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
natita [175]
3 years ago
9

11. Which matrix represents the system of equations below?

Mathematics
1 answer:
dimulka [17.4K]3 years ago
4 0

Answer:

\left[\begin{array}{cccc}-12&-13&13&|15\\7&-10&-3&|11\\7&14&5&\:\:\:|-5\end{array}\right]

Step-by-step explanation:

The system of equations is;

-12x-13y +13z =15

7x-10y-3z = 11

7x+14y +5z = -5

The coefficient matrix is \left[\begin{array}{ccc}-12&-13&13\\7&-10&-3\\7&14&5\end{array}\right]

The constant matrix is \left[\begin{array}{c}15\\11\\-5\end{array}\right]

The augmented matrix is \left[\begin{array}{cccc}-12&-13&13&|15\\7&-10&-3&|11\\7&14&5&\:\:\:|-5\end{array}\right]

You might be interested in
Elisa saved $30 in July,$21.50 in august, and $50 in September. He spent $18 on movies and $26.83 on gas. how much money does El
Eva8 [605]

Answer:

$56.67

Step-by-step explanation:

$30+$21.50+$50=101.50

$101.50-$18=$83.50

$83.50-$26.83=$56.67

4 0
3 years ago
-3x+5y=-9 and 4x+8y=12
insens350 [35]

-3x + 5y = -9

4x + 8y = 12

Simplify the second,

x + 2y = 3

Times three,

3x + 6y = 9

Add to the first equation,

11y = 0

y = 0

-3x + 5(0) = -9

x = 3

Answer: x=3, y=0

4 0
3 years ago
Read 2 more answers
Austin is paid a salary of $475 weekly. Find the Austin’s earnings per year
nordsb [41]
Assuming there are no breaks, there are 52 weeks in a year so 475(52)= 24700
7 0
3 years ago
If the class contains 11 boys and 14 girls, what is the probability of calling on a girl?
Ronch [10]

Answer: P (girl) = 14 / 25

Concept:

Here, we need to know the idea of probability.  

Probability is a measure of the likelihood of an event to occur.  

If you are still confused, please refer to the attachment below for a graphical explanation.

Solve:

Number of boys = 11

Number of girls = 14

Total number of people = 11 + 14 = 25

P (girl) = Favorable / Total (refer to the attachment)

P (girl) = 14 / 25

Hope this helps!! :)

Please let me know if you have any questions

8 0
3 years ago
Does anyone know the answer?
SSSSS [86.1K]

Answer:

12

Step-by-step explanation:

a2+b2=c2 since the hypotenuse is 13 you would square it to get 169 and then you would square 5 and get 25 you would subtract 169-25 and get 144 then you would square root that number and get 12 so then your answer is 12 in.

5 0
3 years ago
Other questions:
  • Sarah is making paper cones to serve nuts for a party at school. The volume of each cone is 78 cubic centimeters, and the height
    7·1 answer
  • In 103.4, the digit 0 is in the tens place. Its value is?
    12·1 answer
  • In an electrical circuit, the current is related to the power and resistance according to the rule I=pR−−√, where I represents t
    8·1 answer
  • What is the equation of the following graph in vertex form? Courtesy of Texas Instruments A. y = (x − 4)2 − 4 B. y = (x + 4)2 −
    5·1 answer
  • Find the missing side of the triangle.​
    5·2 answers
  • How do you perform constructions related to circles? What theorems and explanations can be used to justify these constructions?
    6·1 answer
  • Solve the equation and enter the value of x below. 9x + 4 + x = 54​
    6·2 answers
  • Order the steps for simplifying an expression with three operations
    7·1 answer
  • Question 3 (2 points)
    10·1 answer
  • Please help I'll give 50 points and brainliest!!!
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!