1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lubov Fominskaja [6]
3 years ago
8

The system of equations is given:

Mathematics
1 answer:
Nutka1998 [239]3 years ago
6 0

Answer:

x=-1/85; y=-283/85; z=2/17

Step-by-step explanation:

Using an algebraic method like elimination or substitution would take a lot of steps which could lead to mistake the calculations. In this case, I decided to use the Gaussian elimination. We can express the system in matrix form as follows:

\left[\begin{array}{ccc}2&-4&6\\9&-3&1\\5&0&9\end{array}\right] \left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}14\\10\\1\end{array}\right]

To begin the calculations, we write the system in augmented matrix form and use the Gaussian elimination:

\left[\begin{array}{ccccc}2&-4&6&|&14\\9&-3&1&|&10\\5&0&9&|&1\end{array}\right]

By applying the Gaussian elimination, the final matrix is the following:

\left[\begin{array}{ccccc}1&0&0&|&-1/85\\0&1&0&|&-283/85\\0&0&1&|&2/17\end{array}\right]

In order to verify the results, it´s enough to substitute the calculated values in the original equations to see if the equalities are correct. Here you can see the verification for all of the equations:

2(-1/85)-4(-283/85)+6(2/17)=14\\9(-1/85)-3(-283/85)+1(2/17)=10\\5(-1/85)+9(2/17)=1

You might be interested in
What does a line mean in a maths equation
Cerrena [4.2K]

A line means divided by

So basically if it was 1/2, then it would be 1 divided by 2.

P. S. 1 divided by 2 is not the answer I'm just explaining what a line is

8 0
3 years ago
Find the monthly payment for the loan. Finance $500,000 for an apartment complex with a 12.3% 10-year loan.
Marina86 [1]

Using it's formula, it is found that the monthly payments for the loan of the apartment is of $7,260.50.

<h3>What is the monthly payment formula?</h3>

It is given by:

A = P\frac{\frac{r}{12}\left(1 + \frac{r}{12}\right)^n}{\left(1 + \frac{r}{12}\right)^n - 1}

In which:

  • P is the initial amount.
  • r is the interest rate.
  • n is the number of payments.

In this problem, the parameters are given as follows:

P = 500000, r = 0.123, n = 12 x 10 = 120.

Hence:

r/12 = 0.123/12 = 0.01025.

Then, the monthly payments will be of:

A = P\frac{\frac{r}{12}\left(1 + \frac{r}{12}\right)^n}{\left(1 + \frac{r}{12}\right)^n - 1}

A = 500000\frac{0.01025(1+0.01025)^{120}}{(1+0.01025)^{120} - 1}

A = 7260.50.

More can be learned about the monthly payment formula at brainly.com/question/26267630

#SPJ1

6 0
2 years ago
HELP!!! ASAP!!!
ololo11 [35]

1+1+2+2+3+3+4+4+5+5 is your answer. If it's wrong I'm sorry

7 0
2 years ago
The table shows the height of Sonya‘s siblings who is taller Frida or Julia compare their hearts using the simple &gt;
Vladimir [108]

Answer:

The  height of Julio greater than  the height of Frieda .

Step-by-step explanation:

Given height as :

The height of Frieda = 5\frac{1}{4} ft

The height of Julio = 5\frac{5}{6} ft

So, The height of Frieda = 5\frac{1}{4}

                                         = 5 + \frac{1}{4}

                                         = \frac{20+1}{4}

                                         = \frac{21}{4}  feet

∴  The height of Frieda = 5.25 feet

And The height of Julio = 5\frac{5}{6} ft

So, The height of Julio    = 5\frac{5}{6}

                                         = 5 + \frac{5}{6}

                                         = \frac{30+5}{6}

                                         = \frac{35}{6}  feet

∴ The height of Julio    = 5.83 feet

Since 5.83 feet  > 5.25 feet

So  the height of Julio >  the height of Frieda

Hence The  height of Julio greater than  the height of Frieda . Answer

5 0
3 years ago
Item Measured Scale Reading (tons) Number of Items on the Scale Weight per Item (tons)
Mrac [35]
I don’t the know I just need points. Sorry I’m doing an essay really need answer sorry HAVE A NICE DAY HOPE U GET UR ANSWER
7 0
2 years ago
Read 2 more answers
Other questions:
  • Find the amplitude and period of the function <br><br> y=3/2 cos(4/3x)
    10·1 answer
  • What 18x+90=180 i have to solve like a equation
    13·2 answers
  • If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen
    13·1 answer
  • 6,051.2 rounded to the nearest thousand
    14·1 answer
  • Mr. Kovich writes the problem
    9·2 answers
  • Please help fast with correct answer no guessing answer. Only answer if actually know the answer
    6·1 answer
  • What must be done to the wires used to make an electromagnet before they connect
    12·2 answers
  • Will give brainliest for correct answer
    12·2 answers
  • 13. After Valentine's Day, boxes of chocolates go on sale and are marked down 10%. The
    11·1 answer
  • PLEASE ANSWER ONLY IF RIGHT.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!