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
My name is Ann [436]
3 years ago
9

Use cramers rule to solve each system of equations :

Mathematics
1 answer:
Snowcat [4.5K]3 years ago
5 0

Answer:

just follow the rules

Step-by-step explanation:

Cramer's rule applies to the case where the coefficient determinant is nonzero. ... A simple example where all determinants vanish (equal zero) but the system is still incompatible is the 3×3 system x+y+z=1, x+y+z=2, x+y+z=3.

Write the system as a matrix equation. ...

Create the inverse of the coefficient matrix out of the matrix equation. ...

Multiply the inverse of the coefficient matrix in the front on both sides of the equation. ...

Cancel the matrix on the left and multiply the matrices on the right.

You might be interested in
In an older television set, the screen height is 0.75 times the screen width.
natima [27]
The television set has a rectangular shape. The diagonal of this rectangle along with its width and length together form a right angular triangle.
This means that we can apply the Pythagorean theorem which states that:
(diagonal)^2 = (length)^2 + (width)^2

Let the width be w. We know that the length is 0.75 times the width, this means that: length = 0.75 w

Substitute in the above equation:
(20)^2 = (0.75w)^2 + (w)^2
400 = 0.5625 w^2 + w^2
400 = 1.5625 w^2
w^2 = 256
w = 16

This means that the width of the screen is 16 in. 
5 0
3 years ago
Use the diagram below to solve for x and y. Please help! Fast if possible.
Mila [183]

Answer:

x = 27

y = 29

Step-by-step explanation:

8 0
3 years ago
Sara travels often for her job. The miles she traveled for the last seven work days are shown. 88, 72, 91, 65, 86, 93, 97 Which
Troyanec [42]

Answer:

21

Step-by-step explanation:

3 0
3 years ago
What is 494 x 20.62 rounded to the hundredths place?
DENIUS [597]
10186.28
And that’s how you do it
8 0
3 years ago
Read 2 more answers
What is the length of YZ in XYZ
Studentka2010 [4]

AZ=12 - is hypotenuse

∠XZY=30° ⇒

XY=\dfrac{1}{2} \times12=6

\text{By the Pythagorean theorem}\\YZ=\sqrt{12^2-6^2} =\sqrt{(12-6)(12+6)} =\sqrt{6\times18} =\sqrt{108} =6\sqrt{3}

3 0
2 years ago
Other questions:
  • How would I solve this?? 5p-8(p+1)>16
    10·1 answer
  • Simplify (-6^1/3)^(-2)=
    7·1 answer
  • Please help! What’s the mean of 13, 13, 10?
    9·1 answer
  • PLEASE HELP ME ON THIS....<br> thx
    14·1 answer
  • I have a value that is 35% of the total value. I want to know what the total value is and what formula is used to work this out?
    11·1 answer
  • As you're heading out for a rousing evening of playing Dungeons and Dragons, you grab your pouch of dice. Unfortunately, the dra
    9·1 answer
  • A softball pitcher has 0.626 probability of throwing a strike for each pitch if the softball pitcher throws 30 pitches what is t
    9·1 answer
  • Find the limit. Use l'Hospital's Rule where appropriate. If there is a more elementary method, consider using it. lim x → (π/2)+
    11·1 answer
  • the temperature in an experiment is increased at a constant rate over a period of time until the temperature reaches 0 degrees c
    10·2 answers
  • Find the values of x and y. ​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!