5/12 of the pupils in a school are left-handed and the rest are right-handed. There are 276 more pupils who are right-handed than left-handed. What is the total number of pupils in the school?

Answers

Answer 1

Answer:

There are a total number of 1656 students in the school.

Step-by-step explanation:

Let's set up this word problem in mathematical terms.

We can call the number of Left Handed Students as X,

and we can call the number of Right Handed Students as Y.

Since there are 276 more right handed pupils than left handed, we have the following equation:

X + 276 = Y   -Equation 1

Also, since there are 5/12 ratio of left handed students and 7/12 right handed students, we get:

Total Students = T

(5/12) T = X                  -Equation 2

(7/12) T = Y                  -Equation 3

Substituting equations 2 and 3 into equation 1 we get:

[tex]\frac{5}{12} T+276=\frac{7}{12} T[/tex]

Solving for Total number of students (T) we get:

T = 1656


Related Questions

Use a double integral to find the volume of the solid in the first octant which is enclosed by the surface 3x + 6y + 2z = 12 and the coordinate planes.

Answers

Answer:

8 unit^3

Step-by-step explanation:

Given:

- The equation of the plane is:

                                     3x + 6y + 2z = 12

Find:

Use a double integral to find the volume of the solid in the first octant which is enclosed by the plane and the coordinate planes

Solution:

- Express the equation of surface ( plane ) as a subject of any coordinate axis we will use z:

                                     2z = 12 - 3x - 6y

                                     z = 6 - 1.5x - 3y

- The double integral would be set- up as:

                                    [tex]\int\limits^d_c \int\limits^a_b ({6 - 1.5x - 3y}) \, dy.dx[/tex]

- Where, a , b ,c and d are limits of integration.

- To determine the limits we will project the surface to x-y plane or z = 0 plane, the equation we have is:

                                     0 = 6 - 1.5x - 3y

                                     y = 2 - 0.5x

- For limits a and b the integration is with respect to y, so we express the limits of y in terms of x. Where lower limit b = 0, and upper limit a = 2 - 0.5x

- Similarly, the limits c and d is with respect to x are constants we have:

                                       c = 0

                                       0 = 2 - 0.5*d

                                       d = 4

- Then solve the double integral:

                     [tex]\int\limits^4_0 ({6y - 1.5xy - 1.5y^2}) \,_0 ^2^-^0^.^5^x dx \\\\\int\limits^4_0 ({6(2-0.5x) - 3x + 0.75x^2 - 1.5(2-0.5x)^2}) dx \\\\({-6(2-0.5x)^2 - 1.5x^2 +0.25x^3 + (2-0.5x)^3}) | ^4_0\\\\= ( -6(0) - 1.5(16) + 0.25*(64) + (0) + 6(4) + 0 + 0 - (8) ) \\\\= 8 unit^3[/tex]            

                                     

Final answer:

To find the volume of the solid in the first octant enclosed by the given surface and the coordinate planes, a double integral is used where z is expressed in terms of x and y, and appropriate limits for x and y are determined.

Explanation:

The volume of the solid in the first octant enclosed by the surface 3x + 6y + 2z = 12 and the coordinate planes can be found using a double integral. First, we need to express z in terms of x and y: z = 6 - (3/2)x - 3y.

The limits for x and y are determined by setting z = 0; thus, x ranges from 0 to 4, and y ranges from 0 to (6-(3/2)x)/3. Hence, the double integral equation is set up as follows:

[tex]\(\int_{0}^{4}\int_{0}^{2-(3/2)x} (6 - \frac{3}{2}x - 3y) dy dx\)[/tex]

Evaluating this double integral will give the volume of the solid.

What are the values of i and j after the following code snippet is run? int i = 10; int j = 20; int count = 0; while (count < 5) { i = i + i; i = i + 1; j = j - 1; j = j - j; count++; } System.out.println("i = " + i + ", j = " + j);

Answers

Answer:

i = 351, j = 0

Step-by-step explanation:

The while loop runs 5 times as indicated by the variable, count.

The variable, i, has an initial value of 10. The first line of the loop code doubles the value of i while the second increments it by 1. This is done 5 times. We have

Iteration 1: i = 10 + 10 + 1 = 21

Iteration 1: i = 21 + 21 + 1 = 43

Iteration 1: i = 43 + 43 + 1 = 87

Iteration 1: i = 87 + 87 + 1 = 175

Iteration 1: i = 175 + 175 + 1 = 351

The third line of the loop code decrements j by 1. However, the fourth line sets j = 0 by subtracting it from itself. Hence, j is always 0 at the end of the loop, no matter its initial value or the number of iterations.

Thus, at the end of the code snippet, i = 351 and j = 0.

Evaluate:
(-3g^2)^0

Where g=0

Answers

Answer:

undefined or 1

Step-by-step explanation:

(-3g^2)^0

Where g=0. (given)

now,

[tex](-3g^2)^0 \\ ( - 3(0) {}^{2} ) {}^{0} \\

[/tex]

undefined or 1

[tex]\text{Solve by plugging in 0 to g}\\\\(-3\left(0\right)^2)^0\\\\\text{Solve:0}\\\\(-3\left(0\right)^2)^0\\\\(-3(0))^0\\\\(0)^0=1\\[/tex]

what is the value of x.
A. 17
B. 16
C. 16.5
D. 15

Answers

Answer:

Step-by-step explanation:

Because angle FGH and angle HGE are congruent, that angle bisector, namely GH, separates this largr triangle into one that shares sides in proportion to each other.  

That means that [tex]\frac{x}{13.5} =\frac{68}{54}[/tex]

Cross multiply to get

54x = 918 and

x = 17

Choice A.

Which of the following is true of qualitative research methods? Question 5 options: Qualitative researchers must be able to translate numerical data into meaningful narrative information. Qualitative researchers seek to fit their answers into predetermined categories rather than to understand research participants. Qualitative research is less superior for studying topics that involve complex psychological motivations. Qualitative researchers emphasize their samples are made up of representative rather than relevant consumers.

Answers

Complete Question:

Which of the following is true of qualitative research methods?

A. Qualitative data may be analyzed qualitatively or quantitatively.

B. Qualitative researchers must be able to translate numerical data into meaningful narrative information.

C. Qualitative researchers seek to fit their answers into predetermined categories rather than to understand research participants.

D. Qualitative research is less superior for studying topics that involve complex psychological motivations.

E. Qualitative researchers emphasize their samples are made up of representative rather than relevant consumers.

Answer:

A. Qualitative data may be analyzed qualitatively or quantitatively.

Step-by-step explanation:

Qualitative data research is a way or method to gather or collect non-numerical information either by observation or by asking crucial questions. It is a scientific method.

Qualitative data research involves the gathering accurate data and one of the way to do this is by carrying out surveys.

Qualitative data research determines WHY a particular action is carried out.

There are various methods of Qualitative data research. They are:

a. Direct Observation

b. In-depth interviews

c. Focus groups

d. Open end surveys

e. Oral History

f. Ethnographic observation

Qualitative data may be analysed qualitatively or quantitatively.

Final answer:

Qualitative research methods involve the collection and analysis of non-numerical data to understand subjective experiences and behaviors.

Explanation:

Qualitative research methods involve the collection and analysis of non-numerical data to understand subjective experiences and behaviors. It emphasizes open-ended questions, in-depth interviews, and observations to gain insights into complex psychological motivations. Qualitative researchers do not seek to fit their answers into predetermined categories but rather aim to understand research participants and their experiences.

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Which statement is true about the box plots? Both the ranges and the interquartile ranges for the data sets are the same. Neither the ranges nor the interquartile ranges for the data sets are the same. The interquartile ranges for the box plots are the same

Answers

Answer:

Neither the ranges nor the interquartile ranges for the data sets are the same.

Step-by-step explanation:

In a visual display, the boxplot presents five sample statistics: the minimum, the lower quartile, the median, the upper quartile and the maximum, and the box length gives an indication of the sample variability and the line across the box shows where the sample is centred, with an end at each quartile. The length of the box is thus the interquartile range of the sample and, whether the sample is symmetric or skewed, either to the right or left, the "shape" of the sample, and by implication, the shape of the population from which it was drawn, considering appropriate analyses of the data.

The question is incomplete! The complete question along with answer and explanation is provided below.  

Question:  

Which statement is true about the box plots? (attached in the image)

A Both the ranges and the interquartile ranges for the data sets are the same.

B. Neither the ranges nor the interquartile ranges for the data sets are the same.

C. The interquartile ranges for the box plots are the same, but their ranges are different.

D. The ranges for the box plots are the same, but their interquartile ranges are different.

Answer:

D. The range of both box-pots is same (9) but the interquartile range of box-plots is different (6 and 5)

Step-by-step explanation:

To answer this question, first we have to understand what a box plot is!

A box plot is a type of graph which shows 5 statistical characteristics of a data set.

1. Maximum and 2. Minimum values of data

3. Upper Interquartile and 4. Lower interquartile of data

5. Median of the data

Now lets analyze the attached box-plot so that we can conclude what is true about them and what is not!

We have two box-plots for two teacher's classes Marc and Sue and they show the number of incorrect questions in exam.

For Sue's class: (on the bottom)

As you can see the maximum and minimum values are

Maximum = 12 and Minimum = 3

So the Range becomes = 12 - 3 = 9

The upper quartile Q3 is 10 and lower quartile Q1 is 5

So the Interquartile Range becomes = 10 - 5 = 5

This Interquartile Range represents the 25 to 75 percentile of the data

There is little vertical line skewed to the right represents the Median = 9

So to summarize Sue's class

Range = 9

Interquartile Range = 5

Median = 9

For Marc's class: (on the top)

As you can see the maximum and minimum values are

Maximum = 10 and Minimum = 1

So the Range becomes = 10 - 1 = 9

The upper quartile Q3 is 9 and lower quartile Q1 is 3

So the Interquartile Range becomes = 9 - 3 = 6

This Interquartile Range represents the 25 to 75 percentile of the data

There is little vertical line skewed to the left represents the Median = 5

So to summarize Marc's class

Range = 9

Interquartile Range = 6

Median = 5

Conclusion:

The range of both box-pots is same (9) but the interquartile range of box-plots is different (6 and 5).

Therefore, we can confidently conclude that option D is the correct answer.

The odds against an event are 4:7. Find the probability that that event will occur

Answers

Answer:

3:7 or .4285

Step-by-step explanation:

the odds against are 4:7 so the odds with must be 7-4=3

which will be written in 3:7 form

The object below was made by placing a cone on top of a cylinder. The base of the cone is congruent to the base of the cylinder.1) What is the volume, in cubic centimeters, of the object? Explain how you found the volume of the (2) smaller shapes.2) Then explain how you found the volume of the total shape.**Do not just show your answer. Explain your steps and the numbers you used.**Did you use radius? Height? Diameter? Base? Pi (3.14)?

Answers

Answer:

Part 1) The volume of the object is [tex]32\pi\ cm^{3}[/tex]  or [tex]100.48\ cm^{3}[/tex]

Part 2) see the procedure

Step-by-step explanation:

The picture of the question in the attached figure

Part 1)  What is the volume, in cubic centimeters, of the object?

we know that

The volume of the object is equal to the volume of the cylinder plus the volume of the cone

Find the volume of the cone

The volume of the cone is equal to

[tex]V=\frac{1}{3}\pi r^{2} h[/tex]

we have

[tex]r=4/2=2\ cm[/tex] -----> the radius is half the diameter

[tex]h=3\ cm[/tex]

substitute the values

[tex]V=\frac{1}{3}\pi (2^{2})(3)=4\pi\ cm^{3}[/tex]

Find the volume of the cylinder

The volume of the cylinder is equal to

[tex]V=\pi r^{2} h[/tex]

we have

[tex]r=4/2=2\ cm[/tex] -----> the radius is half the diameter

[tex]h=(10-3)=7\ cm[/tex]

substitute the values

[tex]V=\pi (2^{2})(7)=28\pi\ cm^{3}[/tex]

Part 2) Then explain how you found the volume of the total shape

The volume of the total shape is equal to the volume of the cylinder plus the volume of the cone

[tex]4\pi\ cm^{3}+28\pi\ cm^{3}=32\pi\ cm^{3}[/tex] ------> exact value

Find the approximate value of the volume

assume

[tex]\pi=3.14[/tex]

[tex]32(3.14)=100.48\ cm^{3}[/tex]

Answer:

Step-by-step explanation:

The average person in North Carolina will eat about 12,300 pounds of sugar in a 70 or one lifespan about how many pounds of sugar does the average person in North Carolina eat a year

Answers

Answer:

The sugar does the average person in North Carolina eat in a year =  175.71 pounds.

Step-by-step explanation:

The person eat sugar in 70 year life span = 12300 pounds

The same person eat sugar in one year = [tex]\frac{12300}{70}[/tex]

                                                                  = 175.71 pounds

Thus the person eat about 175.71 pounds of sugar in a year.

In a shipment of 2,000 beach balls 150 are defective the manufacturer generates a random sample to simulate 20 beach balls to inspect in the next shipment the integers 1 to 150 represent defective beach balls

Answers

The concluding part of the question as obtained from the textbook;

The number on the 20 beach balls that come up in the simulated sample:

42, 1701, 638, 397, 113, 1243, 912, 380, 769, 1312, 76, 547, 721, 56, 4, 1411, 1766, 677, 201, 1840

A) Based on this sample, how many

defective beach balls might the

manufacturer expect in the next

shipment?

B) What is the difference between the

number of defective beach balls in the

actual shipment and the number

predicted in the next shipment?

Answer:

A) 500 defective beach balls.

B) Difference between the

number of defective beach balls in the

actual shipment and the number

predicted in the next shipment = 350

Step-by-step explanation:

The beach balls are labelled 1 to 2000 with the 150 defective ones labelled 1 to 150.

Then a random sample of 20 beach balls is picked, and the numbers are presented as

42, 1701, 638, 397, 113, 1243, 912, 380, 769, 1312, 76, 547, 721, 56, 4, 1411, 1766, 677, 201, 1840

Note that only the defective beach balls have numbers 1 to 150.

A) The number of beach balls with numbers from 1 to 150 in the sample is 5 (numbers 42, 113, 76, 56, 4). This is the number of defective beach balls in the sample.

Probability of getting a defective ball in the next shipment = (5/20) = 0.25

If every shipment contains 2000 beach balls, then there will be (0.25 × 2000) defective beach balls in the next sample; 500 defective beach balls.

B) Number of defective beach balls in actual shipmemt = 150

Number of predicted defective beach balls in the next shipment = 500

difference = 500 - 150 = 350.

Hope this Helps!!!

Answer:

C.) 500

Step-by-step explanation:

In a shipment of 2,000 beach balls, 150 are defective. The manufacturer generates a random sample to simulate 20 beach balls to inspect in the next shipment. The integers 1 to 150 represent defective beach balls.

   42         1701         638         397          113  

1243          912         380          769       1312

   76           547         721            56              4

1411         1766        677          201       1840

12. Based on this sample, how many defective beach balls might the manufacturer expect in the next shipment?

Group of answer choices

A.) 100

B.) 200

C.) 500

D.) 1000

Which of the following are ordered pairs for the equation y = 1/8x + 11?


(0,11) (8,12) (16,13)


(0,11) (7,13) (8,15)


(0,11) (5,12) (7,13)


(0,11) (6,12) (8,13)

Answers

Answer:

Again, A.

Step-by-step explanation:

Just graph the equation, but you can tell just by looking at it that (0,11) is the y-intercept meaning that it's one of the answer choices.

The first one would be the answer

Brian is moving his 18 books. He has packed an equal number of books into each 5 empty boxes. How many books are in each box? How many books are left over?

Answers

Answer:

3 books per box, 3 left over.

Step-by-step explanation:

Brian has 18 books, and he is packing them into 5 boxes. 18 is only divisible by 1, 3, 9, and 18.

1 x 5 = 5 books =  13 left over. Still enough to pack more books.

3 x 5 = 15 books = 3 left over. This is the answer, but let's check the others as well.

9 x 5 = 45 books. He doesn't have that many! He can't put 9 books in each box because it would only take 2 boxes he's using all 5.

18 x 5 = 90 books. We can clearly see this isn't the answer. He would only be able to put all 18 books in 1 box but he wants to use all 5 boxes.

There are 3 books in each box with 3 left over.

Final answer:

Brian has 3 books in each of the 4 boxes, with 3 books remaining as leftovers after packing them equally.

Explanation:

Brian is moving his 18 books and has packed an equal number of books into each of the 5 empty boxes. To find out how many books are in each box, we divide the total number of books by the number of boxes, which is = 18 books ÷ 5 boxes = 3 books per box with 3 books left over. Therefore, there will be 3 full boxes and one box with 3 leftover books.

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A man cycling along the road noticed that every 12 minutes a bus overtakes him and every 4 minutes he meets an oncoming bus. If all buses and the cyclist move at a constant speed, what is the time interval between consecutive buses

Answers

Answer:

Step-by-step explanation:

Let the speed of cyclist be C and bus be B.

Using the concept of relative speed:-

For incoming bus,speed = B + C

For overtaking bus,speed = B - C

Now,distance travelled b/w 2 incoming bus = (B + C)*4

Now,distance travelled b/w 2 overtaking bus = (B - C)*12

so,

(B + C)*4 = (B - C)*12

or, B=2C

Hence,distance b/w two buses in same direction,d=4*(3/2)B=6 B

Therefore, time gap=d/B=6 minutes

Time interval between consecutive buses is 6 minutes, determined using relative speeds and given overtaking and meeting intervals.

To solve this problem, let's denote the following:

- [tex]\( v_c \)[/tex] is the speed of the cyclist.

- [tex]\( v_b \)[/tex] is the speed of the buses.

- [tex]\( t \)[/tex] is the time interval between consecutive buses.

Step-by-Step Solution:

1. Relative Speed in the Same Direction:

  When a bus overtakes the cyclist, it means the bus is catching up to the cyclist from behind. The relative speed of the bus with respect to the cyclist is:

  [tex]\[ v_b - v_c \][/tex]

  According to the problem, a bus overtakes the cyclist every 12 minutes:

  [tex]\[ v_b - v_c = \frac{d}{12} \][/tex]

  where [tex]\( d \)[/tex] is the distance between consecutive buses.

2. Relative Speed in the Opposite Direction:

  When the cyclist meets an oncoming bus, they are moving towards each other. The relative speed is:

  [tex]\[ v_b + v_c \][/tex]

  According to the problem, the cyclist meets an oncoming bus every 4 minutes:

  [tex]\[ v_b + v_c = \frac{d}{4} \][/tex]

3. Setting Up Equations:

  From the given information, we have two equations:

  [tex]\[ v_b - v_c = \frac{d}{12} \][/tex]

  [tex]\[ v_b + v_c = \frac{d}{4} \][/tex]

4. Solving for [tex]\( d \)[/tex] and [tex]\( t \)[/tex]  :

  Let's add these two equations to eliminate [tex]\( v_c \)[/tex]:

  [tex]\[ (v_b - v_c) + (v_b + v_c) = \frac{d}{12} + \frac{d}{4} \][/tex]

  [tex]\[ 2v_b = \frac{d}{12} + \frac{d}{4} \][/tex]

  [tex]\[ 2v_b = \frac{d}{12} + \frac{3d}{12} \][/tex]

  [tex]\[ 2v_b = \frac{4d}{12} \][/tex]

  [tex]\[ 2v_b = \frac{d}{3} \][/tex]

  Multiply both sides by 3:

  [tex]\[ 6v_b = d \][/tex]

  Now, substitute [tex]\( d = 6v_b \)[/tex] back into either equation, let's use [tex]\( v_b + v_c = \frac{d}{4} \)[/tex]:

  [tex]\[ v_b + v_c = \frac{6v_b}{4} \][/tex]

  [tex]\[ v_b + v_c = 1.5v_b \][/tex]

  [tex]\[ v_c = 0.5v_b \][/tex]

5. Finding the Time Interval [tex]\( t \)[/tex]:

  We already established that the distance between consecutive buses is [tex]\( d = 6v_b \)[/tex].

  The time interval [tex]\( t \)[/tex] between consecutive buses can be found using the speed of the buses:

  [tex]\[ t = \frac{d}{v_b} \][/tex]

 [tex]\[ t = \frac{6v_b}{v_b} \][/tex]

  [tex]\[ t = 6 \text{ minutes} \][/tex]

So, the time interval between consecutive buses is 6 minutes.

An article reported that the mean annual adult consumption of wine was 3.85 gallons and that the standard deviation was 6.07 gallons. Would you use the empirical rule to approximate the proportion of adults who consume more than 9.92 gallons (i.E., the proportion of adults whose consumption value exceeds the mean by more than 1 standard deviation)? Explain your reasoning. (Round your numerical answer to three decimal places.)

Answers

Final answer:

To approximate the proportion of adults consuming more than 9.92 gallons of wine annually, we can use the empirical rule.

Explanation:

To approximate the proportion of adults who consume more than 9.92 gallons, we can use the empirical rule. The empirical rule states that approximately 68% of the data falls within one standard deviation of the mean, approximately 95% falls within two standard deviations, and approximately 99.7% falls within three standard deviations. Since we want to find the proportion of adults consuming more than 9.92 gallons, which is more than 1 standard deviation above the mean, we can estimate that it would be approximately 32% based on the empirical rule.

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The king of noble girth said, "you there, victualer, have you procured the food for the upcoming wedding feast?" "No sire," he meekly replied, "I did not know how much of each i was to get." "Listen carefully, and do what i say," growled the king. "one hubdred eighty head fo bird and beast, you are to cook my great feast. 500 feet they have to stand on, the number of each you now must stand on."

Answers

Final answer:

The subject of this question is Mathematics. The student needs to determine the number of birds and beasts the victualer needs to get for the upcoming wedding feast.

Explanation:

The subject of this question is Mathematics.

The student is being asked to determine how much of each bird and beast the victualer needs to get for the upcoming wedding feast. The king specifies that there should be a total of 180 heads of bird and beast, and the number of feet should be 500. The student needs to calculate the number of each bird and beast that satisfies these conditions.

To solve this problem, we can set up a system of equations. Let x be the number of birds and y be the number of beasts. We have the following two equations:

x + y = 180 (equation 1)

2x + 4y = 500 (equation 2)

We have equation 1 to represent the total number of heads, and equation 2 to represent the total number of feet. We can solve this system of equations to find the values of x and y that satisfy both equations.

In equation 1, we can solve for x in terms of y: x = 180 - y. We can substitute this value of x in equation 2 to get:

2(180 - y) + 4y = 500

Simplifying this equation gives: 360 - 2y + 4y = 500

Combining like terms: 2y = 140

Dividing both sides by 2: y = 70

Substituting this value of y in equation 1 gives: x = 180 - 70 = 110

So, the victualer needs to get 110 birds and 70 beasts for the upcoming wedding feast.

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please look at this multiple choice, thanks!

Answers

Step-by-step explanation:

[tex] \frac{y - y1}{x - x1} = \frac{y2 - y1}{x2 - x1} [/tex]

[tex] \frac{y - 0}{x - ( - 1)} = \frac{3 - 0}{1 - ( - 1)} [/tex]

[tex] \frac{y}{x + 1} = \frac{3}{1 + 1} [/tex]

[tex] \frac{y}{x + 1} = \frac{3}{2} [/tex]

[tex]y = \frac{3}{2} (x + 1)[/tex]

[tex]y = \frac{3}{2} x + \frac{3}{2} [/tex]

option B

Trigonometry
Angle Sum and Difference, Double Angle and Half Angle Formulas
Find the exact value of:
Cos 20* cos 45* + sin 20* sin 45*

Answers

Answer:

cos(25)

Step-by-step explanation:

cosAcosB + sinAsinB = cos(A-B)

cos(20)cos(45) + sin(20)sin(45)

= cos(20-45) = cos(-25)

= cos(25) or 0.906

Please help
Trig: Laws of Cosines.
In Δ ABC , side a =3, side b =15 and m < C= 108* . Find side ' c' to the nearest integer.

Answers

Answer: 16

Step-by-step explanation:

law of cosines says that c^2 = a^2 + b^2 -2abcosC

so c^2 = 3^2 +15^2 - 2*2*15*cos108

c^2 = 234 -  (-27.8115294937 )

c^2 = 261.811529494

c = 16.18 rounds to 16

Answer:

16

Step-by-step explanation:

c² = a² + b² - 2(a)(b)cos(C)

c² = 3² + 15² - 2(3)(15)cos(108)

c² = 261.8115295

c = 16.18059114

Alan is writing out the steps using the "shortest Route Algorithm". On the second step, he just circled the route ABD as the shortest route from A to D. What should he cross out next?



Group of answer choices

AB; 2

AC; 4

AD; 6

ABE; 8

Answers

Answer:

Cross out Ab

Step-by-step explanation:

Answer: AD; 6

Step-by-step explanation:

using the shortest route algorithm. The next shortest route to AD would be AD; 6.

What is the y- value of the solution to the linear system below?

Answers

Answer: y = 6

y = -3x - 12

y = 3x + 24

Use elimination method to get 2y = 12 so y = 6.

Answer: the last option is the correct answer.

Step-by-step explanation:

The given system of equations is expressed as

y = - 3x - 12- - - - - - - - - - - - -1

y = 3x + 24- - - - - - - -- - - - - - -2

We would apply the method of elimination. Since x has the same coefficient and the sign is opposite, we would eliminate x by adding equation 1 to equation 2. It becomes

y + y = - 3x + 3x - 12 + 24

2y = 12

Dividing the left hand side and the right hand side of the equation by 2, it becomes

2y/2 = 12/2

y = 6

Solve 1/3 x = -4/5????

Answers

Answer:

x = −2.4

Step-by-step explanation:

Solve for x by simplifying both sides of the equation, then isolating the variable.

Exact Form: x = −12/5

Decimal Form: x = −2.4

Is a chi-square goodness of fit test always applied to a one way table?

Answers

Answer:

Yes

Step-by-step explanation:

A chi-square test (y) examine whether it is good enough to fit, and associates a detected dispersal of Categorical data to the theorized dispersal shown in one-way table demonstrations distribution. If we get an empty hypothesis of the Chi test, it means no relationship exists between the categorial variables in the population, and they are not dependent on each other.

5. We want to compare two different groups of students, students taking Composition 1 in a tradition lecture format and students taking Composition 1 in a distance learning format. We know that the mean score on the research paper is 85 for both groups. What additional information would be provided by knowing the standard deviation?

Answers

Answer:

By knowing the standard deviation, one gets the idea of how the value is scattered or dispersed about the mean.

Step-by-step explanation:

Let us first define standard deviation.

As it is known that the standard deviation is a measure of dispersion which express the spread of observation in terms of the average of deviations of observations from some central values.

Measure of dispersion gives us an idea about homogeneity or heterogeneity of the distribution.

Standard deviation is supposed almost an ideal measure of dispersion except the general nature of extracting the square root.  

Thus for the given question, if we want to compare the two different groups of students whose mean score is 85. Here the standard deviation for both the groups interprets an idea about how the individual score for each group scattered or varied about the mean score i.e. 85.

Kayla rented a boat. There was a one-time charge of $100 plus an hourly rate of $45. Her total cost for the day was $370. Which equation, when solved for x, gives the number of hours she rented the boat? A) 45x + 100 = 370 B) 45x − 100 = 370 C) 45x + 370 = 100 D) 45x − 370 = 100

Answers

The answer is 'A' twinks!!

The equation that represents her total cost for the day is

A) 45x + 100 = 370

What is an equation?

An equation is written in the form of variables and constants separated by the operation of multiplication and division,

An equation states that terms in different forms on both sides of the equality sign are equal.

Multiplication and division do not separate the terms of an equation.

Given, Kayla rented a boat.

There was a one-time charge of $100 plus an hourly rate of $45.

Assuming no. of hours to be x and total cost to be c(x).

∴ c(x) = 45x + 100.

Her total cost for the day was $370.

370 = 45x + 100.

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Subscriptions to a fashion magazine have gone down by a consistent 5% each year. If the magazine currently has 25,000 subscribers, how many will there be in 6 years?

Answers

After 6 years the number of subscribers are 16500.

What is Percentage?

percentage, a relative value indicating hundredth parts of any quantity.

Given that Subscriptions to a fashion magazine have gone down by a consistent 5% each year.

The magazine currently has 25,000 subscribers.

We need to find the number of subscribers after 6 years.

[tex]A=Pe^{rt}[/tex]

where r is rate of interest

t is the time

p is the initial subscribers

[tex]A=25000e^{0.05(6)}[/tex]

[tex]A=25000e^{0.3}[/tex]

A=25000(1.34)

A=33500

As it is going down so we need to subtract 33500-25000

8500

So from initial subscribers 8500 are left.

250000-8500

16500

Hence, after 6 years the number of subscribers are 16500.

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a. Write the first four terms of the series.

b. Does the series diverge or converge?

c. If the series has a sum, find the sum. Show your work.

Answers

Step-by-step explanation:

a. The first four terms are:

-4 (⅓)¹⁻¹ = -4

-4 (⅓)²⁻¹ = -4/3

-4 (⅓)³⁻¹ = -4/9

-4 (⅓)⁴⁻¹ = -4/27

b. This is a geometric series.  Since the absolute value of the common ratio is less than 1 (|⅓| < 1), the series converges.

c. The series converges to the sum of:

S = a₁ / (1 − r)

S = -4 / (1 − ⅓)

S = -6

1. Consider the inequality 2x < 6(2).

a. Write the inequality to describe the possible values of x.

b. What could you do to both sides of the original inequality to determine your answer to part (a)?

Answers

We want

[tex]2x<6\cdot 2=12[/tex]

So, if we divide both sides by 2, we have

[tex]x<6[/tex]

So, we can accept all values for [tex]x[/tex], as long as they are less than 6 (excluded)

Answer:

a) 2x < 6(2)

x < 6

x can take any real value less than 6

b) divide both sides by 2;

Or multiply both sides by ½

Ridge trail is 3/4 mile long. Valley trail is 7/12 mile long. Crystal brook trail is 2/3 mile long. Write the names of the trails in order from shortest trail to longest trail

Answers

Answer:

The answer to your question is below

Step-by-step explanation:

Process

1.- Convert the lengths to the same denominator (12)

Ridge trail        3 /4 mile =     3(3) / 12 =  9/12

Valley trail        7/12 mile =                   = 7/12

Crystal brook    2/3 mile =    4(2) / 12  = 8/12

2.- Order from shortest to longest

a) Valley trail

b) Crystal brook

c) Ridge trail

Answer:

Ridge trail, Valley trail, Crystal Brook trail

Step-by-step explanation:

3/4 --> 9/12

2/3 --> 8/12

7/12

Convert the following radian angle into degrees.

Answers

The degree of the radian angle 0.11 is [tex]6.3^{\circ}[/tex]

Explanation:

It is given that the radian angle is 0.11

We need to determine the degrees of the radian angle.

To convert the radian into degrees, let us multiply the radian with [tex]\left(\frac{180}{\pi}\right)[/tex]

Thus, we have,

[tex]0.11\times\left(\frac{180}{\pi}\right)=\frac{19.8}{\pi}[/tex]

It is given that [tex]\pi=3.14[/tex]

Substituting [tex]\pi=3.14[/tex] in the above expression, we have,

[tex]\frac{19.8}{3.14} =6.303...[/tex]

Rounding off to the nearest tenth, we have,

[tex]6.3^{\circ}[/tex]

Thus, the degree of the radian angle 0.11 is [tex]6.3^{\circ}[/tex]

WILL MARK BRAINLIEST Suppose MyBook sent out 950 surveys. Which of these numbers of surveys being returned would prevent nonresponse bias?
A.95B.190C.9D.950

Answers

Answer:

C) 9

Step-by-step explanation:

The response is very low

Answer: 950, option D

Step-by-step explanation:

Adequate response rate from participants prevents non response bias.

Non-response bias can be said to occur when response rates from participants is below 60%.

Meanwhile, all other options are less than or equals 20% respond rate, while 950 implies 100% response rate.

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