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
lubasha [3.4K]
3 years ago
9

Which matrix can be used to solve the system?

Mathematics
1 answer:
Brut [27]3 years ago
4 0
It's the last choice.  In the top row you have the 1's that are the coefficients on the x and the y, and the solution for that equation is 21; in the second row you have the 5 from the x and the 4 from the y and the solution for that equation which is 20.  I'm more used to writing them down instead of across, but there you have it anyways
You might be interested in
PLEASE HELP HELPPPPPPPPP
professor190 [17]

Answer:

x+2y=- 7

x-2y =9

Step-by-step explanation:

Solving Steps

2x+4y=-14

x-2y=9

Divide both sides

(2x+4y) ÷2=-14=2

{x-2y=9

Remove the parentheses

Divide

2x÷2+4y÷2=-7

x-2y =9

Divide

Solution

x+2y=- 7

x-2y =9

5 0
2 years ago
Read 2 more answers
Numbers 10, 100, 1,000, and so on are called
wlad13 [49]
I do believe that those are called numbers
8 0
3 years ago
Read 2 more answers
Whats the relationship between the 6s in 660,472?
Bond [772]
The six in the right is 10times more than the 6 on the left then the other way arounft
6 0
3 years ago
Read 2 more answers
How do you rotate 90 degrees counterclockwise about the origin?
andriy [413]
When rotating 90 degrees counterclockwise about the origin, the original coordinates are changed according to the rule (-y, x). Therefore, we take the original coordinates and switch them up accordingly to the rule listed above. When we do so, we get the coordinates Z'(4,0); J'(2,-5); L'(3,0). Hope this helps and have a phenomenal day!

5 0
3 years ago
It’s been a long summer. How do you find a percent of a fraction?
Stolb23 [73]
Do you have a calculator? If so, divide the numerator by the denominator. For example... 2/7: take 2 divided by 7 and you get 28.6%
7 0
3 years ago
Other questions:
  • Find the area of the largest trapezoid that can be inscribed in a circle of radius 1 and whose base is a diameter of the circle.
    15·1 answer
  • Michael paid $11.48 for sliced cheese at the deli counter. The cheese cost $3.28 per pound. How much cheese did he buy?
    12·2 answers
  • SOMEONE PLEASE HELP!!!!!!!!!!!!!!!!!!1
    13·2 answers
  • Assinale todas as assertivas corretas com relação aos princípios de ensino na Matemática.
    13·1 answer
  • What's <br> 9 + (28 − 2) ÷ 0.2
    12·1 answer
  • 12.8° to the nearest degree
    7·2 answers
  • A line with a slope of -4 has a coordinate of (0,3). If the other coordinate is (6,t),
    14·1 answer
  • After lunch, you need to buy new shoes. You bought a pair last year and they cost $79.00. Now, the same shoes cost $86.00. By wh
    7·1 answer
  • NEED STEP BY STEP WORK HIGH POINTS
    5·2 answers
  • How many ways can Caroline choose 6 courses of any type?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!