1 Marks- ---10 Solve the following system of equations- 12x + 8y - -1.docx

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1 Marks: --/10 Solve the following system of equations: 12x + 8y = -16 3x + 2y = -4 Choose one answer. a. (-1, -1) b. no solution c. (6, -5) d. infinite many solutions ..Question 2 Marks: --/10 Solve the following system of equations: 4x - 3y = -3 5x - 2y = -4 Choose one answer. a. (-6/7, -1/7) b. (6/7, 1/7) c. (-1/7, -6/7) d. (6/7, -1/7) ..Question 3 Marks: --/10 Solve the following system of equations: 3r + 3s = 9 3r - 6s = 18 Choose one answer. a. (5.5, 3) b. (4, -0.5) c. (4, -1) d. (2, -1) ..Question 4 Marks: --/10 Solve the following system of equations: 2y + 8x = 58 y - 5x = 11 Choose one answer. a. (21, 2) b. (4, 20) c. (1, 21) d. (2, 21) ..Question 5 Marks: --/10 Solve the following system of equations: 7x - 2y = 8 5x + 2y = 4 Choose one answer. a. (-Â½, 1) b. (1, -Â½) c. (2, -3) d. (-3, 2) ..Question 6 Marks: --/10 Solve the following system of equations: y = 11x - 6 y = -6x + 11 Choose one answer. a. (1, 7) b. (5, 1) c. (1, 5) d. (-1, 5) ..Question 7 Marks: --/10 Solve the following system of equations: 8x + 7y = 18 3x - 5y = 22 Choose one answer. a. (-2, 4) b. (4, -2) c. (4, 0) d. (3, -2) ..Question 8 Marks: --/10 Solve the following system of equations: -4x - 6y = -6 7x + 9y = -9 Choose one answer. a. (0, -1) b. (0, 1) c. (13. -18) d. (-18, 13) ..Question 9 Marks: --/10 Solve the following system of equations: Â½a + Â½b = 1 6a - 5b = 12 Choose one answer. a. (3, -0.5) b. (1, 0) c. (2, 0) d. (2, 0.25) ..Question 10 Marks: --/10 Solve the following system of equations: 2x + y = -1 4x + 2y = 2 Choose one answer. a. infinite many solutions b. no solution c. (-2, 3) d. (1, 2) Solution These are the answers that I came up with. Im following with the solutions 1D 2A 3C 4D 5B 6C 7B 8D 9C 10B .

Education

7x - 2y = 8
5x + 2y = 4
Choose one answer. a. (-Â½, 1)
b. (1, -Â½)
c. (2, -3)
d. (-3, 2)
..Question 6
Marks: --/10 Solve the following system of equations:
y = 11x - 6
y = -6x + 11
Choose one answer. a. (1, 7)
b. (5, 1)
c. (1, 5)
d. (-1, 5)
..Question 7
Marks: --/10 Solve the following system of equations:
8x + 7y = 18
3x - 5y = 22
Choose one answer. a. (-2, 4)
b. (4, -2)
c. (4, 0)
d. (3, -2)
..Question 8
Marks: --/10 Solve the following system of equations:
-4x - 6y = -6
7x + 9y = -9
Choose one answer. a. (0, -1)
b. (0, 1)
c. (13. -18)
d. (-18, 13)
..Question 9
Marks: --/10 Solve the following system of equations:
Â½a + Â½b = 1

6a - 5b = 12
Choose one answer. a. (3, -0.5)
b. (1, 0)
c. (2, 0)
d. (2, 0.25)
..Question 10
Marks: --/10 Solve the following system of equations:
2x + y = -1
4x + 2y = 2
Choose one answer. a. infinite many solutions
b. no solution
c. (-2, 3)
d. (1, 2)
Solution
These are the answers that I came up with. Im following with the solutions
1D
2A
3C
4D
5B
6C
7B
8D
9C
10B

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1 of 40 2.5 Points Use Cramer’s Rule to solve the following system. x + 2y = 3 3x - 4y = 4 A. {(3, 1/5)} B. {(5, 1/3)} C. {(1, 1/2)} D. {(2, 1/2)} 2 of 40 2.5 Points Solve the following system of equations using matrices. Use Gaussian elimination with back substitution or Gauss-Jordan elimination. x + y - z = -2 2x - y + z = 5 -x + 2y + 2z = 1 A. {(0, -1, -2)} B. {(2, 0, 2)} C. {(1, -1, 2)} D. {(4, -1, 3)} 3 of 40 2.5 Points Use Cramer’s Rule to solve the following system. 2x = 3y + 2 5x = 51 - 4y A. {(8, 2)} B. {(3, -4)} C. {(2, 5)} D. {(7, 4)} 4 of 40 2.5 Points Use Cramer’s Rule to solve the following system. 4x - 5y = 17 2x + 3y = 3 A. {(3, -1)} B. {(2, -1)} C. {(3, -7)} D. {(2, 0)} 5 of 40 2.5 Points Use Cramer’s Rule to solve the following system. 4x - 5y - 6z = -1 x - 2y - 5z = -12 2x - y = 7 A. {(2, -3, 4)} B. {(5, -7, 4)} C. {(3, -3, 3)} D. {(1, -3, 5)} 6 of 40 2.5 Points Use Cramer’s Rule to solve the following system. 3x - 4y = 4 2x + 2y = 12 A. {(3, 1)} B. {(4, 2)} C. {(5, 1)} D. {(2, 1)} Reset Selection 7 of 40 2.5 Points Use Cramer’s Rule to solve the following system. x + y + z = 0 2x - y + z = -1 -x + 3y - z = -8 A. {(-1, -3, 7)} B. {(-6, -2, 4)} C. {(-5, -2, 7)} D. {(-4, -1, 7)} 8 of 40 2.5 Points Solve the following system of equations using matrices. Use Gaussian elimination with back substitution or Gauss-Jordan elimination. 3x1 + 5x2 - 8x3 + 5x4 = -8 x1 + 2x2 - 3x3 + x4 = -7 2x1 + 3x2 - 7x3 + 3x4 = -11 4x1 + 8x2 - 10x3+ 7x4 = -10 A. {(1, -5, 3, 4)} B. {(2, -1, 3, 5)} C. {(1, 2, 3, 3)} D. {(2, -2, 3, 4)} 9 of 40 2.5 Points Solve the following system of equations using matrices. Use Gaussian elimination with back substitution or Gauss-Jordan elimination. x + y + z = 4 x - y - z = 0 x - y + z = 2 A. {(3, 1, 0)} B. {(2, 1, 1)} C. {(4, 2, 1)} D. {(2, 1, 0)} 10 of 40 2.5 Points Solve the system using the inverse that is given for the coefficient matrix. 2x + 6y + 6z = 8 2x + 7y + 6z =10 2x + 7y + 7z = 9 The inverse of: 2 2 2 6 7 7 6 6 7 is 7/2 -1 0 0 1 -1 -3 0 1 A. {(1, 2, -1)} B. {(2, 1, -1)} C. {(1, 2, 0)} D. {(1, 3, -1)} Reset Selection 11 of 40 2.5 Points Use Gaussian elimination to find the complete solution to the following system of equations, or show that none exists. 2w + x - y = 3 w - 3x + 2y = -4 3w + x - 3y + z = 1 w + 2x - 4y - z = -2 A. {(1, 3, 2, 1)} B. {(1, 4, 3, -1)} C. {(1, 5, 1, 1)} D. {(-1, 2, -2, 1)} 12 of 40 2.5 Points Use Cramer’s Rule to solve the following system. x + y = 7 x - y = 3 A. {(7, 2)} B. {(8, -2)} C. {(5, 2)} D. {(9, 3)} 13 of 40 2.5 Points Use Gaussian elimination to find the complete solution to each system. x1 + 4x2 + 3x3 - 6x4 = 5 x1 + 3x2 + x3 - 4x4 = 3 2x1 + 8x2 + 7x3 - 5x4 = 11 2x1 + 5x2 - 6x4 = 4 A. {(-47t + 4, 12t, 7t + 1, t)} B. {(-37t + 2, 16t, -7t + 1, t)} ...

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-- I have two classes One is Carnivore and the other is Herbivore- Eac.docx

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. Answer the following questions about acids 1. What is the phase of all acids? 2. What is the smallest particle to represent an acid? 3. What kind of bond holds acids together? Defend your answer Solution Ans. #1. All acids are present in aqueous phase . # An acid (Arrhenius â€“ Bronsted Lowry acid) is a chemical species that donates a H + . To donate an H + , the acid must be in contact with a H + -acceptor. For most of the acids that we encounter, water acts as a medium or acceptor. Therefore, all acids are present in aqueous phase so that acid molecule can donate an H + -ion to the medium. #2. H + ion is the smallest ion present in an acid. An acid has a general formula of AH â€“ where A is an element (say, Cl) or a group (NO 3 ). In all case, H + ion or H-atom constitutes the smallest particle of an acid because there is no other element in the periodic table smaller than an H-atom. #3. Because of greater difference in the electronegativity of the acidic H-atom and A, the acid molecule has relatively positive charge center at the H-atom, and a negative charge center at the A atom group. So, the bond between H + and A atom/group is relatively polar covalent bond . # The acid molecules may be held together by intermolecular H-bonds (HNO 3 , H 2 SO 4 , HClO 4 , etc. oxoacids), or dipole-dipole attractions (HCl, HCN, HBr, etc.) or other forces depending on the nature of the acid molecule. # Hydrogen bond is a weak attractive force between a highly electronegative atoms (O, N, F) and a H-atoms linked to such atoms. The criteria for H-bonds formation is that there must be - I. A highly electronegative atom ( F, N, O -atom), and II. A H-atoms linked to such atoms (F, N, O). .

- Answer the following questions about acids 1- What is the phase of a.docx

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. At time 110 four processes ( P1 â€“ P4 ) are waiting for a timeout signal. They are scheduled to wake up respectively at times: 130, 145, 175, 210. P1 wakes up and immediately issues a call to SetLTimer (tn, 50 ). Show the priority queue after the call. (call takes no time). Process queue Time Difference Timer Solution Solution: Process queue P2 P4 P3 P5 Time difference 15 35 30 20 Timer 15 .

- At time 110 four processes (P1 P4) are waiting for a timeout signal.docx

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(70 pts) Nuclear History Identify the event in nuclear history that occurred on each of the following dates: August 13, 1942 July 16, 1945 August 9, 1945 April 26, 1986 December 2, 1942 August 6, 1945 October 31, 1952 March 11, 2011 Solution On August 13, 1942, the Manhattan Engineer District was founded to direct and coordinate a series of research projects known as the Manhattan project under the direction of engineer Leslic Groves. On December 2, 1942, Enrico Fermi and his collaborators achieved the first self-sustained and controlled chain fission reaction, only four years after it was discovered that a uranium atom bombarded with neutrons could be split (or fission) generating a large amount of energy and several neutrons that could continue the process by impacting other uranium atoms. July 16, 1945 the first nuclear bomb is detonated in the desert of the Alamo Gordo, in New Mexico (United States). Call the Trinity test. On August 6, 1945, when World War II was about to end, a uranium bomb called \"Little Boy\" was launched by the mythical plane Enola Gay on Hiroshima (Japan) and caused more than 100,000 deaths, besides destroying the city. The order was given by Harry Truman, president of the United States. On August 9, 1945, a plutonium bomb called \"Fat Man\" was dropped on Nagasaki, with results comparable to that released 3 days earlier. Ivy Mike, the first hydrogen bomb (thermonuclear fusion bomb) and that was developed by the Americans. It was detonated in an atoll in the Marshall Islands at 7:15 (local time) on November 1, 1952, or at 7:15 pm on October 31 (world time). On July 26, 1986, the Chernobyl nuclear power plant accident occurred. It was the biggest nuclear catastrophe in history. The explosion took place in the fourth block of the Chernobyl nuclear power station, located only 120 kilometers from the capital of Ukraine - Kiev, near the border with Belarus. As a result of the earthquake and tsunami that occurred on March 11, 2011 in Japan, the Fukushima nuclear power plant was seriously damaged. This number 1 plant of Tokyo Electric Power in Fukushima (known as Daiichi) is located about 270 kilometers northeast of Tokyo, has six boiling light water reactors, operates since 1971 and had permission to continue active until the year 2021. .

(70 pts) Nuclear History Identify the event in nuclear history that oc.docx

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(2) The CPU incorporates several major components (as shown in Fig. describe their major functions. 1). Please Solution CPM stands for Central Processing Unit. It\'s also called as processor . It is considered a s brain of a computer. Is is responsible for performing all functions and processes. It is made up of various transistors and each transistor receive a set of inputs and produces output.The CPU mainly interacts with main memory,referring to it for both instructions and data. The main components of a CPU are listed below: a)Control Unit This is reponsible for fetching the instructions from main memory and the executon of these instructions. It uses electrical signals to instruct the whole computer system for carrying out or executing,already stored program instructions.Its name clearly shows that it controls and co-ordinates computer components.It extracts instructions from memory and decodes and executes them.In fact it regulates the flow of information through the processor. It acts as a bridge between arithmetic unit and memory. b)Registers Registers are temporary storage areas which are responsible for holding the data that is to be processed.They store the instructions and data in a processor.This data is further used by Control Unit.There are some registers that are set aside for specific tasks, these generally include a program counter, stack, and flags. c)Combinational logic This is responsible for performing all arithmetic and logical operations. It performs arithmetic calculations like as addition, subtraction, multiplication and division as well as comparisons.The unit can compare numbers, letters, or special characters.There can be more than one Arithmetic logic unit in a CPU, and these ALUs can also be used for the purpose of maintaining timers that help run the computer. d)Main Memory e)Input/Output:Input sends data to a CPU and output makes the processed information available for the other devices to consume. .

(2) The CPU incorporates several major components (as shown in Fig- de.docx

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(Audit evidence) The third GAAS of field work requires that the auditor obtain sufficient competent audit evidence to afford a reasonable basis for an opinion regarding the financial statements under audit. In considering what constitutes sufficient competent evidential matter, a distinction should be made between underlying accounting records and other information available to the auditor. Required Discuss the nature of audit evidence to be considered by the auditor in terms of the underlying accounting records, other corroborating information available to the auditor, and the methods by which the auditor tests or gathers competent evidence. State the presumptions that can be made about the validity of audit evidence with respect to (1) other information and (2) underlying accounting records. AICPA (adapted) Solution Audit evidence the information available the auditor in arriving at the conclusions in which the audit opinion is based and includes the information contained in the accounting records underlying the financial statement and other informations.the auditor should obtain the audit evidence by testing the accounting records , by analysis and by review. the accounting records some times cannot give the full evidence.the sufficient and approprate evidence is based on the quality of the evidence.some of the SAAs guidliness are given below 1.the evidence are obtained by directly by the auditor. it is more relaible than indirectly obtained by the individual. 2. evidence are more relaible isobtained from the uotside of the entity 3.evidence is more reliable when it is in documentary form. accounting records the accounting records involving the evidence of the internal control over financial reporting.it also check reports such as cheks, invoices,contracts,etc.. the important audit procedures are 1.to understand client and industry : priliminary planning and risk analysis 2.access the risk of meterial misstatement : understand and test internal controls and system processing 3.to gather evidence related to account balance and transactions. .

(Audit evidence) The third GAAS of field work requires that the audito.docx

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What is the Big Bang? Solution Big Bang is a theory which talks ababo the formation of universe. This phenomenon took place 13.8 billion years back. It was first proposed by Georges Lemaitre. He said that a very long time ago, the universe started as just a single point. It stretched and expanded to get as big as it is now, and that it could keep on stretching. When the universe began, it was just hot, tiny particles mixed with light and energy. It was nothing like what we see now. As everything expanded and took up more space, it cooled down. The tiny particles grouped together. They formed atoms. Then those atoms grouped together. Over lots of time, atoms came together to form stars and galaxies. The first stars created bigger atoms and groups of atoms called molecules. That led to more stars being born. At the same time, galaxies were crashing and grouping together. As new stars were being born and dying, then things like asteroids, comets, planets, and black holes formed. .

What is the Big Bang-SolutionBig Bang is a theory which talks ababo th.docx

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What is the concept of sustainable income? Please describe it in your own words. Can you give an example of what this number may look like by using the income statement of a real-life company? Solution Sustainable Income is income from ordinary operational activities which is of a recurring nature. That is the stake holders expectation about continuity of income reported in the future years. The Financial Income statement may contain both transactions pertains to regular operating activities as well as non-recurring and non operational items. If non operational items are of a recurring nature, it may also be taken in to consideration for determining sustainable income. Infact one of the limitation for an Income Statement prepared as per GAAP, is the volatility due to high profit in one period compared to another period. Investors or other persons interested in the financials of a company is more interested in sustainability of the earnings of the company, i.e whether the company will be able to generate the same level income under similar operating conditions. Examples of items which is normally excluded from the calculation of sustainable income are: Gain on sale of a major fixed assets Compensation or grants received from authorities for initial set up or loss incurred under specified conditions Loss of assets due to theft,fire etc. Expenses which will bring benefits for multiple years like major advertisment/ marketing expenses Research and development expenses which brings long time benefits .

What is the concept of sustainable income- Please describe it in your.docx

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What is the backbone for the Internet? Briefly describe how the Internet works. Solution An internet backbone refers to one of the principal data routes betweeen large, strategically interconnected networks and core routers on the internet they provide a consistent way for \"internet service provider\"(isp) to keep and maintain data online with security. Internet: it is a globalsystem of interconnected physicl computer networks such as lan\'s,wan\'s and man\'s. in simple terms network is a network\'s of million\'s of public,private connected with the help of widely available internet working devices. Working of internet: The client initates the process and send request for particular internet service The n/w devices such as modem and ethernet card process the signal so that it can be sent over the local loop carrier or the signal carriers. Loop connects the loaction of user to isp point of presence. it accepts connection from users authentic connetcions.the signal are then transfered to isp regional network consisting of interconnected routers in different cities served by isp. If the packet is supposed to reach the host, whichh is directly served by the isp, then it is delivered to the host.otherwise the packet is sent to isp backbone operator if the packet recived by the backbone is supposed to reach a server then the packet is forwarded to the nearest router. .

What is the backbone for the Internet- Briefly describe how the Intern.docx

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What is the pH of a 0.1 M aqueous solution of NaH2PO4 Solution NaH2PO4 --------------> Na^+ (aq) + H2Po4^- (aq) Ka = 6.8*10^-8 Kb = Kw/Ka = 1*10^-14/6.8*10^-8 = 1.47*10^-7 H2PO4^- (aq) + H2O(l) ----------------> H3Po4(aq) + OH^- (aq) I 0.1 0 0 C -x +x +x E 0.1-x +x +x Kb = [H3PO4][OH^-]/[H2Po4^-] 1.47*10^-7 = x*x/0.1-x 1.47*10^-7 *(0.1-x) = x^2 x = 0.00012 [OH^-] = x = 0.00012M POH = -log[OH^-] = -log0.00012 = 3.92 PH = 14-POH = 14-3.92 = 10.08 .

What is the pH of a 0-1 M aqueous solution of NaH2PO4SolutionNaH2PO4 -.docx

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what is the ph of a 0.16M NaF(aq) solution? Solution NaF(aq) ------------> Na^+ (aq) + F^- (aq) 0.16M 0.16M F^- (aq) + H2O (l) ---------------> HF(aq) + OH^- (aq) I 0.16 0 0 C -x +x +x E 0.16-x +x +x Kb = Kw/Ka = 1*10^-14/6.8*10^-4 = 1.5*10^-11 Kb = [HF][OH^-]/[F^-] 1.5*10^-11 = x*x/0.16-x 1.5*10^-11 *(0.16-x) = x^2 x= 1.55*10^-6 [OH^-] = x = 1.55*10^-6M POH = -log[OH^-] = -log1.55*10^-6 = 5.81 PH = 14-POH = 14-5.81 = 8.19 >>>>answer .

what is the ph of a 0-16M NaF(aq) solution-SolutionNaF(aq) -----------.docx

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What is the pH of a 0.114 M solution of the acid HA if its ionization constant, K A , is 0.16 . Solution HA (aq) -------------> H^+ (aq) + A^- (aq) I 0.11 0 0 C -x +x +x E 0.11-x +x +x Ka = [H^+][A^-]/[HA] 0.16 = x*x/0.11-x 0.16*(0.11-x) = x^2 x = 0.075 [H^+] = x = 0.075M PH = -log[H^+] = -log0.075 = 1.125 >>>>>answer .

What is the pH of a 0-114 M solution of the acid HA if its ionization (1).docx

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What is the minimum number of nodes in an AVL tree of height 8? Let N(H) be the minimum number of nodes in an AVL tree of height h. What is the minimum number of nodes in an AVL tree of height 8? Let N(H) be the minimum number of nodes in an AVL tree of height h. Solution (* contains(t,x) is whether x is in the tree *) fun contains(t: tree, x: value): bool = case t of Empty => false | Node{value, left, right} => (case compare(x, value) of EQUAL => true | LESS => contains(left, x) | GREATER => contains(right, x)) (* add(t,x) is a BST with the same values as t, plus x *) fun add(t: tree, x: value): tree = let fun balance(t: tree): tree = t (* what to write here? *) in case t of Empty => Node{value=x, left=Empty, right=Empty} | Node {value, left, right} => (case compare(x, value) of EQUAL => Node{value=x, left=left, right=right} | LESS => Node{value=value, left=add(left, x), right=right} | GREATER => Node{value=value, left=left, right=add(right,x) } ) end .

What is the minimum number of nodes in an AVL tree of height 8- Let N(.docx

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