Solve the system of equations using a matrix. Separate the x and y values with a comma. 2x-y=6 & 3x-y=11

Answers

Answer 1
[tex]\left\{\begin{array}{ccc}2x-y=6\\3x-y=11\end{array}\right\\\\ \left[\begin{array}{ccc}2&-1\\3&-1\end{array}\right\left|\begin{array}{ccc}6\\11\end{array}\right]\xrightarrow{r_1-r_2} \left[\begin{array}{ccc}-1&0\\3&-1\end{array}\right\left|\begin{array}{ccc}-5\\11\end{array}\right]\xrightarrow{r_2+3r_1}[/tex]
[tex]\left[\begin{array}{ccc}-1&0\\0&-1\end{array}\right\left|\begin{array}{ccc}-5\\-4\end{array}\right]\xrightarrow{(-1)r_1;(-1)r_2}\left[\begin{array}{ccc}1&0\\0&1\end{array}\right\left|\begin{array}{ccc}5\\4\end{array}\right]\\\\Answer:\ \left\{\begin{array}{ccc}x=5\\y=4\end{array}\right\to(5;\ 4)[/tex]

Related Questions

john buys a new bedroom set on credit for $2760 and no interest. he pays $115 per month. what is the equation that models the money john owes?

Answers

Suppose that the equation is modeled by a linear equation:
let the amount owed by John, is y at time time,x.
the linear equation is given by:
y=mx+c
where:
m=slope
c=y-intercept
from the information:
c=$2760
m=$115
thus amount owe will be:
y=-115x+2760

Ginger wanna join a gym.she goes to the local gym and is told that there is a one-time fee of $100 to join and then a monthly fee of $30.if she belongs to the gym for one year then the 12th month is free.how much will a one year membership cost her?

Answers

100+30m from the last problem
100+30(11)
100+330
430 dollars, which is highway robbery..

How many two-digit positive integers can be formed from the digits 1, 5, 6, and 8 if no digit is repeated?

Answers

Total Number of digits = 4

We have to fill two places using the 4 digits without repeating the digits.

The first place digit can be filled in 4 ways. When first place is filled, one number is already taken, so now we can fill the second place using remaining 3 digits (3 ways)

So, the total number of ways of forming 2 digit numbers = 4 x 3 = 12 ways

Which number is irrational? A. square root of 64 B. square root of 256 C. square root of 100 D. square root of 80

Answers

the square foot is 100 that is the number that is irrational ur welcome.
D its 80 square root of 80 is 8.94427191

what does 3P2 equal?

Answers


No one has mentioned, so I will. What you are looking for is the permutation of 3 things taken 2 at a time. In other words, how many different unique ways are there to arrange 3 items, say colored balls, taking 2 of them for each group. By unique, I mean that 1 red and 1 blue is the same as 1 blue and 1 red,

Antar is flying a triangular-shaped kite. it has a height of 41/2 feet and a base of 53/4 feet. what is the area of antar's kite?

Answers

So 5 3/4 base and 4 1/2 height

A= HbxB/2 = 4.5*5.75/2= 12.94ft

Answer:

12.94

Step-by-step explanation:

Check out the Points Scored by Lebron James during his 2012 season: 10,11.15, 18, 20, 20, 21,23, 24, 24, 26

A sport Statistics Magazine said his Median Score was 21 is that True or False?

A. True

B. False

Answers

Median: The middle of the numbers
10, 11, 15, 18, 20, 20, 21, 23, 24, 24, 26

Median is 20 (the middle of those numbers)

So,
False not 20

The height of a triangular road sign is 1 inch shorter than twice its base. if the area of the sign is 60 in.2, which equation could be used to find the base (b) of the sign?

Answers

Final answer:

The equation that can be used to find the base of the triangular road sign is 60 = (b * (2b - 1)) / 2.

Explanation:

Let's assume that the base of the triangular road sign is represented by b. According to the problem, the height of the sign is 1 inch shorter than twice its base, which can be written as:

height = 2b - 1

The area of a triangle can be calculated using the formula Area = (base * height) / 2. Substituting the given values into the formula, we get:

60 = (b * (2b - 1)) / 2

This equation can be used to find the base, b, of the sign.

Learn more about Equation to find the base of the triangular road sign here:

https://brainly.com/question/13462582

#SPJ12

Given the three vertices F(-5, 0), G(3, -3), and H(-2, 8), what are the coordinates of I that make quadrilateral FGIH a square

Answers

The coordinates are: (6,5)

A box contains 3 blue and 2 red pens while another box contains 2 blue and 5 red pens. a pen drawn at random from one of the boxes turns out to be blue. what is the probability that it came from the first box

Answers

There are 5 blue pens total, 3 are from the first box and 2 are from the second. The probability of pulling a blue pen from the first box and not the second is 3/5.

The probability of getting blue from the first box is 3/5.

Given that, a box contains 3 blue and 2 red pens while another box contains 2 blue and 5 red pens.

What is the probability?

Probability can be defined as the ratio of the number of favourable outcomes to the total number of outcomes of an event. For an experiment having 'n' number of outcomes, the number of favourable outcomes can be denoted by x. The formula to calculate the probability of an event is as follows.

Probability(Event) = Favorable Outcomes/Total Outcomes = x/n.

The probability of getting blue from the first box:

The number of favourable outcomes = 3 and the number of total outcomes =5

So, P(E) = 3/5

The probability of getting blue from the second box:

The number of favourable outcomes = 2 and the number of total outcomes =7

So, P(E) = 2/7

Therefore, the probability of getting blue from the first box is 3/5.

To learn more about the probability visit:

https://brainly.com/question/14210034.

#SPJ2

1 and 2 are a linear pair, and 2 and 3 are vertical angles. m 2=(5+4 y) and m 3=(6 y-25). what is m 1

Answers

vertical angles are equal to each other:
        ∠2     =    ∠3
     5 + 4y = 6y - 25
 →      30 = 2y
→       15 = y

∠2 = 5 + 4y = 5 + 4(15) = 5 + 60 = 65

linear pairs equal 180:
     ∠1 + ∠2 = 180
→ ∠1 + 65 = 180
→      ∠1    = 115

The equation for the line of best fit for a data set is y = 2x + 1.5. If the point (1, 4) is in the data set, what is the residual of 1? 0.5 3.5 4.0 7.5

Answers

It is related to econometrics, however using simple algebraic logic we can solve this problem. General formula with residual is [tex]y=2x+1.5+r[/tex], where r is a residual. Plugging the pair into the formula, we obtain that [tex]4=2*1+1.5+r[/tex] and r=0.5

Answer: First option is correct.

Step-by-step explanation:

Since we have given that

[tex]y=2x+1.5[/tex]

If the point (1,4) is in the data set.

we need to find the residual of 1.

At x = 1,

[tex]y=2x+1.5\\\\y=2\times 1+1.5\\\\y=2+1.5\\\\y=3.5[/tex]

So, At x = 1, the value of y = 3.5

As we know that

[tex]Residual\ value=Estimate\ value-Actual\ value\\\\Residual\ value=4-3.5\\\\Residual\ value=0.5[/tex]

Hence, The residual of 1 is 0.5.

Thus, First option is correct.

The width of a rectangle is 4 less than half the length. if l represents the length, which equation could be used to find the width, w?

Answers

W-4=1/2L
W=1/2L+4
This is the answer

What do you call it when someone pays back a loan quickly

Answers

Hello!
If someone pays back a loan quickly its called a sudden debt payoff.
Hope this helps!
This question is actually a joke, because there is no specific name for when someone pays off a lean quickly. I have came across a few worksheets with this same question on it, so the answer is below. 

ANSWER: "A Sudden Debt Pay Off"

18. you work a part-time job earning $6.80/hr with tips that average $2.30/hr. you work 20 hr/wk and your deductions are FICA (7.65%), federal tax withholding (8.95%), and state tax withholding (6.1%). how much are you allowed in housing expenses per month?

Im asking for help not for you to do it.

Answers

Total housing expenses per month allowed will be $168.81.

To calculate how much you are allowed in housing expenses per month, we need to first determine your after-tax income.

You earn $6.80/hr plus tips averaging $2.30/hr, resulting in an hourly wage of

$6.80 + $2.30 = $9.10

Working 20 hours a week gives you a weekly income of

20 hours × $9.10/hr = $182

Monthly, this equates

$182  4 weeks = $728

The deductions are as follows: FICA (7.65%), federal tax withholding (8.95%), and state tax withholding (6.1%). These deductions total to

7.65% + 8.95% + 6.1% = 22.7%

To get the after-tax income, we calculate

$728 - (22.7% × $728)

≈ $562.69

This is your monthly take-home pay.

Financial experts often recommend spending no more than 30% of your take-home pay on housing. Therefore

$562.69 × 30%

= $168.81 houses expenses per month

The variable z varies jointly with x and y. also, z = -75 when x = 3 and y = -5. what equation describes this variation?

Answers

The equation describing variation will be found as follows:
zαxy
z=kxy
where k is the proportionality constant
k=z/xy
when x=3, y=-5 then z=-75
k=-75/(-5*3)=5
hence the formula will be:
z=5xy


Answer:

c

5

-10

Step-by-step explanation:

Solve the proportion. Show your work.

Answers

3/x+1=5/11 first cross multiply 
3*11=33 and 5*x+1= 5x+5          5x+5=33 
then subtract 5 on both sides 5x+5-5=33-5 
5x=28 so divide 5 on both sides 
5x/5=28/5 
x= 5.6
Hope I Helped 

Park rangers released 12 fish into a pond in year 0. Each year, there were twice as many fish as the year before. How many fish were there after x years? Write a function to represent this scenario.

Answers

y = 12 + 2x

This is probably right. I'm 99% sure. :)

Answer: The function would be,

[tex]f(x)=12(2)^x[/tex]

Step-by-step explanation:

Given,

Park rangers released 12 fish into a pond in year 0,

Thus, the initial number of fish = 12,

Also, there were twice as many fish as the year before,

⇒ After 1 year the number of fishes = 2(12) = 12(2),

Similarly,

After 2 years = 2(12(2))= 12(2)²,

After 3 years = 2(12(2)²) = 12(2)³,

................, so on,....

Thus, the number of fishes after x years would be,

[tex]12(2)^x[/tex]

Let f(x) represents the number of fish after x years,

[tex]\implies f(x) = 12(2)^x[/tex]

Which is the required function that the given scenario.

A professor uses a video camera to record the motion of an object falling from a height of 250 meters. The function f(x) = –5x2 + 250 can be used to represent the approximate height of the object off the ground after x seconds. Which is the best estimate for the amount of time elapsed when the object is 120 meters off the ground? 4 seconds 5 seconds 6 seconds 7 seconds
(The answer is 5 seconds)

Answers

did you answer your own question?

Answer:

B is the answer

Step-by-step explanation:

i just took the test

i need help with number 2 please p

Answers

2b-1=26-4b
6b=27
b=4.5

if you plug it back in both sides equal 8

what is the largest possible product of two odd integers whose sum is 42?

Answers

441. 

You can tell this because the largest area of any rectangle is when it is a square. Even sides will always produce the greatest area. Thus, 21 and 21 would be the best numbers to use. 

The largest possible product of two odd integers whose sum is 42 is 437, obtained from multiplying 19 by 23.

The question asks for the largest possible product of two odd integers whose sum is 42. To find this, we should split 42 into two odd numbers that are as close to each other as possible because the product of two numbers that are close together will be higher than the product of a pair that has a larger difference.

If we divide 42 by 2, we get 21, which is not an even integer, so we need to adjust the numbers by 1. So the two odd numbers closest to each half of 42 are 21 and 21. However, we can't have them both be the same number since we're looking for two integers, so we adjust one up and one down by 1, resulting in 20 and 22. To ensure both numbers are odd, we will subtract 1 from the first number and add 1 to the second number, giving us 19 and 23 as the two odd integers that sum to 42.

The product of 19 and 23 is 19 × 23 = 437, which is the largest possible product for two odd integers that add up to 42.

When rounding to.the nearest hundred are you to add or subtract?

Answers

basically you don't really do either, mostly because when your rounding you mostly just look at the number your rounding to. okay so say your number is like 127 you would round to 100 because your number would've been below 150. And we know that five is the middle of every thing. 10 and the whole number system is made up of tens. So when you have to choose to round you have to go up to the next ten so say your number is 27 since it's above 5 you would round to 30. So if you have 127 it's below the 5 mark (which would be 150) so you would round to 100 because it's below that mark. 

Answer:

When you round to the nearest hundred:

150 or higher turns into 200, so you'd do add.

But when it's 149 or lower, you simply subtract it by 49.

Step-by-step explanation:


What is the IMA of the doorknob shown?

1.5
3
6
15

Answers

To solve this problem you must apply the proccedure shown below:

 1. You must apply the following formula for calculate the IMA of the doorknob shown in the figure attached of the problem above:

 IMA=outer radius/inner radius

 outer radius=3 cm
 inner radius=0.5 cm

 2. When you substitute these values into the formula, you obtain:

 IMA=3 cm/0.5 cm
 IMA=6

Therefore, the answer is: 6

Answer:

6

Step-by-step explanation:

point m lies between point L and N on LN

Answers

Answer:

  64 units

Step-by-step explanation:

Segment addition holds, so we can write ...

  LM + MN = LN

  (10x +8) +(5x-4) = (12x +16)

  15x + 4 = 12x + 16 . . . . . . . . collect terms

  3x -12 = 0 . . . . . . . . . . . . . .  subtract 12x+16

  x-4 = 0 . . . . . . . . . . . . . . . . . divide by 3

  x = 4 . . . . . . . add 4

LN = 12x +16 = 12·4 +16 = 48 +16 . . . . . substitute into the expression for LN

LN = 64 . . . . units

All at once, pandemonium broke loose. ______________ the marching band came around the corner, dogs began barking, and the horses pulling the mayor's carriage began to run!

Which word best completes the passage above? (5 points)


Anyway

Because

Following

Simultaneously

Answers

Answer:

The answer is word SIMULTANEOUSLY.

Step-by-step explanation:

The alternative that fits best is " d.Simultaneously"

All at once, pandemonium broke loose. Simultaneously, the marching band came around the corner, dogs began barking, the horses pulling the Mayors carriage began to run.

This word maintains the coherence and cohesion of the given text.

Answer:

The alternative that fits best is  " d. Simultaneously"

Step-by-step explanation:

Thus, the complete sentence would read:  "All at once, pandemonium broke loose. Simultaneously the marching band came around the corner, dogs began barking, and the horses pulling the mayor's carriage began to run!"

The explanation for this is that the word "Simultaneously" is the only one that fits the phrase, and maintains the coherence and cohesion of the text.  The words "anyway", "because", and "following", when embedded in the phrase, change the meaning of what the author wanted to go through.

Mitchell and Luke record the number of deliveries they each make for their family's restaurant. The results are shown in the box plots below.

Select the true statement.

The interquartile range of Mitchell's data is greater than the interquartile range of Luke's data.


Mitchell's data and Luke's data have the same interquartile range.

The median number of deliveries made by Mitchell each week is greater than the median number of deliveries made by Luke each week.

The median number of deliveries made by Mitchell each week is equal to the median number of deliveries made by Luke each week.

Answers

The correct answer is the first:
 The interquartile range of Mitchell's data is greater than the interquartile range of Luke's data.
 Since the interquartile range (RIC) is equal to:

 RIC = Q3-Q1

 Of the gracifa can be observed quer for the case of Mitchell:
 RIC = 34-25 = 9

 While for Luke's case:
 RIC = 36-28 = 8.

 Therefore Mitchell's interquartile range (RIC) is greater than Luke's.

Answer:

A. The interquartile range of Mitchell's data is greater than the interquartile range of Luke's data.

Step-by-step explanation:

The Venn diagram represents the results of a survey that asked participants whether they would want a dog or a cat as a pet.

Enter your answers in the boxes to complete the two way table based on the given data.

Dog Not dog Total

Cat ___ ___ ____

Not
Cat ___ ____ ____

Total ___ ____ ____

Answers

 Arrange the numbers shown on the diagram into the correct category:                

                      Dog                Not dog                 Total  

Cat                     31                      10                      41

Not  Cat              24                     7                       31    

Total                    55                   17                       72

What is the recursive formula for the sequence 3, 12, 48, 192, 768...?

Answers

Final answer:

The given sequence is a geometric sequence. Each term in the sequence multiplies by 4 to obtain the next. Therefore, the recursive formula for the sequence is an = 4 * an-1.

Explanation:

The given sequence is: 3, 12, 48, 192, 768, and so on. Looking at the sequence, we can see that each term is multiplied by 4 to get the next term. So, the sequence is a geometric sequence. The recursive formula for a geometric sequence is given by: an = r * an-1, where an is the nth term, r is the common ratio, and an-1 is the previous term. In this case, r equals 4 (since we are multiplying each term by 4 to get the next term). Thus, "the recursive formula for this geometric sequence is: an = 4 * an-1".

Learn more about Geometric Sequence here:

https://brainly.com/question/34721734

#SPJ3

Must have third quartile of a data set be less than the maximum value? Explain.

Answers

Since there is an even number of values, we need the mean of the middle two values to find the first quartile:                                                                                                                                                                                                  The lower half of a data set is the set of all values that are to the left of the median valuewhen the data has been put into increasing order. 


Seven subtracted from the quotient of a number and 2 is -6

Answers

n/2 -7 = -6

add 7 to both sides;
n/2 -7+7 = -6+7

n/2 = 1
multiply both sides by 2 (  or divide by 1/2 ) in order to get n by itself.

n/2 * 2/1 = 1 * 2/1

n = 2

18 / n - 7 = 2  

18 / n =9  

18 = 9n  

2 = n  


18 / 2 - 7 = 2  

9 - 7 = 2  

2 = 2

Other Questions
Real GDP is calculated using unchanging prices.TrueFalse [30 Points] Can you guys help me with this, please? Thank you in advance. The development of specialized tissues and organs in a multicellular organism's embryo occurs as a result of The length of the minute hand is 150% of the length of the hour hand.In one hour, how much farther does the tip of the minute hand move than the tip of the hour hand? Round your answer to the nearest tenth. Braedons employer is requiring his employees to work ten-hour days for the next week, starting on April 10th. In which workplace is Braedon most likely working?a mortgage companya credit uniona tax preparation officean insurance company To protect a movie, what category of intellectual property would be used? select one:a. copyrightb. service markc. trademarkd. patent how are homologous structures such as forelimbs evidence for evolution ? Who ever answers all of this gets brainliest4 Types of Sentences AssignmentRead each sentence and decide if it is simple, compound, complex, or compound- complex.1. Because Sean was late, he didnt get a good seat.2. After picking flowers, Mark put them in a vase, and he gave them to his mom.3. They ate chocolate cake while reading their new books.4. I went to the mall yesterday, but I didnt find a new dress.5. The dog slept in the sun.6. Rosie and Julie moved into their dorm rooms; they were right down the hall from each other.7. We baked a pie, and we gave it to the neighbor after it cooled.8. Quit thinking about pie and cake!Write your own example of the 4 types of sentences.Simple:Compound:Complex:Compound-Complex: President Roosevelt and the members of his administration gave speeches that warned of Japans rising power in the Pacific. What was the point of the speeches? During the follicular phase, granulosa cells secrete ________, which stimulates secretion of ________. If 152 grams of ethane (c2h6) are reacted with 231 grams of oxygen gas, what is the mass of the excess reactant leftover after the reaction has reached completion? 2c2h6(g) + 7o2(g) 4co2(g) + 6h2o(g) Does maryland board of nursing accept straighterline A _______ is a list of instructions for the computer to follow to accomplish the task of processing data into information. systems design word processor program systems analysis Whats the correct answer? 400,000 + 80,000 + 4,000 + 50 + 9 Write the standard form of the number shown above. A mirrored-glass gazing globe in a garden is 28.0 cm in diameter. part a what is the focal length of the glob Lulu was thrilled to learn that the results show for american idol would start 30 minutes later than usual, accommodating her practice schedule. clearly the show producers were not aware of lulu's schedule, although she doesn't see it that way. lulu's self-absorption is an example of The cars of a roller coaster ride have a speed of 30 km/hr as they pass over the top of the circular track. neglect any friction and calculate their speed v when they reach the horizontal bottom position THE RIGHT ANSWER WILL RECIEVE A BRAINLEST AND 55 POINTS!!!if someone has diabetes please help ill add some question s to who has diabetes and please answer them.pretend that you have to do this 5 excerisez -Yoga-Tai chi-walking-Dancing-Swimmingand then answer these questionsDo you normally excersize?How did you find my workout plan, please give some details?Would you make any adjustments and if so, what would you adjust?How did the excersize make you feel?Would you be interested in continuing the exsersizes? Will an increase in water temp damage aquarium plants