elimination . please help
User Generated
xrfunjazpynheva@tznv
Mathematics
Description
solve the following system of equations using elimination
4x - 2y =8
3x - 9y = -54
User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.
This question has not been answered.
Create a free account to get help with this and any other question!
24/7 Homework Help
Stuck on a homework question? Our verified tutors can answer all questions, from basic math to advanced rocket science!
Most Popular Content
2 pages
Pre Calculus Ellipses And Hyperbolas
(a) Explain how the equation of a hyperbola and an ellipse are related. So, both equations are equals to 1 and the main di ...
Pre Calculus Ellipses And Hyperbolas
(a) Explain how the equation of a hyperbola and an ellipse are related. So, both equations are equals to 1 and the main differences is that the ...
HLTH 501 Penn State Technology and Suicide Among School Age Youth Discussion
Describe the study sample.Compare risk factors in men and women.What characteristics are associated with BMI?Who is most ...
HLTH 501 Penn State Technology and Suicide Among School Age Youth Discussion
Describe the study sample.Compare risk factors in men and women.What characteristics are associated with BMI?Who is most likely to have prevalent coronary heart disease?Describe the Data collection Methods used in the studyPlease Provide a Summary of the data analysis as a whole . Summary should include pertinent information of all the questions above. This summary should not exceed 300 words. 1. Complete the following table to describe the study sample using data collected at the first examination for each participant (n = 4434). Summarize your results in three to four sentences. Patient Characteristic* Total Sample (n = 4434) Age, years 49.93 (8.68) Male sex 1944 (43.84) Systolic blood pressure, mmHg 132.91 (22.42) Diastolic blood pressure, mmHg 83.08 (12.06) Use of anti-hypertensive medication 144 (3.29) Current smoker 1944 (43.84) Total serum cholesterol, mg/dL 236.98 (44.65) Body mass index 25.85 (4.10) Diabetes 121 (2.73) * Mean (Standard deviation) or n (%) 2. Complete the following table to compare men and women using data collected at the first examination for each participant (n = 4434). Summarize your results in three to four sentences. Patient Characteristic* Men (n = 1944) Women (n = 2490) Age, years 49.79 (8.72) 50.03 (8.64) Systolic blood pressure, mmHg 131.74 (19.44) 133.82 (24.46) Diastolic blood pressure, mmHg 83.71 (11.44) 82.60 (12.50) Use of anti-hypertensive medication 42 (2.19) 102 (4.16) Current smoker 1175 (60.44) 1006 (40.40) Total serum cholesterol, mg/dL 233.58 (42.36) 239.68 (46.22) Body mass index 26.17 (3.41) 25.60 (4.56) Diabetes 59 (3.04) 62 (2.49) * Mean (Standard deviation) or n (%) 3.Use simple and multivariable linear regression analysis to complete the following table relating the characteristics listed to BMI as a continuous variable. Before conducting the analysis, be sure that all participants have complete data on all analysis variables. If participants are excluded due to missing data, the numbers excluded should be reported. Then, describe how each characteristic is related to BMI. Are crude and multivariable effects similar? What might explain or account for any differences? Outcome Variable: BMI, kg/m2 Characteristic Regression Coefficient Crude Models p-value Regression Coefficient Multivariable Model p-value Age, years 0.0627 <0.001 -0.02155 0.004 Male sex -0.580 <0.001 -0.9884 <0.001 Systolic blood pressure, mmHg 0.0603 <0.001 0.05716 <0.001 Total serum cholesterol, mg/dL 0.0113 <0.001 0.00638 <0.001 Current smoker -1.4017 <0.001 -1.2818 <0.001 Diabetes 2.2918 <0.001 1.2355 0.001 4. Test if there are significant differences in the following risk factors between persons with and without prevalent coronary heart disease (CHD). Summarize the statistical results in the table below and then compare risk factors in persons with and without prevalent CHD. Be sure to indicate what statistical tests were used in the footnote to the table and in a brief summary of a paragraph or less. Patient Characteristic* History of CHD (n = 194) No History of CHD (n = 4240) p-value* Age, years 57.48 (7.42) 49.58 (8.57) <0.001 Systolic blood pressure, mmHg 144.99 (27.03 132.35 (22.03) <0.001 Diastolic blood pressure, mmHg 87.14 (14.33) 82.90 (11.91) <0.001 Total serum cholesterol, mg/dL 243.19 (45.61) 236.69 (44.6) 0.0486 Body mass index 26.83 (4.45) 25.80 (4.08) <0.001 * Mean (Standard deviation). P-values are based on two independent samples t tests.5. Describe the Data collection Methods used in the study6. Please Provide a Summary of the data analysis as a whole . Summary should include pertinent information of all the questions above. This summary should not exceed 300 words.
Limits and Continuity (23 Multiple Choice)
1.Using the graph of f(x) below, find (4 points) −5Does not exist01.72.Find . (4 points)0Does not exist3.What is ? (4 ...
Limits and Continuity (23 Multiple Choice)
1.Using the graph of f(x) below, find (4 points) −5Does not exist01.72.Find . (4 points)0Does not exist3.What is ? (4 points)∞0−4−∞4.What is ? (4 points)0-101Does not exist5.Find the limit of the function by using direct substitution (4 points)Does not exist05-51.If and , then . (4 points)TrueFalse2.Find the limit of the function algebraically. (4 points)5110Does not exist3.Find . (4 points)210Does not exist4.Evaluate . (4 points)-110Does not exist5.Evaluate . (4 points)01Does not exist1.Evaluate (6 points)∞−∞02.Find the equation of the horizontal asymptote for the function, . (7 points)There is no horizontal asymptote.y = 0y = 1y = x3.Which of the following is false for ? (7 points)The y-axis is not an asymptote of f(x).The x-axis is an asymptote of f(x).x = -1 is not an asymptote of f(x).x = 1 is an asymptote of f(x).1.To two decimal places, find the value of k that will make the function f(x) continuous everywhere. (4 points)1.889.003.76None of these2.Where is discontinuous? (4 points)-2-2, 44f(x) is continuous everywhere3.Is the function continuous? (4 points)YesNo4.List the discontinuities for the function f(x) = cot( ). (4 points)n( ), where n is an integern( ), where n is an integern( ), where n is an integerThere are no discontinuities.5.Which of the following is true for ? (4 points)There is a non-removable discontinuity at x = 2.There is a removable discontinuity at x = 2.The function is continuous for all real numbers.1.What is the instantaneous slope of y = at x = -3? ( 4 points)2.What is the average rate of change of y with respect to x over the interval [-2, 6] for the function y = 5x + 2? (4 points)52103.What is the slope for the function y = -5x2 + 2 at the point x = 1? (4 points)-5-10-3The slope cannot be determined.4.The surface area, S, of a sphere of radius r feet is S = S(r) = 4πr2. Find the instantaneous rate of change of the surface area with respect to the radius r at r = 4. (4 points)32π16π64π4π5.A ball is thrown vertically upward from the top of a 100 foot tower, with an initial velocity of 10 ft/sec. Its position function is s(t) = -16t2 + 10t + 100. What is its velocity in ft/sec when t = 2 seconds? (4 points)-32-38-5480
9 pages
MAT540 Homework Week 4 Page 1 of 5 MAT540 Week 4 Homework Chapter 15 1. The manager of the Carpet Ci
MAT540 Homework
Week 4
Page 1 of 5
MAT540
Week 4 Homework
Chapter 15
1. The manager of the Carpet City outlet needs ...
MAT540 Homework Week 4 Page 1 of 5 MAT540 Week 4 Homework Chapter 15 1. The manager of the Carpet Ci
MAT540 Homework
Week 4
Page 1 of 5
MAT540
Week 4 Homework
Chapter 15
1. The manager of the Carpet City outlet needs to make an accurate forecast of the demand for Soft Shag carpet (its biggest seller). If the manager does not order enough carpet from the carpet mill, customer will buy their carpet from one of Carpet City’s many competitors. The manager has collected the following demand data for the past 8 months:
Month
Demand for Soft Shag
Carpet (1,000 yd.)
1
10
2
9
3
8
4
9
5
10
6
12
7
14
8
11
a. Compute a 3-month moving average forecast for months 4 through 9.
b. Compute a weighted 3-month moving average forecast for months 4 through 9. Assign weights of 0.55, 0.35, and 0.10 to the months in sequence, starting with the most recent month.
c. Compare the two forecasts by using MAD. Which forecast appears to be more accurate?
2. The manager of the Petroco Service Station wants to forecast the demand for unleaded gasoline next month so that the proper number of gallons can be ordered from
Statistics on Excel, statistics homework help
Attached is a computer assignment and it is due May 4th. Please make sure to give all your answers on the Excel shee ...
Statistics on Excel, statistics homework help
Attached is a computer assignment and it is due May 4th. Please make sure to give all your answers on the Excel sheets (Pages 1-5),
Similar Content
----------------------------------------------------------------------------
Choose the graph which represents the solution to the inequality:-2x + 5 ≤ 11A)B)C)D)...
Statistics Questions
...
Practice applying set concepts by solving problems using Venn Diagrams
1. On a sheet of paper, solve the following Problem involving sets. Please show all of your work, including any computatio...
MATH 260 Kalamazoo Valley Community College Vector Functions Solved Practice
I need help with the MATH 260 homework attached. ...
Answering homework questions
basically, my homework is four sections but most of it is already answered I just want the rest to be done, just answer al...
Please help with this question. Thanks
A nationwide test taken by high school sophomores and juniors has three sections, each scored on a scale of to&...
Linear Programming
Value for P at the corner points: P = x + y Value for P at the corner points: P = x + 2y...
When You Mix X Liters Of The Weaker With Y Liters Of The Stronger You Will Get 2 Liters
When you mix x liters of the weaker with y liters of the stronger you will get 2 liters of the liquid thus...
Spc Answers
A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experienc...
Related Tags
Book Guides
The Lord of the Flies
by William Golding
Killers of the Flower Moon
by David Grann
The Remains Of The Day
by Kazuo Ishiguro
Their Eyes Were Watching God
by Zora Neale Hurston
The Metamorphosis
by Franz Kafka
Girl in Translation
by Jean Kwok
The Age of Innocence
by Edith Wharton
Othello
by Wiliam Shakespeare
Girl Stop Apologizing
by Rachel Hollis
Get 24/7
Homework help
Our tutors provide high quality explanations & answers.
Post question
Most Popular Content
2 pages
Pre Calculus Ellipses And Hyperbolas
(a) Explain how the equation of a hyperbola and an ellipse are related. So, both equations are equals to 1 and the main di ...
Pre Calculus Ellipses And Hyperbolas
(a) Explain how the equation of a hyperbola and an ellipse are related. So, both equations are equals to 1 and the main differences is that the ...
HLTH 501 Penn State Technology and Suicide Among School Age Youth Discussion
Describe the study sample.Compare risk factors in men and women.What characteristics are associated with BMI?Who is most ...
HLTH 501 Penn State Technology and Suicide Among School Age Youth Discussion
Describe the study sample.Compare risk factors in men and women.What characteristics are associated with BMI?Who is most likely to have prevalent coronary heart disease?Describe the Data collection Methods used in the studyPlease Provide a Summary of the data analysis as a whole . Summary should include pertinent information of all the questions above. This summary should not exceed 300 words. 1. Complete the following table to describe the study sample using data collected at the first examination for each participant (n = 4434). Summarize your results in three to four sentences. Patient Characteristic* Total Sample (n = 4434) Age, years 49.93 (8.68) Male sex 1944 (43.84) Systolic blood pressure, mmHg 132.91 (22.42) Diastolic blood pressure, mmHg 83.08 (12.06) Use of anti-hypertensive medication 144 (3.29) Current smoker 1944 (43.84) Total serum cholesterol, mg/dL 236.98 (44.65) Body mass index 25.85 (4.10) Diabetes 121 (2.73) * Mean (Standard deviation) or n (%) 2. Complete the following table to compare men and women using data collected at the first examination for each participant (n = 4434). Summarize your results in three to four sentences. Patient Characteristic* Men (n = 1944) Women (n = 2490) Age, years 49.79 (8.72) 50.03 (8.64) Systolic blood pressure, mmHg 131.74 (19.44) 133.82 (24.46) Diastolic blood pressure, mmHg 83.71 (11.44) 82.60 (12.50) Use of anti-hypertensive medication 42 (2.19) 102 (4.16) Current smoker 1175 (60.44) 1006 (40.40) Total serum cholesterol, mg/dL 233.58 (42.36) 239.68 (46.22) Body mass index 26.17 (3.41) 25.60 (4.56) Diabetes 59 (3.04) 62 (2.49) * Mean (Standard deviation) or n (%) 3.Use simple and multivariable linear regression analysis to complete the following table relating the characteristics listed to BMI as a continuous variable. Before conducting the analysis, be sure that all participants have complete data on all analysis variables. If participants are excluded due to missing data, the numbers excluded should be reported. Then, describe how each characteristic is related to BMI. Are crude and multivariable effects similar? What might explain or account for any differences? Outcome Variable: BMI, kg/m2 Characteristic Regression Coefficient Crude Models p-value Regression Coefficient Multivariable Model p-value Age, years 0.0627 <0.001 -0.02155 0.004 Male sex -0.580 <0.001 -0.9884 <0.001 Systolic blood pressure, mmHg 0.0603 <0.001 0.05716 <0.001 Total serum cholesterol, mg/dL 0.0113 <0.001 0.00638 <0.001 Current smoker -1.4017 <0.001 -1.2818 <0.001 Diabetes 2.2918 <0.001 1.2355 0.001 4. Test if there are significant differences in the following risk factors between persons with and without prevalent coronary heart disease (CHD). Summarize the statistical results in the table below and then compare risk factors in persons with and without prevalent CHD. Be sure to indicate what statistical tests were used in the footnote to the table and in a brief summary of a paragraph or less. Patient Characteristic* History of CHD (n = 194) No History of CHD (n = 4240) p-value* Age, years 57.48 (7.42) 49.58 (8.57) <0.001 Systolic blood pressure, mmHg 144.99 (27.03 132.35 (22.03) <0.001 Diastolic blood pressure, mmHg 87.14 (14.33) 82.90 (11.91) <0.001 Total serum cholesterol, mg/dL 243.19 (45.61) 236.69 (44.6) 0.0486 Body mass index 26.83 (4.45) 25.80 (4.08) <0.001 * Mean (Standard deviation). P-values are based on two independent samples t tests.5. Describe the Data collection Methods used in the study6. Please Provide a Summary of the data analysis as a whole . Summary should include pertinent information of all the questions above. This summary should not exceed 300 words.
Limits and Continuity (23 Multiple Choice)
1.Using the graph of f(x) below, find (4 points) −5Does not exist01.72.Find . (4 points)0Does not exist3.What is ? (4 ...
Limits and Continuity (23 Multiple Choice)
1.Using the graph of f(x) below, find (4 points) −5Does not exist01.72.Find . (4 points)0Does not exist3.What is ? (4 points)∞0−4−∞4.What is ? (4 points)0-101Does not exist5.Find the limit of the function by using direct substitution (4 points)Does not exist05-51.If and , then . (4 points)TrueFalse2.Find the limit of the function algebraically. (4 points)5110Does not exist3.Find . (4 points)210Does not exist4.Evaluate . (4 points)-110Does not exist5.Evaluate . (4 points)01Does not exist1.Evaluate (6 points)∞−∞02.Find the equation of the horizontal asymptote for the function, . (7 points)There is no horizontal asymptote.y = 0y = 1y = x3.Which of the following is false for ? (7 points)The y-axis is not an asymptote of f(x).The x-axis is an asymptote of f(x).x = -1 is not an asymptote of f(x).x = 1 is an asymptote of f(x).1.To two decimal places, find the value of k that will make the function f(x) continuous everywhere. (4 points)1.889.003.76None of these2.Where is discontinuous? (4 points)-2-2, 44f(x) is continuous everywhere3.Is the function continuous? (4 points)YesNo4.List the discontinuities for the function f(x) = cot( ). (4 points)n( ), where n is an integern( ), where n is an integern( ), where n is an integerThere are no discontinuities.5.Which of the following is true for ? (4 points)There is a non-removable discontinuity at x = 2.There is a removable discontinuity at x = 2.The function is continuous for all real numbers.1.What is the instantaneous slope of y = at x = -3? ( 4 points)2.What is the average rate of change of y with respect to x over the interval [-2, 6] for the function y = 5x + 2? (4 points)52103.What is the slope for the function y = -5x2 + 2 at the point x = 1? (4 points)-5-10-3The slope cannot be determined.4.The surface area, S, of a sphere of radius r feet is S = S(r) = 4πr2. Find the instantaneous rate of change of the surface area with respect to the radius r at r = 4. (4 points)32π16π64π4π5.A ball is thrown vertically upward from the top of a 100 foot tower, with an initial velocity of 10 ft/sec. Its position function is s(t) = -16t2 + 10t + 100. What is its velocity in ft/sec when t = 2 seconds? (4 points)-32-38-5480
9 pages
MAT540 Homework Week 4 Page 1 of 5 MAT540 Week 4 Homework Chapter 15 1. The manager of the Carpet Ci
MAT540 Homework
Week 4
Page 1 of 5
MAT540
Week 4 Homework
Chapter 15
1. The manager of the Carpet City outlet needs ...
MAT540 Homework Week 4 Page 1 of 5 MAT540 Week 4 Homework Chapter 15 1. The manager of the Carpet Ci
MAT540 Homework
Week 4
Page 1 of 5
MAT540
Week 4 Homework
Chapter 15
1. The manager of the Carpet City outlet needs to make an accurate forecast of the demand for Soft Shag carpet (its biggest seller). If the manager does not order enough carpet from the carpet mill, customer will buy their carpet from one of Carpet City’s many competitors. The manager has collected the following demand data for the past 8 months:
Month
Demand for Soft Shag
Carpet (1,000 yd.)
1
10
2
9
3
8
4
9
5
10
6
12
7
14
8
11
a. Compute a 3-month moving average forecast for months 4 through 9.
b. Compute a weighted 3-month moving average forecast for months 4 through 9. Assign weights of 0.55, 0.35, and 0.10 to the months in sequence, starting with the most recent month.
c. Compare the two forecasts by using MAD. Which forecast appears to be more accurate?
2. The manager of the Petroco Service Station wants to forecast the demand for unleaded gasoline next month so that the proper number of gallons can be ordered from
Statistics on Excel, statistics homework help
Attached is a computer assignment and it is due May 4th. Please make sure to give all your answers on the Excel shee ...
Statistics on Excel, statistics homework help
Attached is a computer assignment and it is due May 4th. Please make sure to give all your answers on the Excel sheets (Pages 1-5),
Earn money selling
your Study Documents