - 3a

Add both sets together

3a + 9

Factorise:

3(a+3)

Answer:

84

Step-by-step explanation:

Considering the definition of an inequality, an inequality that represent the possible values for the number of hotdogs purchased and the number of drinks purchased is 5h + 1.50d≤ 50.

An inequality is the existing inequality between two algebraic expressions, connected through the signs:

An inequality contains one or more unknown values, in addition to certain known data.

In this case, you know that:

Being:

the inequality that expresses the previous relationship is

5h + 1.50d≤ 50

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Carla's behavior of putting in extra practices to become faster can be seen as an example of (Option A.) compensation. This is because she is trying to make up for her perceived lack of speed by working harder to become as fast as her teammates.

Carla's behavior of putting in extra practices to become faster can be seen as an example of compensation. This is because she is trying to make up for her perceived lack of speed by working harder to become as fast as her teammates.

By engaging in extra practices, Carla is attempting to compensate for her lack of speed and improve her performance. This is different from rationalization, which is the act of making excuses for one's behavior, or from regression, which is the act of reverting to a younger age in response to a stressful situation.

Finally, displacement is the act of redirecting one's emotions or anger onto another person or object.

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The statement which is true for Cluster analysis is: The first step in cluster analysis is to select the variables on which clustering is based.

In cluster analysis, the initial step involves selecting the variables that will be used to form clusters. These variables can be numerical or categorical, depending on the type of data being analyzed.

The choice of variables is crucial as it determines the basis for grouping similar data points together into clusters. The selected variables should capture the relevant characteristics or attributes of the data that are important for clustering.

Once the variables are chosen, the clustering algorithm is applied to partition the data into distinct groups or clusters based on the similarity or dissimilarity of the variable values. Various techniques and algorithms, such as K-means clustering or hierarchical clustering, can be employed to perform cluster analysis.

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Answer:

Solution:
4 (x/8-2)
= 4 times 1/16 (16 x x/8 - 2x 16)
= 1/4 (2x-32)
Hence 4, (x/8-2) = 1/4 (2x-32) and it has infinitely many solutions

Step-by-step explanation:

Answer: 1/7

Step-by-step explanation: The points create a posotive line so the answer has to be posotive. You then have to look at the rise over run. (0,1) is 1 unit higher than (-7,0) and the run is the ditance between the 2 x exvalues. 7. Rise/run = 1/7

Answer:

Step-by-step explanation:

let y be the total charges

given that the hour is h

and the cost for raw material is r

therefore

1. The first hour of service call = $60

2. For each additional hour= 25h

 3. 30% over the cost of the materials.= 30/100*r=0.3r

total charges

y=60+25h+0.3r

therefore the expression is

y=60+25h+0.3r

The intersection of the A, B and C sets is { 10}

Answer:

For 7 servings, you need 21 teaspoons of drink mix and 7 cups of water

For 2 servings, you need 6 teaspoons of drink mix and 2 cups of water

Step-by-step explanation:

Since you need 3 teaspoons of drink mix per serving, multiply number of servings by 3 to find teaspoons of drink mix

Since you need 1 cup of water per serving, the number of servings is equal to the number of cups

A second-order accurate, one-sided difference approximation to f'(x) can be derived using the Taylor series expansion with terms up to the second derivative, involving f(x), f(x+h), and f(x+2h).

To derive the second-order accurate, one-sided difference approximation to f'(x), we can start with the Taylor series expansion of f(x+h) and f(x+2h) around x:

f(x+h) = f(x) + hf'(x) + \frac{h^2}{2}f''(x) + O(h^3) -- (1)

f(x+2h) = f(x) + 2hf'(x) + 2h^2f''(x) + O(h^3) -- (2)

Now, we can solve equations (1) and (2) simultaneously to eliminate f(x) and f''(x) terms. Multiplying equation (1) by 2 and subtracting it from equation (2), we get:

f(x+2h) - 2f(x+h) = -hf'(x) + O(h^3)

Rearranging the equation, we obtain:

-2f(x+h) + f(x+2h) = -hf'(x) + O(h^3)

Finally, dividing both sides of the equation by -h, we obtain the desired second-order accurate, one-sided difference approximation for f'(x):

f'(x) = \frac{-2f(x+h) + f(x+2h)}{h} + O(h^2)

This approximation provides an estimate for the derivative of f(x) at point x using the function values at x, x+h, and x+2h, with an error term of O(h^2), indicating second-order accuracy.

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The correlation coefficient between history and math exam scores is of -0.1321, which means that there is a weak negative correlation between history grades and math grades.

Using a calculator, inserting the history and math scores, the coefficient is of -0.1321, which means that there is a weak negative correlation between history grades and math grades.

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Hi :)

15x^12/18x^2

Factor 3 out of 15 and 18

3(5x^12)/3(6x^2)

Divide

5x^10/6

Answer:

\( \frac{15 {x}^{12} }{18 {x}^{2} } \\ \frac{15}{18} \times \frac{ {x}^{12} }{ {x}^{2} } \\ \frac{5}{6} \times {x}^{12- 2} \\ \frac{5}{6} \times {x}^{10} \\ \frac{5 {x}^{10} }{6} \)