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Mathematics Questions and Answers April 11, 2021

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Question 8, 1.9.20 HW Score: 20%, 2 of 10 points Points: 0 of 1 Show that T is a linear transformation by finding a matrix that implements the mapping. Note that X1, X2, .. are not vectors but are entries in a vector. T ( X1 , *2 , *3, * 4 ) = 2X 1 - X 2 - X3 - * 4 (T: R 4 - R) A = Clear all Check answer View an example Get more help - 2:15 AM H Q
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An agent for a real estate company wanted to predict the monthly rent for apartments based on the size of the apartment. The data for a sample of 25 apartments is available below. Perform a t test for the slope to determine if a significant linear relationship between the size and the rent exists. a. At the 0.05 level of significance, is there
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Simplify the following by subtracting the polynomials. (8y3 - 5y2+ 2y+7) - (2y3 + 1 1y- 5y+4) (By3 - 5y2 + 2y+7) - (2y3 + 11y - 5y+4) = y=1 (Do not factor.)
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Construct a spanning tree based on kruskals algorithm Bruskal's algorithm works by Co a spanning truf 5 F C 3 12 P 5
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X is a Gaussian random variable with variance 9. It is known that the mean of X is positive. It is also known that the probability P[X ^ 2 > a] (using the standard Q-function notation) is given by [2] X is a Gaussian random variable with variance 9. It is known that the mean of X is positive. It is also known that the probability P [X2 > a] (using
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12. (09.06 LC) Based on the graph below, what are the solutions to the equation f(x) = g(x)? (5 points) 45 30 15 -3 f ( x ) -15 -30 g (x) -45 60 OX = -2.8, 0.6, -3.7 O X = -2, 1, 2 O X= -2, .5, 3.5 O X = -2, 2, 3
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1.Consider the function f(x) = \f
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Select all the correct answers. Which three statements are true about the energy flow in an ecosystem? ) The main source of energy for the ecosystem is the Sun. Producers convert radiant energy to chemical energy and provide for the entire ecosystem. Energy flows from carnivores to herbivores. The maximum amount of energy is received at the
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SECTION 2.4 PROBLEM SET: INVERSE MATRICES In problems 1- 2, verify that the given matrices are inverses of each other. 3 -3 -1 0 3 -4 2 2) 2 -4 2 3 3 -5 In problems 3- 6, find the inverse of each matrix by the row-reduction method. 0 3) 4) 0 1 2 0SECTION 2.4 PROBLEM SET: INVERSE MATRICES Problems 9-10: Express the system as AX = B; then solve
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Consider the following transshipment network for finding the shortest route from node 1 to node 7. 5 6 9 3 18 (a) Formulate a linear programming model of the problem. (Express your answers using x,, where each x,, is either 0 or 1 for the arc from node / to node j.) Min *17 X s.t. Node 1 Flows |X12 + *13 + *14= 1 Node 2 Flows Node 3 Flows Node 4
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6.Ace used-car sales manager Jack has no idea whether the $100,000 he pays for training for his used-car salespeople works. He asks Dave, the leading salesperson, and Dave says he thinks it works but can't really tell. So, Jack has hired your local helpful stats star and asked whether the training makes a difference. Here are the data?you tell
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Question2 12239 11H12Ella: ( 33 Q m Assignment3MAT2377F191v X Assignment-3-... [I] a/anog-la O MAT 2377C Fall 2019 Assignment 3 Deadline : Wednesday : Nov. 13 in class. Total mark:30 Note : Please answer the following questions,. You must give complete details in your solutions and clearly justify your nal answer. 1. Consider the random sample
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Completa la frase con la forma correcta del verbo sentarse. Francisco y yo juntos (together) en el autobs

A study is being conducted by a group of insurance brokers to analyze whether or not pet owners who do not have pet insurance would opt for medical treatment for their pet if the cost of the treatment exceeded $5,000. A random stratified sample of 154 pet owners without pet insurance was collected, and out of those sampled, 32 said they would opt

A cyclist is competing in a tournament. He is currently in a very hilly part of the tournament's course. For his current hill, his height in metres over time in minutes is modeled by the function f(x) = -0.00075x^2 - 0.5825x + 17.269. Estimate the bicyclist's instantaneous rate of change and give his direction at x = 100. Round your final answer

What strategy did the researchers use to deal with them? By having a control group, the researchers chose a group to help them measure the placebo effect. O By direct control, the researchers selected people with similar characteristics. O By using a single-blind experiment, the researchers kept people from reporting higher numbers for the

That is a homogeneous system of equations composed of 17 linear equations and 20 variables. If the matrix of the system's coefficients is rank 8, how many free parameters are there in the general solution of the system?381220179Question 2 Consider the road network below composed of streets that join intersections A, B, C, D and E. The arrows
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A sample of size 40 yields the following sorted data. Note that I have x-ed out x(39) (the second largest number). This fact will NOT prevent you from answering the questions below. 14.1 46.0 49.3 53.0 54.2 54.7 54.7 54.7 54.8 55.4 57.6 58.2 58.3 58.7 58.9 60.8 60.9 61.0 61.1 63.0 64.3 65.6 66.3 66.6 67.0 67.9 70.1 70.3 72.1 72.4 72.9 73.5 74.2

In an ANOVA test comparing several population means, if the alternative hypothesis is true, the F statistic tends to be close to zero. true or false

O d. A (t) = 100 + 25t O e. A(t) = 25 + 100t Clear my choice Using the functions in question 8 and 9, describe what happens to the total cost as 't' increases. O a. The total cost tends to 100, as t increases O b. The total cost tends to infinity in an exponential fashion, as t increases O c. The total cost tends to infinity in a linear fashion,

name the three types of frequency distributions and explain when each should be used.

Can you please help me understand how to get the answers to these questions and why you are correct?

Determine whether the integral is convergent or divergent. If it is convergent, evaluate it. (If the quantity diverges, enter DIVERGES.) Determine whether the integral is convergent or divergent. If it is convergent, evaluate it. (If the quantity diverges, enter DIVERGES.) 5 + 1The given curve is rotated about the y-axis. Find the area of the
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Determine the measures of central tendency (mean, median, mode) for each category within the data set. What is the mean? Use a calculator, if needed. What is the median? What is the mode?

Dawn wants to survey consumers to estimate how many ounces of dish washing liquid the average consumer uses per month. They want to be 90% confident in their estimate and have an acceptable magnitude of error of 3 ounces. The U.S. Detergent Association estimates the standard deviation for dish washing liquid usage per month is 86 ounces. If a

Need help on this statistics question please provide explanation 1. The Academy of Sports Medicine Physicians is interested in determining whether a new training regimen will help long-distance runners improve their perfonnance in marathons. This organization comes to you for some advice on how to design an experiment to test whether this new
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1.The diameter of the Douglas fir tree is measured at a height of 1.37 meters. The following data represent the diameter in centimeters of a random sample of 12 Douglas firs in the western Washington Cascades. 156 190 147 173 159 181 162 130 101 147 113 109 (a)Obtain a point estimate for the mean and standard deviation diameter of a Douglas fir
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12 A box contains 400 balls, each of which is blue, red, green, yellow or orange. The ratio of blue to red to green balls is | : 4 : 2. The ratio of green to yellow to orange balls is I : 3 :6. What is the smallest number of balls that must be drawn to ensure that at least 50 balls of one colour are selected
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omial function. f (x) = (x+1)(x-1)2(x-2) Answer the questions regarding the graph of f. Then, use this information to graph the function. (a) Choose the end behavior of the graph of f. Choose One (b) List each real zero of f according to the behavior of the graph at the X-axis near tha zero. If there is more than one answer, separate them with
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Tomework 7.3A + so + 2-x8 Solve for a and b. 2 = WS - SE - VA + XS- 0- = 38 -C+x8 8- = WA tsatia - x8 (2at b = 1 )- 3 8at Jb = - 3 20 = -6 as= 3 2. Add the matrices if possible. 1/ 2 1 - 3 ) +6 = 1 4eth = 1 b = 7 (0bee,88) .S to amnot ni enowens avid .moteye slinitni ads avloe [4 3] S = s+x S = S - X Le Solve the system algebraically. Check your
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Need help solving An object moves according to the parametric equations x = 4 cos(t) - 1 and y = 2 + 4 sin (t), for time, t, in seconds. Algebraically eliminate the parameter to obtain a rectangular equation, and identify the type of conic section represented
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a) its reference vector at this instant; b) which vectors for how long should be used to synthesize the reference vector for over the switching cycle. 3) Find the maximum ac voltage that the inverter can produce with SPWM, SVPWM, and 6- step operation. 3 mH Va V&=350 V E:40 Do Do Vard Va_ref Verd Yearrier Fig. 2. A sinusoidal PWM inverter
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What is the income distribution of super shoppers? A supermarket super shopper is defined as a shopper for whom at least 70% of the items purchased were on sale or purchased with a coupon. In the following table, income units are in thousands of dollars, and each interval goes up to but does not include the given high value. The midpoints are

1.The systolic blood pressure was measured for a random sample of 25 adults. A 95% confidence interval for the population average systolic pressure ranged from 123 to 139. Which of the following is true? A. If the sampling procedure would be repeated many times, 95% of the sample means would be between 123 and 139. B. In the sample, 95% of adults

)Is the mapping from Z10 toZ10 given byx2xa ring homomorphism?

2. Suppose Robin is unable to come up with an appropriate set of trade off weights. Assuming that any combination of weights is possible as long as all three are posi- tive and add up to 1, conduct a sensitivity analysis on the weights. Create a graph that shows the regions for which the different job offers are optimal (have the highest expected
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Practice z scores 1. I want to determine if using math models help students do better in Math class. We take 36 students and give them the Math models. (11 = 36) i. Write out the research and null hypotheses. Is this one or two tailed and why do you think so? ii. We know that the population of all Math students is normal with a mean of 65 and SD
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Can you conclude that the standard deviation of the breaking strength differs between the two composites? Use the ?=0.05 level of significance. Hockey sticks: The breaking strength of hockey stick shafts made of two different graphite-kevlar composites yields the following results (in Newtons). Composite 1: 525.6 536 533.9 528.1 526.8 537.6 522.6
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A parabola with focus F, of, 3, comma, minus, 4F(3,4) and directrix y, equals, 6y=6 contains the point A, left bracket, 3, comma, 1, right bracketA(3,1), its vertex. Find the distances from A (3,1) to the focus (3,-4) and the directrix y=6. What is FA and DA

Rewrite this into question format: The test could be administered with a time limit for each question, forcing participants to think quickly and make associations on the spot

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1- A regression was run to determine if there is a relationship between hours of TV watched per day (x) and number of situps a person can do (y). The results of the regression were: y =ax+b a =- 1.309 b = 25.753 r2 = 0.743044 r =- 0.862 Use this to predict the number of situps a person who watches 12.5 hours of TV can do (to at least one decimal

1.According to the National Health and Nutrition Examination Survey, published by the National Center for Health Statistics, the serum (noncellular portion of blood) total cholesterol level of US females 20 years old or older is normally distributed with a mean of 206 mg/dl and a standard deviation of 44.7 mg/dl. a.Determine the percentage of US

The data shown below represent the repair cost for a lowimpact collision in a simple random sample of mini- and micro-vehicles. Complete parts (a) through (d) below. $3148 $1039 $743 $663 $773 9 $1758 $3345 $2016 $2689 $1370 Click here to view the table of critical tvalues. Click here to view page 1 of the standard normal distribution table. Click
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Question: Give explanations with example the Shortcomings and Limitations of the Strategies (Conducting Campaigns Through flyer distribution, Communal work, Re -create the 3R Program (Reduce, Reuse, Recycle) Implemented (Minimum 6 weaknesses/limitations discussed)
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Type your answer (13 out of 20 Where does the polynomial y = x* + 2x + 1 cross the x-axis? (Give your answer as an ordered pair.)
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Math95 ( /S0pointsy Quiz 3 Name: 1.) Simplify the following expressions. 5, 49 b. log3() c. log,(log,(256)) 2.) Write the following in logarithmic form. a 25=64 b.n*=y 3.) Let (t) = 3(.5)" model the exponential decline of videocassette players sold (in millions) since the year 2000. Use logarithms to find what year the number of videocassette
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A DO YOUR FIGURING 24 4 16. A bag contains 11 marbles of identical size and shape: 2 green, 5 red, and 4 white. A marble is randomly pulled out of the bag. Without replacing the Ist marble, # 2nd marble will be randomly pulled out of the bag. Given that the Ist marble pulled out of the bag was white, what is the probability that the 2nd marble
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A random sample ofn measurements was selected from a population with standard deviation=19.6 and unknown mean . Calculate a99 % confidence interval for for each of the following situations: (a)n=50,x =104.3 (b)n=75,x =104.3 (c)n=105,x =104.3 (d) In general, we can say that for the same confidence level, increasing the sample sizethe margin of

Question 4 The style and Comfort Furniture Manufacturing Company wishes to determine production schedule for next quarter. The company produces four types on furniture, including sofas, love seats, recliners and coffee tables. The profit contribution from selling one sofa is 110$, one love seat is 1003, one recliner 150$ and one coffee table is
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please show the steps 3. (7 points) 1 Method of Least Squares Consider the points (0, l), (1,0), (2, 2). We would like to try and nd a line of the form f(w) = ma: + b which \"ts\" the data as well as possible. One method to do this is the following: for each of the three points (a, y) above compute the value d(a:,y) = y (ma: + b). For example:
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Select the choice that correctly completes the sentence below. To simplify x36, keep the base and multiply subtract divide add the exponents

Show that the following vectors span a plane; find three different bases for the plane, and show that all these bases generate the same plane (assume the plane contains the origin). <1,2,2>, <0,2,1>, <3,-2,2)

use the chair rule to compute ( f o r)/u and (f o r)/v at (u,v)= (1, /4) where f(x, y, z)= x^2y +y^2z+ z^2x and r(u, v) = (e^u cos(v), e^u sin(v), u^2).

Here is the problem set: 1. Imagine an innite chess board of square tiles as in the Figure below. You start with one whole piece of pie in the lower left hand corner, as you see in the rst diagram. At each stage you cut the amount of pie in half in one of the squares and distribute the two equal pieces to the squares to the immediate right and to
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A company that manufactures bicycles has a fixed cost of $200,000. It costs $200 to produce each bicycle. The selling price is $600 per bicycle. Let represent the number of bicycles produced and sold. a. Write a cost function representing the cost, (), of producing bikes.

A person will randomly select 5 cards from a deck of 52 cards. Each card is uniquely identified by a label which is a combination of a letter (one of the following: C, D, H, S) followed by a number (one of the following: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13). The labels on the cards are C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13,

Suppose that P is the price of a European put option to sell a security whose present price is S. Let K be the strike price of the option. Show that if P > K then there is a buying and/ or selling strategy that yields risk-less profit at expiration (i.c. arbitrage is present). You may assume the interest rate is r = 0 so that present value
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Testing the significance of Pearson's r requires both X and Y variables to be? distributed in the population. Positively Normally Negatively Abnormally

the gambling game Craps and the importance of rolling 'snake eyes', where you roll 2 dice simultaneously, and both show 1 pip. Using a Monte Carlo simulation, as above - but now with 2 dice - calculate the probability of rolling snake eyes.

psy7712 Toby was working on a math worksheet all by himself at the table. Toby then started to scream. The teacher then went over to Toby and consoled him. She also removed the math worksheet and gave him a teddy bear to soothe him. You observed this pattern of behavior in your observations

please refer to attachment You want to know if there is a difference in the proportion of students from urban vs. rural areas who have ever been tested for HIV, so you collect a random sample of 77 students with the following results: 24 as \" n Calculate the odds ratio of being HIV tested for rural compared to urban students. Round to three
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could some one help me /3 marks 3. Given the functions f(x) = x' - 3x - 10 and g(x) = x- - 5x, determine the equation(s) of the vertical asymptote(s) of the function h(x) = Ax) g(x)
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5 Was passt nicht? Circle the word in each row that does not belong. (7 x 2 pts. each = 14 pts.) 1. a. die Bettdecke b. der Herd c. das Kissen 2. a. dreckig b. ordentlich c. sauber3. a. die Bettdecke b. die Pfanne c. der Topf 4. a. die Waschmaschine b. die Kaffeemaschine c. der Waschetrockner 5. a. der Kuhlschrank b. die Spulmaschine c. der
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Graph it for me please Graph the inequality on the axes below. -xty
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Factor and simplify as required \f
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Find an equation for the function f that has the given derivative and whose graph passes through the given point: Derivative: f '(x)= - 2x sqrt(8-x 2 ) Point: (2,4)

3 x + 2 y + 7 z =38 9 x + 6 y + 21 z =114 0.6 x + 0.4 y + 1.4 z =7.6 Select one: a.{( x , y , z ) |3 x + 2 y + 7 z =38} b.{(-1,-4,7}) c.{(1,4,-7)} d.{ }

Water temperature affects the growth rate of brook trout. The table shows the amount of weight gained by brook trout after 24 days in various water temperatures. Temperature (C) 15.5 17.7 20.0 22.4 24.4 Weight gained (g) 37.6 31.5 19.8 9.5 9.9 If W ( x ) be the weight gain at temperature x , construct a table of estimated values for W . (Use a

Using the Afrobarometer Dataset a multiple regression analysis was performed with the outputs below. Based on these results a) What is the possible research question? b) What is the null hypothesis for the question? c) What research design would align with this question? d) What dependent variable was used and how is it measured? e) What

How many solutions does the following system have? 6: + 8y - 50 = 0 12 + yz = 25 O a 2 solutions O b no solutions O c infinitely many solutions Od 1 solution
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e. 60% Scores on a university exam Normally distributed with a mean of 78 and a standard deviation of 8. The professor teaching the class declares that a score of 70 or higher is required for a grade of at least "C." Using the 68-95- 99.7 (Empirical) rule, what percent of students score below 62? a. About 2.5% b. About 5% C. About 16% d. About 32%
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I am curious, when using a simple random sample, how would you do that with these killers? Would you do a list of female serial killers and then assign them random numbers and research those killers? I am just curious with such a specific sample how you would make sure it is still random and how you would determine which to look at if its a

answer the following questions using the following: Gym Usage per week (X) Income (in $) (Y) 3 29562 2 31836 4 30699 3 32973 4 35247 3 32973 3 35247 3 32973 5 35247 2 37521 3 36384 3 35247 4 36384 3 35247 3 38658 3 40932 2 34110 4 39795 4 38658 2 34110 4 38658 4 40932 4 42069 5 44343 2 45480 3 42069 4 46617 3 48891 2 45480 2 53439 3 39795 3 40932

Find the value of m to complete the square: x squared plus 7 x plus m equals 31 plus m

1992 registered voters were ask "Based on what you know, do you believe the United States is winning or losing the War in Afghanistan?" 23% responded we are winning. 38% responded we are losing. 39% responded Don't Know/No Opinion. The margin of error for the poll is 2.2%. What is the margin of error for this poll? Enter your answer as a percent

WR 227Online ProfessionalEmail Assignment Sheet Createa writingplan and an email in responseto each of the threescenarioslisted below. You will turn in a total of threewritingplans and threeemails In each writing plan and email, you should put into practice what you have learned about: Stating the main point clearly, right at the Organizing
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I don't understand how to do this 5. At 45, Anna set up a 401(k), where she plans to deposit $8,000 at the end of each year until age 75. Find the amount of the annuity if she invests in a stock fund that yields 8% compounded annually. O $978,766.96 $217,216.88 $512,954.20 $906,265.68
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Chapter 3 1. A park was interested in the average wait time at their most popular roller coaster at the peak park time (2 p.m.). They selected 13 patrons and had them get in line between 2 and 3 p.m. Each was given a stopwatch to record the time they spent in line. The times recorded were as follows (in minutes; mean = 114.15): Remember to briefly

2. Now we will verify your calculation by checking that the gradient Vf(:z:) is tangent to f (:13) at the point :13. Since we can only plot in two dimensions, we'll check that this is true by looking at how the function varies in a random direction '0. Let cc 6 R5 and 5 f(:z:) : log (2 ext) . i=1 (a) Pick a random point a: and a random direction
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Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to three decimal places where appropriate. If there is no solution, enter NO SOLUTION.) 2 sin (0) + cos(0) = 1 0 = 0 + 2kn XAn equation is given. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to three
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Please show all your steps and explanations. Thank you! 6. A Math Problem (8 points) For this exercise, give exact answers as simplified fractions. Compute E[X] and Var(X) if X has probability density function given by .. . f (20 ) = 1 0 ( c(1 - 24) if - 1
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Use your calculator to enter the following set of values and nd the _ regression equation. Write the equation for the line of best t. Use this equation to predict the y value if x: 9. (Round to the nearest whole number.) 0 It's not on the table. OY='1O Ov=f8 C) y= 11
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A researcher has conducted a study examining the effects of witnessing violence on externalizing behavior in 5th and 6th grade children. She administers the conflict tactics scale to the parent or parent substitute to assess the level of violence in the home. This measure produces two scales, one assessing whether or not the child has heard "long,

In order to estimate the average age, denoted by , of all eligible voters in Michigan Congressional District 14, three methods are used to form a point estimate. Method 1: randomly sample an eligible voter in the District and use his/her age as the point estimate, denoted by 1. Method 2: randomly sample 10 eligible voters in the District. For each

For each of the following, provide a minimal pair to satisfy the request. 1. Provide 3 minimal pair to show that /i/ and // are phonemes. 2. Provide 3 minimal pairs to show that /a/ and // are phonemes. 3. Provide 2 minimal pairs that shows /o/ and // are phonemes. 4. The mentioned one minimal pair showing that // and // are phonemes. What was it?

A computer router receives data packets that need to be transmitted to their destinations. The router operates in small time-slots that are such that on a given time-slot only two things can happen: either a packet is received or no packets are received. The probability that a packet is received during a given time-slot is p , independently of any

The current price of movie tickets is $20 and the venue can typically sells 500 tickets. However after a survey they found that for each $1 increase in price, 10 fewer tickets are sold. a) What is the price per ticket that will maximize revenue? b) What is the maximum revenue
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Al revisar las cuentas habidas desde la apertura de un restaurante hace seis meses, el dueo encontr que la cuenta promedio por pareja era de $26, con una desviacin estndar de $5.65 que tan grande tendra que ser una muestra de cliente para que la probabilidad fuera de al menos 95.44% de que el costo medio por comida para que la muestra cayera entre

Clark Company used the following data and the high-low method to determine that its variable cost per mile is $2.50 and its fixed costs are $70,000. Month Miles Total Cost January 160,000 $384,000 February 100,000 ? March 140,000 ? April 180,000 520,000 Which months were used in the high-low analysis? January and April O January and February O
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a . Is x^2+ y^2 = 4 , a function of x ? b, If Y^2=9x is y a function of x ?

The Customer Service Center in a large New York department store has determined that the amount of time spent with a customer about a complaint is normally distributed, with a mean of 9.1 minutes and a standard deviation of 2.5 minutes. What is the probability that for a randomly chosen customer with a complaint, the amount of time spent resolving

A health inspector analyzed the amount of sugar in 500 different snacks prepared in various school cafeterias, The collected data are shown in the following box-and-whisker diagram. H 11.5 12 13 18 20 Amount of sugar per snack in grams 3. State what 13 represents in the given diagram, [I mark] b. Write down the interquartile range for this data.
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1. In a family, denote Xn as the number of individuals in the n-th generation. Each individual independently reproduce into a random number of offspring who live in the next generation. This random number is 0 with probability p 2 , 1 with probability 2p(1 p), and 2 with probability (1 p) 2 . The parameter p is within the range of (0, 1/2). a.)

How to answer this Select the correct answer from each drop-down menu. A chess player moves a knight from the location (3, 2) to (5, 1) on a chessboard. If the bottom-left square is labeled (1, 1), the translation made is v . If the player moves the knight from (5, 1) to (6, 3), the translation made is
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A grocery store recorded its stock of pastry in the following table: Big Small Total FAt 111 74 185 LowFat 109 80 189 Creamy 80 46 126 Total 300 200 500 If one pie is selected at random, are the events "taking a small pie" and "taking a creamy pie" independent? The events are independent because P(creamy)=P(small, given creamy) The events are

Returns from two projects X and Y were recorded as follows X 5 8 2 7 5.5 Y 7 2 9 3.5 8 (a) Compute the mean return and the standard deviation of each project (b) Compute the covariance and correlation coefficient of these returns and comment on the results.

A sales manager estimates that 30% of all the employees in his department will respond to a year-end bonus by increasing their efforts (and sales) substantially. He can give a bonus to 10 of his 40 employees. If the manager selects bonus recipients at random, what is the probability that exactly 4 of the 10 bonus recipients will increase their

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