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]
3 years ago
15

X + y = 12

Mathematics
2 answers:
liberstina [14]3 years ago
8 0
We are given with two equations to find the values of two variables, hence the problem can be solved.

Adding the two equations:

x + y = 12<u>x - y = 10
</u>2x    = 22
<u />x =11
y = 1
Agata [3.3K]3 years ago
3 0

Answer:

Option C is correct

value of the x-determinant for the system is, -2

Step-by-step explanation:

Given the system of equation:

x + y =12

x -y =10

Represents the system of equations in matrix format:

\begin{bmatrix} 1 & 1\\ 1 & -1 \end{bmatrix}\begin{bmatrix}x\\y\end{bmatrix} = \begin{bmatrix}12\\ 10\end{bmatrix}

Now, to find the determinant of a matrix.

Formula for the determinant of matrix:

\begin{bmatrix}a & b\\ c & d\end{bmatrix} = ad-bc

then;

The value of the x-determinant:

\begin{bmatrix}1 & 1\\ 1 & -1\end{bmatrix}

Using determinant(D) formula:

D= (1)(-1)-(1)(1) = -1 -1 = -2

Therefore, the value of the x-determinant for the system is, -2


You might be interested in
ABIGAIL ORDERS A LARGE 2 TOPPING PIZZA FOR $14 AND A MEDIUM 1 TOPPING PIZZA FOR $10. IF ALL COST OF A MEDIUM PIZZA ARE 80% OF A
geniusboy [140]
She shouldn't. She can get a 2 topping pizza for $7.99 at Pizza Hut instead.
6 0
3 years ago
Abby is helping the art teacher pass out paint. She finds 9 full jugs of paint on a shelf. Each jug holds 3 liters. How much pai
sashaice [31]
27 liters of paint... 3 liters per jug a total of 9 jugs meaning 9x3=27
6 0
3 years ago
Let P(x) be the statement"x= x2", If the domain consists of the integers, what are these truth values? (a) P(0) (b) P(1) (c) P(2
jeka57 [31]

Answer: i guess the problem is with P(x) => "x = x^{2}", then P(x) is true if that equality is true, and is false if the equality is false.

so lets see case for case.

a) x = 0, and 0^{2} = 0. So p(0) is true.

b) x = 1 and 1^{2} = 1, so P(1) is true.

c) x = 2, and 2^{2} = 4, and 2 ≠ 4, then P(2) is false.

d) x= -1 and 1^{2} = 1, and 1 ≠ -1, so P(-1) is false.

6 0
3 years ago
In a bag, there are three red marbles, four blue marbles, two yellow marbles and three black marbles. What is the probability of
charle [14.2K]

Answer:

3/12 chance

Step-by-step explanation:

3 0
3 years ago
A ramp has a rise of 10 feet and run of 50 feet find the slope
Goshia [24]
Slope = rise/run = 10/50 = 1/5
7 0
3 years ago
Read 2 more answers
Other questions:
  • four students have to give a speech in class today. In how many different orders can they give their speeches?
    11·2 answers
  • I don't understand..please help:
    14·1 answer
  • What is the slope of the line shown below? (8,8) (5,5)
    8·2 answers
  • -8x+4y=-3
    8·2 answers
  • What is the value of this expression?
    11·1 answer
  • One length of a rectangular garden lies along a patio wall.​ However, the rest of the garden is enclosed by 28 feet of fencing.
    10·1 answer
  • The geometric sequence bn is defined below. Find b3.<br> B1 = 54<br> R= -1/3
    13·1 answer
  • Please help this is confusing
    15·1 answer
  • PLEAAASEEEE FOR THE LOVE OF GOD<br> for f(x) = 5 - 2 (x + 4)^2 find<br><br> f (2a -1)
    11·1 answer
  • Nonlmf'adnklsek;lk;kjfjklljkfsjklfsk
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!