Help with this math question?

Determine which of the following matrix equations represents the solution to the system:

2x + y = 2

5x + 3y = 13.
by

2 Answers

Answer :

2x+y=2

5x+3y=13

=>

|| 2 1 ||*|| x ||=|| 2 ||

|| 5 3 ||.|| y ||..||13||

=>

|| x ||=|| 3 -1||*|| 2 ||

|| y ||=||-5..2||.||13||

=>

|| x ||=||-7 ||

|| y ||..||16||

is the answer
by

Answer :

6x+3y = 6

x = -7

y = 16
by

Related questions

How to tell the greater power? (math question)

Description : How to tell the greater power? (math question)

Last Answer : answer:Compare the logs? Taking log from the first one you get 15272 log(45362) and from the second one you get 37589 log(26453) which can be compared easily.

Simple math question, what does log mean?

Description : Simple math question, what does log mean?

Last Answer : Log is a logarithm. Wikipedia for a better explanation: http://en.wikipedia.org/wiki/Logarithm

Can someone help me with my math assignment?

Description : Can someone help me with my math assignment?

Last Answer : We don't do people's homework here, but we can help in other ways. For instance, some of us can suggest an approach. One would hope, though, that your instructor has already prepared you to ... you take your shot at answering the question, and then post your answer and ask if others will comment?

Can someone help me out with my math homework?

Description : Can someone help me out with my math homework?

Last Answer : answer:Sure. Here on Fluther, we're not allowed to tell you exactly how to do a homework problem, but I can point you in the right direction. The slope-intercept formula for a line is y=mx+b, ... the y intercept, you still have two points. Hint: The x coordinate of the y intercept is always 0.

Can anyone help me figure out my math problem?

Description : Can anyone help me figure out my math problem?

Last Answer : answer:Hmm (9–2x) (5–2x) – 45 (7x) (3x) – 45 21 – 45x = -24 looks right but its been a while, you just got it positve.

Desperate need of math homework help! (Merchandise Math)

Description : Desperate need of math homework help! (Merchandise Math)

Last Answer : answer:its too late/early but maybe this page will help you. sorry i suck at math. although i love shopping he he.. (9) Markup = The difference between the cost of an item ... sale - VERY BIG FILE 712 PAGES http://accountant.intuit.com/member_programs/qb_advisor/pos_cert/v6/qbposv60_user_guide.pdf

How do you solve this math word problem? PLEASE HELP ME AND EXPLAIN STEP BY STEP!!!?

Description : A lumberyard charges $ 1 per cut to trim boards. Bob buys a 12-ft board and wants it out into twelve 1-ft pieces. How much will he be charged for the cutting? The correct answer is $11.

Last Answer : It takes 11 cuts to cut a 12 foot board into 12 pieces. It always takes 1 less cut than the number of pieces wanted. If you want 2 pieces, you cut once. If you want 3 pieces, you cut twice. Etc.

Did we invent math,or did we discover it?

Description : Did we invent math,or did we discover it?

Last Answer : God invented it.

What is the order of operations in math?

Description : What is the order of operations in math?

Last Answer : answer:Please excuse my dear Aunt Sally Parentheses, exponents, multiplication and division, addition and subtraction.

In math, why do we have to do the order of operations in the order we do?

Description : In math, why do we have to do the order of operations in the order we do?

Last Answer : It’s just agreed upon. I don’t think it matters other than what is agreed upon, to share formulas across the globe.

What's the best math program to manipulate polygons?

Description : What's the best math program to manipulate polygons?

Last Answer : Have you tried Google Sketchup? It’s fun, frustrating, and free.

Can you check the math on this? (Details)

Description : Can you check the math on this? (Details)

Last Answer : answer:They don’t add the swipe fee on to the customers bill, they deduct it from the restaurant’s total. The original amount is $100, not $103. The swipe fee is deducted from the total charged, so he submits $100 in charges to the credit card company, they credit his account with $97.

Is university math less frustrating than high school math?

Description : Is university math less frustrating than high school math?

Last Answer : It would be wise to think high school isn’t an accurate representation of college. I hated history classes in high school. Loved them in College.

Can you tell me how to solve this math/statistics problem?

Description : Can you tell me how to solve this math/statistics problem?

Last Answer : answer:It's very straightforward. Once you know how to do it, you can accomplish many things. First, the most important thing is the standard cumulative Normal distribution. With a normal distribution of mean ... 4772 So, about 47.72% of people, or about 143 people, spend between 40 and 51 minutes.

I'm having some Math trouble?

Description : I'm having some Math trouble?

Last Answer : What is a variable expression?

How do I figure out this simple math fraction?

Description : How do I figure out this simple math fraction?

Last Answer : Do you mean 93¼ percent? Because 93¼ really is 93.25.

Can you solve this simple math problem for me?

Description : Can you solve this simple math problem for me?

Last Answer : answer:It is 1.86 times 422, divided by 100. $7.85

Translate words into math equation?

Description : Translate words into math equation?

Last Answer : answer:Replace “a number” and “the same number” with x. Replace “is” with = The sum of something and something else is the same as something + something else. That should get you started. Let me know if you need more help.

Does anyone know a good study online site for Pharmacy technician math?

Description : Does anyone know a good study online site for Pharmacy technician math?

Last Answer : answer:If you know the kind of math you need to learn, Purplemath and Khan Academy are both very good resources. When I typed pharmacy math in YouTube, I got quite a few ... ExCPT exams and Continuing Education information for experienced Technicians. It also says that it's completely free.

Which branch of math would you say is the most difficult?

Description : Which branch of math would you say is the most difficult?

Last Answer : answer:AP Geometry was the most difficult for me. I had it during my freshman year in high school. I don't know why exactly, but I had a hard time remembering the different theorems and formulas. ... they think. Some people are good at all kinds of math while others struggle even with the basics.

In real life we have situations such as: Rock > Scissors, Scissors > paper and Paper > Rock. Is there a type of math to deal with this?

Description : In real life we have situations such as: Rock > Scissors, Scissors > paper and Paper > Rock. Is there a type of math to deal with this?

Last Answer : answer:In Modular Arithmetic the numbers wrap around. That might be a good place to start to define the rules mathematically. As a kid we played rock, paper, scissors, bomb,. Symbol for bomb was fist with ... Bomb destroys rock, etc. .... Mod 4 Rock, paper,scissors, lizard, Spock would be Mod 5

In math, using decimals, how would 10.01 be written out in words?

Description : In math, using decimals, how would 10.01 be written out in words?

Last Answer : Well, I’d say ten point o-one, but yes, 0.01 is one hundredth, so 10.01 is ten units and one hundredth.

Why don't these two identical math equations equal the same thing? (See picture.)

Description : Why don't these two identical math equations equal the same thing? (See picture.)

Last Answer : Once the gif started cutting the boxes into pieces, it’s all optical illusion. they changed the number of boxes in the rectangle with that little geometric magic.

Math geeks: How do i do eigenvalue decomposition of a scalar matrix?

Description : Math geeks: How do i do eigenvalue decomposition of a scalar matrix?

Last Answer : answer:Your information isn't quite accurate. Finding eigenvalues of scalar matrices is pretty much the easiest thing in the world: they are the scalar value with multiplicity n (where n is the size of the matrix) ... help. I used to teach this, and really love linear algebra. This is fun for me. :)

What are the best books that will allow me to teach myself math?

Description : What are the best books that will allow me to teach myself math?

Last Answer : Solving equations and such sounds more like high-school maths to me. You can always revisit your old high-school math books if you still have them. They are usually pretty good (but tend to repeat ... at quickly teaching you the subject of interest, but you do still have to put in the work.

What math equation should I use to represent amount of caffeine according to this chart?

Description : What math equation should I use to represent amount of caffeine according to this chart?

Last Answer : Making the simplifying assumption that the drink goes in a single gulp and all the caffeine goes into the bloodstream immediately, all you are left with is exponential decay (caffeine metabolized) and step functions ( ... x (½)^(time step/half-life)] + Caffiene ingested at new time (see half-life)

What are these math problems called and how do you figure them out?

Description : What are these math problems called and how do you figure them out?

Last Answer : ? What math problems?

Why do we need math?

Description : Why do we need math?

Last Answer : nice tags…

Can you figure out this math problem?

Description : Can you figure out this math problem?

Last Answer : I’m Too stupid…

What is your favorite math problem?

Description : What is your favorite math problem?

Last Answer : this one

Someone help me with this interest rate question (details inside)

Description : Someone help me with this interest rate question (details inside)

Last Answer : More than it was worth. Looks like about $540.00 but I have been drinking so I could be way off!!!

A matrix question on the Gaussian elimination method?

Description : A matrix question on the Gaussian elimination method?

Last Answer : answer:Are you having trouble setting up the equations? They seem fairly straightforward. The first sentence gives us x + y + z = 110,000. Then .09x + .08y + .13z= 10,435, and finally x + y - 3z = ... got this far, show the work you did for the solution, and I can check to see where you went wrong.

Will you explain this decimal-to-fraction question to me?

Description : Will you explain this decimal-to-fraction question to me?

Last Answer : answer:.6 = 6/10 or 3/5 It does not = 3/10. It also does not = ⅔. Your program is wrong. ⅔ = 0.6666…

Simply maths question about rearranging formulas?

Description : Simply maths question about rearranging formulas?

Last Answer : answer:I'm not sure I quite remember how to do these types of problems. What I can offer is 0=0 is the answer I came up with quickly by trying to solve the equation. I couldn't find my old calc notebook, but you ... the left side uv = u^2+uv - u^2 subtraction of u^2 uv = uv divide by uv 0 = 0

Could someone explain this trigonometry question for me?

Description : Could someone explain this trigonometry question for me?

Last Answer : answer:So I’ll explain what I get. lets replace h:o and d:a tan= o/a but of course we don’t have the full length of a so by rearranging it to o=tanθ a isn’t the right answer so far. I don’t get why tanθ2 / tan θ2 -tanθ1 is there.

A quadratic reciprocity question to finish my thesis?

Description : A quadratic reciprocity question to finish my thesis?

Last Answer : Yes, it can be done. Yes…. Done.

Can you help me to work this out?

Description : Can you help me to work this out?

Last Answer : You bought it for $75,00.

Homework Help: Solving Ratios in Mathematics?

Description : Homework Help: Solving Ratios in Mathematics?

Last Answer : answer:The first step is to combine the two ratios A:B and B:C into one ratio A:B:C. A:B = 5:2 = 15:6 B:C = 3:2 = 6:4 A:B:C = 15:6:4 Now, this means that if you had 25 grams of salt ... You have 750 = 25*30 grams of salt, so these numbers must also be multiplied by 30. 450g in A 180g in B 120g in C

Need help figuring out my final grade for the semester.

Description : Need help figuring out my final grade for the semester.

Last Answer : answer:79.1% * 50% + 80% * 15% + 60% * 35% = 0.7297 Your final grade would be 72.97%, assuming the minimum score for both the paper and the essay.

Can someone help with some linear algebra theory?

Description : Can someone help with some linear algebra theory?

Last Answer : answer:Practical algebra lessons I didn't get what Rn is. If it's vector, you may read basic vector operations here. If you want to go up to differentiation and integration, you may look ... and vectors from Vector Mechancis for engineers by Beer and Johnston; it is a mechanical engineering book.

Can anyone help me with lascap's fractions?

Description : Can anyone help me with lascap's fractions?

Last Answer : I did a Google search on Lascap's fractions and could not find a definition. It seems that this is some kind of proprietary teaching tool. As the topics you chose indicate, the name Lascap ... you are working on? Maybe we could help you with the answer without knowing what Lascap fractions are.

Can somebody help me solve this cipher?

Description : Can somebody help me solve this cipher?

Last Answer : I’m really puzzled, and don’t see the purpose in translating white noise into anything meaningful. There is nothing there. It’s just static. In the bottom example I began to see a skeleton face in the pixels, but that’s only because my mind took me there, and not because of any hidden image.

Can someone help me generating a specific logrythmic scale?

Description : Can someone help me generating a specific logrythmic scale?

Last Answer : If the ratings are r1, r2,...,rn then convert each ri to ri*100/(r1+r2+...+rn)

Help on arithmetic series?

Description : Help on arithmetic series?

Last Answer : .

Is it possible to solve a magic square made up of a system of unknown symbols?

Description : Is it possible to solve a magic square made up of a system of unknown symbols?

Last Answer : No. I could populate a 9×9 magic square with the letters A through I. You would never figure out what numbers were represented by the letters because a 9×9 magic square is not unique.

How many of you can pass this simple test?

Description : How many of you can pass this simple test?

Last Answer : I can.

How can two infinite sets not have one to one correspondence with each other?

Description : How can two infinite sets not have one to one correspondence with each other?

Last Answer : You've missed what an infinite set means. Consider this definition: Infinite sets are the sets containing an uncountable or infinite number of elements. Infinite sets are also called uncountable sets. That is ... . Or for the set of all positive integers and the set of all negative integers .

Using the rays in the diagram, how many different acute angles can be formed?

Description : Using the rays in the diagram, how many different acute angles can be formed?

Last Answer : We don’t do your homework, but this is a simple combinatorics problem. Any pair of those rays will form an acute angle. How many pairs are there?

What’s 0.222222222... as a simplified fraction?

Description : What’s 0.222222222... as a simplified fraction?

Last Answer : 2/9

If somebody choose two digit and three digit numbers and their difference is 989.What will be their sum? a) 1000 b)1010 c) 1006?

Description : If somebody choose two digit and three digit numbers and their difference is 989.What will be their sum? a) 1000 b)1010 c) 1006?

Last Answer : None of the above. Let x be the three digit number and y be the two digit number. x - y =989. x = 989 + y. x is obviously greater than 989 and less than 1000 (since it is three digits). Since y is a two digit number ... 989 + 10 = 999. We can't go any higher, so x =999 and y=10. x+y = 999+10 = 1009