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
Taya2010 [7]
2 years ago
5

A) Solve by determinant method: x - y = 2, 2x + 3y = 4​

Mathematics
1 answer:
grin007 [14]2 years ago
4 0

Answer:

x = 2

y = 0

Step-by-step explanation:

x - y = 2

2x + 3y = 4

Using creamers rule of determinants, we have;

D =

|1 1|

|2 3|

Thus; D = (1 × 3) - (1 × 2)

D = 1

Dx =

|2 1|

|4 3|

Dx = (2 × 3) - (1 × 4)

Dx = 2

Dy =

|1 2|

|2 4|

Dy = (1 × 4) - (2 × 2)

Dy = 0

Thus;

x = Dx/D = 2/1

x = 2

y = Dy/D = 0/1

y = 0

You might be interested in
Can you put these number from least to greatest?
Eva8 [605]

The correct order would be:

5/64 x 3, 1/16 x 3, 3/32 x 4, 11/64 x 4, 7/16 x 3, 3/4 x 2, 3/8 x 4, 1 7/8 x 4, 2.25 x 2, 1.5 x 4, 3 3/8 x 3, 3.75 x 3

First we have to take all of the numbers and do the multiplication. It's often easiest to turn them in to decimals so that you have a common form.

3/32 x 4 = 3/8 = .375

3/4 x 2 = 3/2 = 1.5

1 7/8 x 4 = 15/4 = 3.75

2.25 x 2 = 4.5

1.5 x 4 = 6

3/8 x 4 = 3/2 = 1.5

5/64 x 3 = 5/32 = .156

3.75 x 3 = 11.25

1/16 x 3 = 3/16 = .1875

7/16 x 3 = 21/16 = 1.31

3 3/8 x 3 = 81/8 = 10.125

11/64 x 4 = 11/16 = .687

Now we can use those to put in order.

5/64 x 3 = 5/32 = .156

1/16 x 3 = 3/16 = .1875

3/32 x 4 = 3/8 = .375

11/64 x 4 = 11/16 = .687

7/16 x 3 = 21/16 = 1.31

3/4 x 2 = 3/2 = 1.5

3/8 x 4 = 3/2 = 1.5

1 7/8 x 4 = 15/4 = 3.75

2.25 x 2 = 4.5

1.5 x 4 = 6

3 3/8 x 3 = 81/8 = 10.125

3.75 x 3 = 11.25

Which if you are looking for without the extra terms, you can check the answer at the top.

5 0
2 years ago
Ms. Roberts makes bouquets of flowers. Every bouquet of flowers she makes includes 8 flowers. The table below shows the number o
alukav5142 [94]
She made 28 bouquets of flowers!
7 0
2 years ago
Please help me!!! Thanks!
Vlada [557]

Answer:

I believe it's "D" 13.1

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Error Analysis: George was trying to rearrange the formula below to slope-intercept form, y = mx + b. by
Nat2105 [25]

Answer:

George's mistake would be:

Instead of 2x + 40, she has made - x + 20.

Step-by-step explanation:

Slope - Intercept Form = y = mx + b

y + 20 = 2(x +20)

y + 20 = 2x + 40

   - 20          - 20

----------------------

y = 2x + 20

(Should have been the answer)

BUT,

George's Solving:

y + 20 = 2(x + 20)

y + 20 = -x + 20

George's Mistake would be her miscalculation during her 2nd step. Where instead of distributing 2 to (x + 20), she has changed it to -x + 20, when in reality, it should have been 2x + 40.

7 0
3 years ago
how can you write a sum of numbers as the product of their GCF (greatest common factor)and another sum?
Rama09 [41]
Example: 12+24 GCF: 12: 1,2,3,4,6,12 24: 1,2,3,4,6,8,24 Common factors: 1,2,3,4,6 Greatest factor: 6 Divide: 12 divided 6= 2 24 divided 6= 4 12+24= 6x(2+4)
6 0
3 years ago
Other questions:
  • F(x)=2(0.65)^x is exponential growth or decay
    14·1 answer
  • A 37 foot board must be cut into two parts. The longer part is one foot larger than the twice the shorter part. How long is each
    7·1 answer
  • Need help with this I'm so confused :(:(​
    6·1 answer
  • Help and you get candy :3
    13·2 answers
  • Find the total area of the figure. Do not label the solution.
    11·1 answer
  • Write an equation in point-slope form of the line that passes through the point (7,-5) with slope -1/7.
    5·1 answer
  • Asap 50 points! <br>-3xy = what when x=5 and y= -6<br>answers : <br>-90<br>90<br>-33<br>33​
    8·2 answers
  • Please answer who ever answers first and correct will get brainliest
    12·2 answers
  • Find the x- and y-intercepts of the parabola y=x2+10x+4
    10·1 answer
  • Will give brainliest NEED HELP can some explain how to do this THANKS :D
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!